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angular-docs-cn/packages/core/test/acceptance/styling_spec.ts
Misko Hevery eb32b6bd6b refactor(core): Remove reliance on TNodeType.View. (#38707) 
`TNodeType.View` was created to support inline views. That feature did
not materialize and we have since removed the instructions for it, leave
 an unneeded `TNodeType.View` which was still used in a very
 inconsistent way. This change no longer created `TNodeType.View` (and
 there will be a follow up chang to completely remove it.)

Also simplified the mental model so that `LView[HOST]`/`LView[T_HOST]`
always point to the insertion location of the `LView`.

PR Close #38707
2020-09-28 16:15:59 -04:00

3605 lines
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/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {CommonModule} from '@angular/common';
import {Component, ComponentFactoryResolver, ComponentRef, Directive, ElementRef, HostBinding, Input, NgModule, Renderer2, ViewChild, ViewContainerRef} from '@angular/core';
import {bypassSanitizationTrustStyle} from '@angular/core/src/sanitization/bypass';
import {ngDevModeResetPerfCounters} from '@angular/core/src/util/ng_dev_mode';
import {TestBed} from '@angular/core/testing';
import {getElementClasses, getElementStyles, getSortedClassName, getSortedStyle} from '@angular/core/testing/src/styling';
import {By, DomSanitizer, SafeStyle} from '@angular/platform-browser';
import {expect} from '@angular/platform-browser/testing/src/matchers';
import {ivyEnabled, modifiedInIvy, onlyInIvy} from '@angular/private/testing';
describe('styling', () => {
beforeEach(ngDevModeResetPerfCounters);
describe('apply in prioritization order', () => {
it('should perform static bindings', () => {
@Component({template: `<div class="STATIC" style="color: blue"></div>`})
class Cmp {
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const [staticDiv] = fixture.nativeElement.querySelectorAll('div');
expect(getSortedClassName(staticDiv)).toEqual('STATIC');
expect(getSortedStyle(staticDiv)).toEqual('color: blue;');
});
it('should perform prop bindings', () => {
@Component({
template: `<div [class.dynamic]="true"
[style.color]="'blue'"
[style.width.px]="100"></div>`
})
class Cmp {
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(getSortedClassName(div)).toEqual('dynamic');
expect(getSortedStyle(div)).toEqual('color: blue; width: 100px;');
});
onlyInIvy('style merging is ivy only feature').it('should perform map bindings', () => {
@Component({
template: `<div [class]="{dynamic: true}"
[style]="{color: 'blue', width: '100px'}"></div>`
})
class Cmp {
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(getSortedClassName(div)).toEqual('dynamic');
expect(getSortedStyle(div)).toEqual('color: blue; width: 100px;');
});
onlyInIvy('style merging is ivy only feature')
.it('should perform interpolation bindings', () => {
@Component({
// TODO(misko): change `style-x` to `style` once #34202 lands
template: `<div class="static {{'dynamic'}}"
style.color="blu{{'e'}}"
style-x="width: {{'100'}}px"></div>`
})
class Cmp {
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(getSortedClassName(div)).toEqual('dynamic static');
expect(getSortedStyle(div)).toEqual('color: blue;');
});
onlyInIvy('style merging is ivy only feature').it('should support hostBindings', () => {
@Component({
template:
`<div my-host-bindings-2 my-host-bindings-1 class="STATIC" style="color: blue"></div>`
})
class Cmp {
}
@Directive({
selector: '[my-host-bindings-1]',
host: {'class': 'HOST_STATIC_1', 'style': 'font-family: "c1"'}
})
class Dir1 {
}
@Directive({
selector: '[my-host-bindings-2]',
host: {'class': 'HOST_STATIC_2', 'style': 'font-family: "c2"'}
})
class Dir2 {
}
TestBed.configureTestingModule({
declarations: [
// Order of directives in the template does not matter.
// Order of declarations matters as it determines the relative priority for overrides.
Dir1,
Dir2,
// Even thought component is at the end, it will still have lowest priority because
// components are special that way.
Cmp,
]
});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(getSortedClassName(div)).toEqual('HOST_STATIC_1 HOST_STATIC_2 STATIC');
expect(getSortedStyle(div)).toEqual('color: blue; font-family: c2;');
});
it('should support hostBindings inheritance', () => {
@Component({template: `<div my-host-bindings class="STATIC" style="color: blue;"></div>`})
class Cmp {
}
@Directive({host: {'class': 'SUPER_STATIC', 'style': 'font-family: "super"; width: "1px";'}})
class SuperDir {
}
@Directive({
selector: '[my-host-bindings]',
host: {'class': 'HOST_STATIC', 'style': 'font-family: "host font"'}
})
class Dir extends SuperDir {
}
TestBed.configureTestingModule({declarations: [Cmp, Dir]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(getSortedClassName(div))
.toEqual(ivyEnabled ? 'HOST_STATIC STATIC SUPER_STATIC' : 'HOST_STATIC STATIC');
// Browsers keep the '"' around the font name, but Domino removes it some we do search and
// replace. Yes we could do `replace(/"/g, '')` but that fails on android.
expect(getSortedStyle(div).replace('"', '').replace('"', ''))
.toEqual(
ivyEnabled ? 'color: blue; font-family: host font; width: 1px;' :
'color: blue; font-family: host font;');
});
onlyInIvy('style merging is ivy only feature')
.it('should apply template classes in correct order', () => {
@Component({
template: `
<div class="STATIC DELETE_MAP_A DELETE_PROP_B"
[class]="{foo: true, DELETE_MAP_A: false}"
[class.bar]="true"
[class.DELETE_PROP_B]="false"></div>
`
})
class Cmp {
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const classDiv = fixture.nativeElement.querySelector('div');
expect(getSortedClassName(classDiv)).toEqual('STATIC bar foo');
});
onlyInIvy('style merging is ivy only feature')
.it('should apply template styles in correct order', () => {
@Component({
template: `
<div style="width: 100px; height: 200px: color: red; background-color: yellow"
[style]="{width: '110px', height: null}"
[style.color]=" 'blue' "
[style.height.px]="undefined"></div>
`
})
class Cmp {
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const styleDiv = fixture.nativeElement.querySelector('div');
expect(getSortedStyle(styleDiv))
.toEqual('background-color: yellow; color: blue; width: 110px;');
});
it('should work with ngClass/ngStyle', () => {
@Component(
{template: `<div [ngClass]="['dynamic']" [ngStyle]="{'font-family': 'dynamic'}"></div>`})
class Cmp {
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(getSortedClassName(div)).toEqual('dynamic');
expect(getSortedStyle(div)).toEqual('font-family: dynamic;');
});
});
onlyInIvy('CSS variables are only supported in Ivy').describe('css variables', () => {
const supportsCssVariables = typeof getComputedStyle !== 'undefined' &&
typeof CSS !== 'undefined' && typeof CSS.supports !== 'undefined' &&
CSS.supports('color', 'var(--fake-var)');
it('should support css variables', () => {
// This test only works in browsers which support CSS variables.
if (!supportsCssVariables) {
return;
}
@Component({
template: `
<div [style.--my-var]="'100px'">
<span style="width: var(--my-var)">CONTENT</span>
</div>
`
})
class Cmp {
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const span = fixture.nativeElement.querySelector('span') as HTMLElement;
expect(getComputedStyle(span).getPropertyValue('width')).toEqual('100px');
});
it('should support css variables with numbers in their name inside a host binding', () => {
// This test only works in browsers which support CSS variables.
if (!supportsCssVariables) {
return;
}
@Component({template: `<h1 style="width: var(--my-1337-var)">Hello</h1>`})
class Cmp {
@HostBinding('style') style = '--my-1337-var: 100px;';
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const header = fixture.nativeElement.querySelector('h1') as HTMLElement;
expect(getComputedStyle(header).getPropertyValue('width')).toEqual('100px');
});
});
modifiedInIvy('shadow bindings include static portion')
.it('should bind [class] as input to directive', () => {
// VE Behavior https://stackblitz.com/edit/angular-cycpsf
// IVY behavior is slightly different see next test with same name.
@Component({
template: `
<div class="s1" [class]=" 'd1' " dir-shadows-class-input></div>
<div class="s2 {{'d2'}}" dir-shadows-class-input></div>
`
})
class Cmp {
}
@Directive({selector: '[dir-shadows-class-input]'})
class DirectiveShadowsClassInput {
constructor(private elementRef: ElementRef) {}
@Input('class')
set klass(value: string) {
this.elementRef.nativeElement.setAttribute('shadow-class', value);
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveShadowsClassInput]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const [div1, div2] = fixture.nativeElement.querySelectorAll('div');
// Static value `class="s1"` is always written to the DOM.
expect(div1.className).toEqual('s1');
// VE passes the dynamic portion of `class` to the directive.
expect(div1.getAttribute('shadow-class')).toEqual('d1');
// Interpolation `class="s2 {{'d2'}}"` does not have a static portion and so no value is
// written to DOM.
expect(div2.className).toEqual('');
expect(div2.getAttribute('shadow-class')).toEqual('s2 d2');
});
onlyInIvy('shadow bindings include static portion')
.it('should bind [class] as input to directive', () => {
// VE Behavior https://stackblitz.com/edit/angular-cycpsf
// IVY behavior is slightly different see next test with same name.
@Component({
template: `
<div class="s1" [class]=" 'd1' " dir-shadows-class-input></div>
<div class="s2 {{'d2'}}" dir-shadows-class-input></div>
`
})
class Cmp {
}
@Directive({selector: '[dir-shadows-class-input]'})
class DirectiveShadowsClassInput {
constructor(private elementRef: ElementRef) {}
@Input('class')
set klass(value: string) {
this.elementRef.nativeElement.setAttribute('shadow-class', value);
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveShadowsClassInput]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const [div1, div2] = fixture.nativeElement.querySelectorAll('div');
// Static value `class="s1"` is always written to the DOM.
expect(div1.className).toEqual('s1');
// VE has weird behavior where it calls the @Input('class') with either `class="static` or
// `[class]="dynamic"` but never both. This is determined at compile time. Due to locality
// we don't know if `[class]` is coming if we see `class` only. So we need to combine the
// static and dynamic parts. This results in slightly different calling sequence, but should
// result in the same final DOM.
expect(div1.getAttribute('shadow-class')).toEqual('s1 d1');
expect(div2.className).toEqual('');
expect(div2.getAttribute('shadow-class')).toEqual('s2 d2');
});
it('should not feed host classes back into shadow input', () => {
@Component({
template: `
<div class="s1" dir-shadows-class-input></div>
<div class="s1" [class]=" 'd1' " dir-shadows-class-input></div>
`
})
class Cmp {
}
@Directive({selector: '[dir-shadows-class-input]', host: {'class': 'DIRECTIVE'}})
class DirectiveShadowsClassInput {
constructor(private elementRef: ElementRef) {}
@Input('class')
set klass(value: string) {
this.elementRef.nativeElement.setAttribute('shadow-class', value);
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveShadowsClassInput]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const [divStatic, divBinding] = fixture.nativeElement.querySelectorAll('div');
expectClass(divStatic).toEqual({'DIRECTIVE': true, 's1': true});
expect(divStatic.getAttribute('shadow-class')).toEqual('s1');
expectClass(divBinding).toEqual({'DIRECTIVE': true, 's1': true});
// VE has weird behavior where it calls the @Input('class') with either `class="static` or
// `[class]="dynamic"` but never both. This is determined at compile time. Due to locality
// we don't know if `[class]` is coming if we see `class` only. So we need to combine the
// static and dynamic parts. This results in slightly different calling sequence, but should
// result in the same final DOM.
expect(divBinding.getAttribute('shadow-class')).toEqual(ivyEnabled ? 's1 d1' : 'd1');
});
it('should not feed host style back into shadow input', () => {
@Component({
template: `
<div style="width: 1px;" dir-shadows-class-input></div>
<div style="width: 1px;" [style]=" 'height:1px;' " dir-shadows-class-input></div>
`
})
class Cmp {
}
@Directive({selector: '[dir-shadows-class-input]', host: {'style': 'color: red;'}})
class DirectiveShadowsStyleInput {
constructor(private elementRef: ElementRef) {}
@Input('style')
set style(value: string) {
this.elementRef.nativeElement.setAttribute('shadow-style', value);
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveShadowsStyleInput]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const [divStatic, divBinding] = fixture.nativeElement.querySelectorAll('div');
expectStyle(divStatic).toEqual({'color': 'red', 'width': '1px'});
expect(divStatic.getAttribute('shadow-style')).toEqual('width: 1px;');
expectStyle(divBinding).toEqual({'color': 'red', 'width': '1px'});
// VE has weird behavior where it calls the @Input('style') with either `style="static` or
// `[style]="dynamic"` but never both. This is determined at compile time. Due to locality
// we don't know if `[style]` is coming if we see `style` only. So we need to combine the
// static and dynamic parts. This results in slightly different calling sequence, but should
// result in the same final DOM.
expect(divBinding.getAttribute('shadow-style'))
.toEqual(ivyEnabled ? 'width: 1px; height:1px;' : 'height:1px;');
});
onlyInIvy('shadow bindings include static portion')
.it('should bind [class] as input to directive when both static and falsy dynamic values are present',
() => {
@Component({
template: `
<div class="s1" [class]="classBinding" dir-shadows-class-input></div>
`
})
class Cmp {
classBinding: any = undefined;
}
@Directive({selector: '[dir-shadows-class-input]'})
class DirectiveShadowsClassInput {
constructor(private elementRef: ElementRef) {}
@Input('class')
set klass(value: string) {
this.elementRef.nativeElement.setAttribute('shadow-class', value);
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveShadowsClassInput]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(div.className).toEqual('s1');
expect(div.getAttribute('shadow-class')).toEqual('s1');
fixture.componentInstance.classBinding = null;
fixture.detectChanges();
expect(div.className).toEqual('s1');
expect(div.getAttribute('shadow-class')).toEqual('s1');
fixture.componentInstance.classBinding = false;
fixture.detectChanges();
expect(div.className).toEqual('s1');
expect(div.getAttribute('shadow-class')).toEqual('s1');
fixture.componentInstance.classBinding = {toString: () => 'd1'};
fixture.detectChanges();
expect(div.className).toEqual('s1');
expect(div.getAttribute('shadow-class')).toEqual('s1 d1');
});
modifiedInIvy('shadow bindings include static portion')
.it('should bind [style] as input to directive', () => {
// VE Behavior https://stackblitz.com/edit/angular-cycpsf
@Component({
template: `
<div style="color: red;" [style]=" 'width: 100px;' " dir-shadows-style-input></div>
`
})
class Cmp {
}
@Directive({selector: '[dir-shadows-style-input]'})
class DirectiveShadowsStyleInput {
constructor(private elementRef: ElementRef) {}
@Input('style')
set style(value: string) {
this.elementRef.nativeElement.setAttribute('shadow-style', value);
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveShadowsStyleInput]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(div.style.cssText).toEqual('color: red;');
// VE has weird behavior where it calls the @Input('class') with either `class="static` or
// `[class]="dynamic"` but never both. This is determined at compile time. Due to locality
// we
// don't know if `[class]` is coming if we see `class` only. So we need to combine the two
// This results in slightly different calling sequence, but should result in the same final
// DOM.
expect(div.getAttribute('shadow-style')).toEqual('width: 100px;');
});
onlyInIvy('shadow bindings include static portion')
.it('should bind [style] as input to directive', () => {
// VE Behavior https://stackblitz.com/edit/angular-cycpsf
@Component({
template: `
<div style="color: red;" [style]=" 'width: 100px;' " dir-shadows-style-input></div>
`
})
class Cmp {
}
@Directive({selector: '[dir-shadows-style-input]'})
class DirectiveShadowsStyleInput {
constructor(private elementRef: ElementRef) {}
@Input('style')
set style(value: string) {
this.elementRef.nativeElement.setAttribute('shadow-style', value);
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveShadowsStyleInput]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(div.style.cssText).toEqual('color: red;');
// VE has weird behavior where it calls the @Input('class') with either `class="static` or
// `[class]="dynamic"` but never both. This is determined at compile time. Due to locality
// we
// don't know if `[class]` is coming if we see `class` only. So we need to combine the two
// This results in slightly different calling sequence, but should result in the same final
// DOM.
expect(div.getAttribute('shadow-style')).toEqual('color: red; width: 100px;');
});
it('should prevent circular ExpressionChangedAfterItHasBeenCheckedError on shadow inputs', () => {
@Component({template: `<div class="s1" dir-shadows-class-input></div>`})
class Cmp {
}
@Directive({selector: '[dir-shadows-class-input]'})
class DirectiveShadowsClassInput {
@Input('class') klass: string|undefined;
@HostBinding('class')
get hostClasses() {
return `${this.klass} SUFFIX`;
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveShadowsClassInput]});
const fixture = TestBed.createComponent(Cmp);
expect(() => fixture.detectChanges()).not.toThrow();
const div = fixture.nativeElement.querySelector('div');
expect(div.className).toEqual('s1 SUFFIX');
});
it('should recover from exceptions', () => {
@Component({
template: `
<div [id]="maybeThrow(id)">
<span my-dir [class]="maybeThrow(klass)" [class.foo]="maybeThrow(foo)"></span>
</div>
`
})
class Cmp {
id = 'throw_id';
klass: string|string[] = 'throw_klass';
foo = `throw_foo`;
maybeThrow(value: any) {
if (typeof value === 'string' && value.indexOf('throw') === 0) {
throw new Error(value);
}
return value;
}
}
let myDirHostBinding = false;
@Directive({selector: '[my-dir]'})
class MyDirective {
@HostBinding('class.myDir')
get myDir(): boolean {
if (myDirHostBinding === false) {
throw new Error('class.myDir');
}
return myDirHostBinding;
}
}
TestBed.configureTestingModule({declarations: [Cmp, MyDirective]});
const fixture = TestBed.createComponent(Cmp);
const cmp = fixture.componentInstance;
const div = fixture.nativeElement.querySelector('div');
const span = fixture.nativeElement.querySelector('span');
expect(() => fixture.detectChanges()).toThrowError(/throw_id/);
expect(div.id).toBeFalsy();
expectClass(span).toEqual({});
cmp.id = 'myId';
expect(() => fixture.detectChanges()).toThrowError(/throw_klass/);
expect(div.id).toEqual('myId');
expectClass(span).toEqual({});
cmp.klass = ['BAR'];
expect(() => fixture.detectChanges()).toThrowError(/throw_foo/);
expect(div.id).toEqual('myId');
expectClass(span).toEqual(ivyEnabled ? {BAR: true} : {});
cmp.foo = 'foo';
expect(() => fixture.detectChanges()).toThrowError(/class.myDir/);
expect(div.id).toEqual('myId');
expectClass(span).toEqual(ivyEnabled ? {BAR: true, foo: true} : {});
myDirHostBinding = true;
fixture.detectChanges();
expect(div.id).toEqual('myId');
expectClass(span).toEqual({BAR: true, foo: true, myDir: true});
});
it('should render inline style and class attribute values on the element before a directive is instantiated',
() => {
@Component({
template: `
<div directive-expecting-styling style="width:200px" class="abc xyz"></div>
`
})
class Cmp {
}
@Directive({selector: '[directive-expecting-styling]'})
class DirectiveExpectingStyling {
constructor(elm: ElementRef) {
const native = elm.nativeElement;
native.setAttribute('data-captured-width', native.style.width);
native.setAttribute('data-captured-classes', native.className);
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveExpectingStyling]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expect(element.style.width).toEqual('200px');
expect(element.getAttribute('data-captured-width')).toEqual('200px');
expect(element.className.trim()).toEqual('abc xyz');
expect(element.getAttribute('data-captured-classes')).toEqual('abc xyz');
});
it('should only render the same initial styling values once before a directive runs', () => {
@Component({
template: `
<div directive-expecting-styling style="width:200px" class="abc"></div>
`
})
class Cmp {
}
@Directive({selector: '[directive-expecting-styling]'})
class DirectiveExpectingStyling {
constructor(elm: ElementRef) {
const native = elm.nativeElement;
native.style.width = '300px';
native.classList.remove('abc');
}
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveExpectingStyling]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expect(element.style.width).toEqual('300px');
expect(element.classList.contains('abc')).toBeFalsy();
});
it('should ensure that static classes are assigned to ng-container elements and picked up for content projection',
() => {
@Component({
template: `
<project>
outer
<ng-container class="inner">
inner
</ng-container>
</project>
`
})
class MyApp {
}
@Component({
selector: 'project',
template: `
<div class="outer-area">
<ng-content></ng-content>
</div>
<div class="inner-area">
<ng-content select=".inner"></ng-content>
</div>
`
})
class ProjectCmp {
}
TestBed.configureTestingModule({declarations: [MyApp, ProjectCmp]});
const fixture = TestBed.createComponent(MyApp);
const element = fixture.nativeElement;
fixture.detectChanges();
const inner = element.querySelector('.inner-area');
expect(inner.textContent.trim()).toEqual('inner');
const outer = element.querySelector('.outer-area');
expect(outer.textContent.trim()).toEqual('outer');
});
it('should render initial styling for repeated nodes that a component host', () => {
@Component({
selector: '[comp]',
template: '',
})
class Comp {
}
@Component({
template: `
<ng-template ngFor [ngForOf]="items" let-item>
<p comp class="a">A</p>
</ng-template>
`
})
class App {
items = [1, 2, 3];
}
TestBed.configureTestingModule({
declarations: [App, Comp],
});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
expect(fixture.debugElement.queryAll(By.css('.a')).length).toBe(3);
});
it('should do nothing for empty style bindings', () => {
@Component({template: '<div [style.color]></div>'})
class App {
}
TestBed.configureTestingModule({declarations: [App]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML).toBe('<div></div>');
});
it('should do nothing for empty class bindings', () => {
@Component({template: '<div [class.is-open]></div>'})
class App {
}
TestBed.configureTestingModule({declarations: [App]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML).toBe('<div></div>');
});
it('should be able to bind zero', () => {
@Component({template: '<div #div [style.opacity]="opacity"></div>'})
class App {
@ViewChild('div') div!: ElementRef<HTMLElement>;
opacity = 0;
}
TestBed.configureTestingModule({declarations: [App]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
expect(fixture.componentInstance.div.nativeElement.style.opacity).toBe('0');
});
it('should be able to bind a SafeValue to backgroundImage', () => {
@Component({template: '<div [style.backgroundImage]="image"></div>'})
class Cmp {
image!: SafeStyle;
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const sanitizer: DomSanitizer = TestBed.inject(DomSanitizer);
fixture.componentInstance.image = sanitizer.bypassSecurityTrustStyle('url("#test")');
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div') as HTMLDivElement;
expect(div.style.backgroundImage).toBe('url("#test")');
onlyInIvy('perf counters').expectPerfCounters({
rendererSetStyle: 1,
tNode: 2,
});
});
it('should not write to the native element if a directive shadows the class input', () => {
// This ex is a bit contrived. In real apps, you might have a shared class that is extended
// both by components with host elements and by directives on template nodes. In that case, the
// host styles for the template directives should just be ignored.
@Directive({selector: 'ng-template[styleDir]', host: {'[style.display]': 'display'}})
class StyleDir {
display = 'block';
}
@Component({selector: 'app-comp', template: `<ng-template styleDir></ng-template>`})
class MyApp {
}
TestBed.configureTestingModule({declarations: [MyApp, StyleDir]});
TestBed.createComponent(MyApp).detectChanges();
});
it('should be able to bind a SafeValue to clip-path', () => {
@Component({template: '<div [style.clip-path]="path"></div>'})
class Cmp {
path!: SafeStyle;
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const sanitizer: DomSanitizer = TestBed.inject(DomSanitizer);
fixture.componentInstance.path = sanitizer.bypassSecurityTrustStyle('url("#test")');
fixture.detectChanges();
const html = fixture.nativeElement.innerHTML;
// Note that check the raw HTML, because (at the time of writing) the Node-based renderer
// that we use to run tests doesn't support `clip-path` in `CSSStyleDeclaration`.
expect(html).toMatch(/style=["|']clip-path:\s*url\(.*#test.*\)/);
});
it('should support interpolations inside a class binding', () => {
@Component({
template: `
<div class="a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f{{six}}g{{seven}}h{{eight}}i{{nine}}j"></div>
<div class="a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f{{six}}g{{seven}}h{{eight}}i"></div>
<div class="a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f{{six}}g{{seven}}h"></div>
<div class="a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f{{six}}g"></div>
<div class="a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f"></div>
<div class="a{{one}}b{{two}}c{{three}}d{{four}}e"></div>
<div class="a{{one}}b{{two}}c{{three}}d"></div>
<div class="a{{one}}b{{two}}c"></div>
<div class="a{{one}}b"></div>
<div class="{{one}}"></div>
`
})
class Cmp {
one = '1';
two = '2';
three = '3';
four = '4';
five = '5';
six = '6';
seven = '7';
eight = '8';
nine = '9';
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const instance = fixture.componentInstance;
fixture.detectChanges();
const divs = fixture.nativeElement.querySelectorAll('div');
expect(divs[0].getAttribute('class')).toBe('a1b2c3d4e5f6g7h8i9j');
expect(divs[1].getAttribute('class')).toBe('a1b2c3d4e5f6g7h8i');
expect(divs[2].getAttribute('class')).toBe('a1b2c3d4e5f6g7h');
expect(divs[3].getAttribute('class')).toBe('a1b2c3d4e5f6g');
expect(divs[4].getAttribute('class')).toBe('a1b2c3d4e5f');
expect(divs[5].getAttribute('class')).toBe('a1b2c3d4e');
expect(divs[6].getAttribute('class')).toBe('a1b2c3d');
expect(divs[7].getAttribute('class')).toBe('a1b2c');
expect(divs[8].getAttribute('class')).toBe('a1b');
expect(divs[9].getAttribute('class')).toBe('1');
instance.one = instance.two = instance.three = instance.four = instance.five = instance.six =
instance.seven = instance.eight = instance.nine = '';
fixture.detectChanges();
expect(divs[0].getAttribute('class')).toBe('abcdefghij');
expect(divs[1].getAttribute('class')).toBe('abcdefghi');
expect(divs[2].getAttribute('class')).toBe('abcdefgh');
expect(divs[3].getAttribute('class')).toBe('abcdefg');
expect(divs[4].getAttribute('class')).toBe('abcdef');
expect(divs[5].getAttribute('class')).toBe('abcde');
expect(divs[6].getAttribute('class')).toBe('abcd');
expect(divs[7].getAttribute('class')).toBe('abc');
expect(divs[8].getAttribute('class')).toBe('ab');
expect(divs[9].getAttribute('class')).toBeFalsy();
});
onlyInIvy('only Ivy supports style interpolation')
.it('should support interpolations inside a style binding', () => {
@Component({
template: `
<div style="content: &quot;a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f{{six}}g{{seven}}h{{eight}}i{{nine}}j&quot;"></div>
<div style="content: &quot;a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f{{six}}g{{seven}}h{{eight}}i&quot;"></div>
<div style="content: &quot;a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f{{six}}g{{seven}}h&quot;"></div>
<div style="content: &quot;a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f{{six}}g&quot;"></div>
<div style="content: &quot;a{{one}}b{{two}}c{{three}}d{{four}}e{{five}}f&quot;"></div>
<div style="content: &quot;a{{one}}b{{two}}c{{three}}d{{four}}e&quot;"></div>
<div style="content: &quot;a{{one}}b{{two}}c{{three}}d&quot;"></div>
<div style="content: &quot;a{{one}}b{{two}}c&quot;"></div>
<div style="content: &quot;a{{one}}b&quot;"></div>
<div style="{{self}}"></div>
`
})
class Cmp {
self = 'content: "self"';
one = '1';
two = '2';
three = '3';
four = '4';
five = '5';
six = '6';
seven = '7';
eight = '8';
nine = '9';
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const instance = fixture.componentInstance;
fixture.detectChanges();
const divs = fixture.nativeElement.querySelectorAll('div');
expect(divs[0].style.getPropertyValue('content')).toBe('"a1b2c3d4e5f6g7h8i9j"');
expect(divs[1].style.getPropertyValue('content')).toBe('"a1b2c3d4e5f6g7h8i"');
expect(divs[2].style.getPropertyValue('content')).toBe('"a1b2c3d4e5f6g7h"');
expect(divs[3].style.getPropertyValue('content')).toBe('"a1b2c3d4e5f6g"');
expect(divs[4].style.getPropertyValue('content')).toBe('"a1b2c3d4e5f"');
expect(divs[5].style.getPropertyValue('content')).toBe('"a1b2c3d4e"');
expect(divs[6].style.getPropertyValue('content')).toBe('"a1b2c3d"');
expect(divs[7].style.getPropertyValue('content')).toBe('"a1b2c"');
expect(divs[8].style.getPropertyValue('content')).toBe('"a1b"');
expect(divs[9].style.getPropertyValue('content')).toBe('"self"');
instance.one = instance.two = instance.three = instance.four = instance.five =
instance.six = instance.seven = instance.eight = instance.nine = instance.self = '';
fixture.detectChanges();
expect(divs[0].style.getPropertyValue('content')).toBe('"abcdefghij"');
expect(divs[1].style.getPropertyValue('content')).toBe('"abcdefghi"');
expect(divs[2].style.getPropertyValue('content')).toBe('"abcdefgh"');
expect(divs[3].style.getPropertyValue('content')).toBe('"abcdefg"');
expect(divs[4].style.getPropertyValue('content')).toBe('"abcdef"');
expect(divs[5].style.getPropertyValue('content')).toBe('"abcde"');
expect(divs[6].style.getPropertyValue('content')).toBe('"abcd"');
expect(divs[7].style.getPropertyValue('content')).toBe('"abc"');
expect(divs[8].style.getPropertyValue('content')).toBe('"ab"');
expect(divs[9].style.getPropertyValue('content')).toBeFalsy();
});
it('should support interpolations inside a class binding when other classes are present', () => {
@Component({template: '<div class="zero i-{{one}} {{two}} three"></div>'})
class Cmp {
one = 'one';
two = 'two';
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const classList = fixture.nativeElement.querySelector('div').classList;
expect(classList).toContain('zero');
expect(classList).toContain('i-one');
expect(classList).toContain('two');
expect(classList).toContain('three');
fixture.componentInstance.one = fixture.componentInstance.two = '';
fixture.detectChanges();
expect(classList).toContain('zero');
expect(classList).toContain('i-');
expect(classList).toContain('three');
expect(classList).not.toContain('i-one');
expect(classList).not.toContain('two');
});
it('should support interpolations inside a style property binding', () => {
@Component({
template: `
<div style.font-family="f{{one}}{{two}}{{three}}{{four}}{{five}}{{six}}{{seven}}{{eight}}{{nine}}"></div>
<div style.font-family="f{{one}}{{two}}{{three}}{{four}}{{five}}{{six}}{{seven}}{{eight}}"></div>
<div style.font-family="f{{one}}{{two}}{{three}}{{four}}{{five}}{{six}}{{seven}}"></div>
<div style.font-family="f{{one}}{{two}}{{three}}{{four}}{{five}}{{six}}"></div>
<div style.font-family="f{{one}}{{two}}{{three}}{{four}}{{five}}"></div>
<div style.font-family="f{{one}}{{two}}{{three}}{{four}}"></div>
<div style.font-family="f{{one}}{{two}}{{three}}"></div>
<div style.font-family="f{{one}}{{two}}"></div>
<div style.font-family="f{{one}}"></div>
<div style.width="{{singleBinding}}"></div>
`
})
class Cmp {
singleBinding: string|null = '1337px';
one = 1;
two = 2;
three = 3;
four = 4;
five = 5;
six = 6;
seven = 7;
eight = 8;
nine = 9;
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const instance = fixture.componentInstance;
fixture.detectChanges();
const divs: NodeListOf<HTMLElement> = fixture.nativeElement.querySelectorAll('div');
expect(divs[0].style.fontFamily).toBe('f123456789');
expect(divs[1].style.fontFamily).toBe('f12345678');
expect(divs[2].style.fontFamily).toBe('f1234567');
expect(divs[3].style.fontFamily).toBe('f123456');
expect(divs[4].style.fontFamily).toBe('f12345');
expect(divs[5].style.fontFamily).toBe('f1234');
expect(divs[6].style.fontFamily).toBe('f123');
expect(divs[7].style.fontFamily).toBe('f12');
expect(divs[8].style.fontFamily).toBe('f1');
expect(divs[9].style.width).toBe('1337px');
instance.singleBinding = null;
instance.one = instance.two = instance.three = instance.four = instance.five = instance.six =
instance.seven = instance.eight = instance.nine = 1;
fixture.detectChanges();
expect(divs[0].style.fontFamily).toBe('f111111111');
expect(divs[1].style.fontFamily).toBe('f11111111');
expect(divs[2].style.fontFamily).toBe('f1111111');
expect(divs[3].style.fontFamily).toBe('f111111');
expect(divs[4].style.fontFamily).toBe('f11111');
expect(divs[5].style.fontFamily).toBe('f1111');
expect(divs[6].style.fontFamily).toBe('f111');
expect(divs[7].style.fontFamily).toBe('f11');
expect(divs[8].style.fontFamily).toBe('f1');
expect(divs[9].style.width).toBeFalsy();
});
it('should support interpolations when a style property has a unit suffix', () => {
@Component({template: '<div style.width.px="{{one}}{{three}}{{three}}7"></div>'})
class Cmp {
one = 1;
three = 3;
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(div.style.width).toBe('1337px');
fixture.componentInstance.one = 2;
fixture.componentInstance.three = 6;
fixture.detectChanges();
expect(div.style.width).toBe('2667px');
});
it('should not write to a `class` input binding in the event that there is no static class value',
() => {
let capturedClassBindingCount = 0;
let capturedClassBindingValue: string|null|undefined = undefined;
let capturedMyClassBindingCount = 0;
let capturedMyClassBindingValue: string|null|undefined = undefined;
@Component({template: '<div [class]="c" [my-class-dir]="x"></div>'})
class Cmp {
c: any = null;
x = 'foo';
}
@Directive({selector: '[my-class-dir]'})
class MyClassDir {
@Input('class')
set classVal(v: string) {
capturedClassBindingCount++;
capturedClassBindingValue = v;
}
@Input('my-class-dir')
set myClassVal(v: string) {
capturedMyClassBindingCount++;
capturedMyClassBindingValue = v;
}
}
TestBed.configureTestingModule({declarations: [Cmp, MyClassDir]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
expect(capturedClassBindingCount).toEqual(1);
expect(capturedClassBindingValue as any).toEqual(null);
expect(capturedMyClassBindingCount).toEqual(1);
expect(capturedMyClassBindingValue!).toEqual('foo');
fixture.componentInstance.c = 'dynamic-value';
fixture.detectChanges();
expect(capturedClassBindingCount).toEqual(2);
expect(capturedClassBindingValue!).toEqual('dynamic-value');
expect(capturedMyClassBindingCount).toEqual(1);
expect(capturedMyClassBindingValue!).toEqual('foo');
fixture.componentInstance.c = null;
fixture.detectChanges();
expect(capturedClassBindingCount).toEqual(3);
expect(capturedClassBindingValue as any).toEqual(null);
expect(capturedMyClassBindingCount).toEqual(1);
expect(capturedMyClassBindingValue!).toEqual('foo');
fixture.componentInstance.c = '';
fixture.detectChanges();
expect(capturedClassBindingCount).toEqual(4);
expect(capturedClassBindingValue as any).toEqual('');
expect(capturedMyClassBindingCount).toEqual(1);
expect(capturedMyClassBindingValue!).toEqual('foo');
});
it('should write to [class] binding during `update` mode if there is an instantiation-level value',
() => {
let capturedClassBindingCount = 0;
let capturedClassBindingValue: string|null|undefined = undefined;
@Component({template: '<div [class]="c" my-class-dir></div>'})
class Cmp {
c: any = 'bar';
}
@Directive({selector: '[my-class-dir]'})
class MyClassDir {
@Input('class')
set classVal(v: string) {
capturedClassBindingCount++;
capturedClassBindingValue = v;
}
}
TestBed.configureTestingModule({declarations: [Cmp, MyClassDir]});
const fixture = TestBed.createComponent(Cmp);
expect(capturedClassBindingCount).toEqual(0);
fixture.detectChanges();
expect(capturedClassBindingCount).toEqual(1);
expect(capturedClassBindingValue as any).toEqual('bar');
fixture.componentInstance.c = 'dynamic-bar';
fixture.detectChanges();
expect(capturedClassBindingCount).toEqual(2);
expect(capturedClassBindingValue!).toEqual('dynamic-bar');
});
it('should write to a `class` input binding if there is a static class value', () => {
let capturedClassBindingCount = 0;
let capturedClassBindingValue: string|null = null;
let capturedMyClassBindingCount = 0;
let capturedMyClassBindingValue: string|null = null;
@Component({template: '<div class="static-val" [my-class-dir]="x"></div>'})
class Cmp {
x = 'foo';
}
@Directive({selector: '[my-class-dir]'})
class MyClassDir {
@Input('class')
set classVal(v: string) {
capturedClassBindingCount++;
capturedClassBindingValue = v;
}
@Input('my-class-dir')
set myClassVal(v: string) {
capturedMyClassBindingCount++;
capturedMyClassBindingValue = v;
}
}
TestBed.configureTestingModule({declarations: [Cmp, MyClassDir]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
expect(capturedClassBindingValue!).toEqual('static-val');
expect(capturedClassBindingCount).toEqual(1);
expect(capturedMyClassBindingValue!).toEqual('foo');
expect(capturedMyClassBindingCount).toEqual(1);
});
it('should write to a `className` input binding', () => {
@Component({
selector: 'comp',
template: `{{className}}`,
})
class Comp {
@Input() className: string = '';
}
@Component({
template: `<comp [className]="'my-className'"></comp>`,
})
class App {
}
TestBed.configureTestingModule({declarations: [Comp, App]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
expect(fixture.debugElement.nativeElement.firstChild.innerHTML).toBe('my-className');
});
onlyInIvy('only ivy combines static and dynamic class-related attr values')
.it('should write combined class attribute and class binding to the class input', () => {
@Component({
selector: 'comp',
template: `{{className}}`,
})
class Comp {
@Input('class') className: string = '';
}
@Component({
template: `<comp class="static" [class]="'my-className'"></comp>`,
})
class App {
}
TestBed.configureTestingModule({declarations: [Comp, App]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
expect(fixture.debugElement.nativeElement.firstChild.innerHTML).toBe('static my-className');
});
onlyInIvy('only ivy persists static class/style attrs with their binding counterparts')
.it('should write to a `class` input binding if there is a static class value and there is a binding value',
() => {
let capturedClassBindingCount = 0;
let capturedClassBindingValue: string|null = null;
let capturedMyClassBindingCount = 0;
let capturedMyClassBindingValue: string|null = null;
@Component({template: '<div class="static-val" [class]="c" [my-class-dir]="x"></div>'})
class Cmp {
c: any = null;
x: any = 'foo';
}
@Directive({selector: '[my-class-dir]'})
class MyClassDir {
@Input('class')
set classVal(v: string) {
capturedClassBindingCount++;
capturedClassBindingValue = v;
}
@Input('my-class-dir')
set myClassVal(v: string) {
capturedMyClassBindingCount++;
capturedMyClassBindingValue = v;
}
}
TestBed.configureTestingModule({declarations: [Cmp, MyClassDir]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
expect(capturedClassBindingCount)
.toEqual(
2
// '2' is not ideal as '1' would be preferred.
// The reason for two writes is that one is for the static
// `class="static-val"` and one for `[class]="c"`. This means that
// `class="static-val"` is written during the create block which is not ideal.
// To do this correctly we would have to delay the `class="static-val"` until
// the update block, but that would be expensive since it would require that we
// would check if we possibly have this situation on every `advance()`
// instruction. We don't think this is worth it, and we are just going to live
// with this.
);
expect(capturedClassBindingValue!).toEqual('static-val');
expect(capturedMyClassBindingCount).toEqual(1);
expect(capturedMyClassBindingValue!).toEqual('foo');
capturedClassBindingCount = 0;
fixture.componentInstance.c = 'dynamic-val';
fixture.detectChanges();
expect(capturedClassBindingCount).toEqual(1);
expect(capturedClassBindingValue!).toEqual('static-val dynamic-val');
expect(capturedMyClassBindingCount).toEqual(1);
expect(capturedMyClassBindingValue!).toEqual('foo');
});
onlyInIvy('only ivy balances styling across directives and component host bindings')
.it('should allow multiple directives to set dynamic and static classes independent of one another',
() => {
@Component({
template: `
<div dir-one dir-two></div>
`
})
class Cmp {
}
@Directive({selector: '[dir-one]', host: {'[class.dir-one]': 'dirOneExp'}})
class DirOne {
dirOneExp = true;
}
@Directive({selector: '[dir-two]', host: {'class': 'dir-two'}})
class DirTwo {
}
TestBed.configureTestingModule({declarations: [Cmp, DirOne, DirTwo]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expect(element.classList.contains('dir-one')).toBeTruthy();
expect(element.classList.contains('dir-two')).toBeTruthy();
});
describe('NgClass', () => {
// We had a bug where NgClass would not allocate sufficient slots for host bindings,
// so it would overwrite information about other directives nearby. This test checks
// that TestDir's injector is not overwritten by NgClass, so TestDir should still
// be found by DI when ChildDir is instantiated.
it('should not overwrite other directive info when using NgClass', () => {
@Directive({selector: '[test-dir]'})
class TestDir {
}
@Directive({selector: '[child-dir]'})
class ChildDir {
constructor(public parent: TestDir) {}
}
@Component({
selector: 'app',
template: `
<div class="my-class" [ngClass]="classMap" test-dir>
<div *ngIf="showing" child-dir>Hello</div>
</div>
`
})
class AppComponent {
classMap = {'with-button': true};
showing = false;
}
TestBed.configureTestingModule({declarations: [AppComponent, TestDir, ChildDir]});
const fixture = TestBed.createComponent(AppComponent);
fixture.detectChanges();
const testDirDiv = fixture.debugElement.nativeElement.querySelector('div');
expect(testDirDiv.classList).toContain('with-button');
expect(fixture.debugElement.nativeElement.textContent).not.toContain('Hello');
fixture.componentInstance.classMap = {'with-button': false};
fixture.componentInstance.showing = true;
fixture.detectChanges();
const childDir = fixture.debugElement.query(By.directive(ChildDir)).injector.get(ChildDir);
expect(childDir.parent).toBeAnInstanceOf(TestDir);
expect(testDirDiv.classList).not.toContain('with-button');
expect(fixture.debugElement.nativeElement.textContent).toContain('Hello');
});
});
it('should be able to name inputs starting with `class` or `style`', () => {
@Directive({selector: '[dir]'})
class Dir {
@Input('classesInSchool') classes = '';
@Input('styleOfClothing') style = '';
}
@Component({
template: '<span dir [classesInSchool]="classes" [styleOfClothing]="style"></span>',
})
class App {
@ViewChild(Dir) dir!: Dir;
classes = 'math';
style = '80s';
}
TestBed.configureTestingModule({declarations: [App, Dir]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
const directive = fixture.componentInstance.dir;
expect(directive.classes).toBe('math');
expect(directive.style).toBe('80s');
});
it('should be able to bind to `className`', () => {
@Component({template: ''})
class App {
@HostBinding('className') klass = 'one two';
}
TestBed.configureTestingModule({declarations: [App]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
const classList = fixture.nativeElement.classList;
expect(classList.contains('one')).toBe(true);
expect(classList.contains('two')).toBe(true);
});
onlyInIvy('ivy resolves styling across directives, components and templates in unison')
.it('should apply single property styles/classes to the element and default to any static styling values',
() => {
@Component({
template: `
<div [style.width]="w"
[style.height]="h"
[style.opacity]="o"
style="width:200px; height:200px;"
[class.abc]="abc"
[class.xyz]="xyz"></div>
`
})
class Cmp {
w: string|null|undefined = '100px';
h: string|null|undefined = '100px';
o: string|null|undefined = '0.5';
abc = true;
xyz = false;
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expect(element.style.width).toEqual('100px');
expect(element.style.height).toEqual('100px');
expect(element.style.opacity).toEqual('0.5');
expect(element.classList.contains('abc')).toBeTruthy();
expect(element.classList.contains('xyz')).toBeFalsy();
fixture.componentInstance.w = undefined;
fixture.componentInstance.h = undefined;
fixture.componentInstance.o = undefined;
fixture.componentInstance.abc = false;
fixture.componentInstance.xyz = true;
fixture.detectChanges();
expect(element.style.width).toEqual('200px');
expect(element.style.height).toEqual('200px');
expect(element.style.opacity).toBeFalsy();
expect(element.classList.contains('abc')).toBeFalsy();
expect(element.classList.contains('xyz')).toBeTruthy();
fixture.componentInstance.w = null;
fixture.componentInstance.h = null;
fixture.componentInstance.o = null;
fixture.detectChanges();
expect(element.style.width).toBeFalsy();
expect(element.style.height).toBeFalsy();
expect(element.style.opacity).toBeFalsy();
});
onlyInIvy('ivy resolves styling across directives, components and templates in unison')
.it('should apply single style/class across the template and directive host bindings', () => {
@Directive({selector: '[dir-that-sets-width]'})
class DirThatSetsWidthDirective {
@Input('dir-that-sets-width') @HostBinding('style.width') public width: string = '';
}
@Directive({selector: '[another-dir-that-sets-width]', host: {'[style.width]': 'width'}})
class AnotherDirThatSetsWidthDirective {
@Input('another-dir-that-sets-width') public width: string = '';
}
@Component({
template: `
<div [style.width]="w0"
[dir-that-sets-width]="w1"
[another-dir-that-sets-width]="w2">
`
})
class Cmp {
w0: string|null|undefined = null;
w1: string|null|undefined = null;
w2: string|null|undefined = null;
}
TestBed.configureTestingModule(
{declarations: [Cmp, DirThatSetsWidthDirective, AnotherDirThatSetsWidthDirective]});
const fixture = TestBed.createComponent(Cmp);
fixture.componentInstance.w0 = '100px';
fixture.componentInstance.w1 = '200px';
fixture.componentInstance.w2 = '300px';
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expect(element.style.width).toEqual('100px');
fixture.componentInstance.w0 = undefined;
fixture.detectChanges();
expect(element.style.width).toEqual('300px');
fixture.componentInstance.w2 = undefined;
fixture.detectChanges();
expect(element.style.width).toEqual('200px');
fixture.componentInstance.w1 = undefined;
fixture.detectChanges();
expect(element.style.width).toBeFalsy();
fixture.componentInstance.w2 = '400px';
fixture.detectChanges();
expect(element.style.width).toEqual('400px');
fixture.componentInstance.w1 = '500px';
fixture.componentInstance.w0 = '600px';
fixture.detectChanges();
expect(element.style.width).toEqual('600px');
});
onlyInIvy('ivy resolves styling across directives, components and templates in unison')
.it('should only run stylingFlush once when there are no collisions between styling properties',
() => {
@Directive({selector: '[dir-with-styling]'})
class DirWithStyling {
@HostBinding('style.font-size') public fontSize = '100px';
}
@Component({selector: 'comp-with-styling'})
class CompWithStyling {
@HostBinding('style.width') public width = '900px';
@HostBinding('style.height') public height = '900px';
}
@Component({
template: `
<comp-with-styling
[style.opacity]="opacity"
dir-with-styling>...</comp-with-styling>
`
})
class Cmp {
opacity: string|null = '0.5';
@ViewChild(CompWithStyling, {static: true})
compWithStyling: CompWithStyling|null = null;
@ViewChild(DirWithStyling, {static: true}) dirWithStyling: DirWithStyling|null = null;
}
TestBed.configureTestingModule({declarations: [Cmp, DirWithStyling, CompWithStyling]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const component = fixture.componentInstance;
const element = fixture.nativeElement.querySelector('comp-with-styling');
expect(element.style.opacity).toEqual('0.5');
expect(element.style.width).toEqual('900px');
expect(element.style.height).toEqual('900px');
expect(element.style.fontSize).toEqual('100px');
// once for the template flush and again for the host bindings
expect(ngDevMode!.rendererSetStyle).toEqual(4);
ngDevModeResetPerfCounters();
component.opacity = '0.6';
component.compWithStyling!.height = '100px';
component.compWithStyling!.width = '100px';
component.dirWithStyling!.fontSize = '50px';
fixture.detectChanges();
expect(element.style.opacity).toEqual('0.6');
expect(element.style.width).toEqual('100px');
expect(element.style.height).toEqual('100px');
expect(element.style.fontSize).toEqual('50px');
// once for the template flush and again for the host bindings
expect(ngDevMode!.rendererSetStyle).toEqual(4);
});
onlyInIvy('ivy resolves styling across directives, components and templates in unison')
.it('should combine all styling across the template, directive and component host bindings',
() => {
@Directive({selector: '[dir-with-styling]'})
class DirWithStyling {
@HostBinding('style.color') public color = 'red';
@HostBinding('style.font-size') public fontSize = '100px';
@HostBinding('class.dir') public dirClass = true;
}
@Component({selector: 'comp-with-styling'})
class CompWithStyling {
@HostBinding('style.width') public width = '900px';
@HostBinding('style.height') public height = '900px';
@HostBinding('class.comp') public compClass = true;
}
@Component({
template: `
<comp-with-styling
[style.opacity]="opacity"
[style.width]="width"
[class.tpl]="tplClass"
dir-with-styling>...</comp-with-styling>
`
})
class Cmp {
opacity: string|null|undefined = '0.5';
width: string|null|undefined = 'auto';
tplClass = true;
}
TestBed.configureTestingModule({declarations: [Cmp, DirWithStyling, CompWithStyling]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('comp-with-styling');
expectStyle(element).toEqual({
'color': 'red',
'font-size': '100px',
'height': '900px',
'opacity': '0.5',
'width': 'auto',
});
expectClass(element).toEqual({
'dir': true,
'comp': true,
'tpl': true,
});
fixture.componentInstance.width = undefined;
fixture.componentInstance.opacity = undefined;
fixture.componentInstance.tplClass = false;
fixture.detectChanges();
expectStyle(element).toEqual(
{'color': 'red', 'width': '900px', 'height': '900px', 'font-size': '100px'});
expectClass(element).toEqual({
'dir': true,
'comp': true,
});
fixture.componentInstance.width = null;
fixture.componentInstance.opacity = null;
fixture.detectChanges();
expectStyle(element).toEqual({'color': 'red', 'height': '900px', 'font-size': '100px'});
});
onlyInIvy('ivy resolves styling across directives, components and templates in unison')
.it('should properly apply styling across sub and super class directive host bindings',
() => {
@Directive({selector: '[super-class-dir]'})
class SuperClassDirective {
@HostBinding('style.width') public w1 = '100px';
}
@Component({selector: '[sub-class-dir]'})
class SubClassDirective extends SuperClassDirective {
@HostBinding('style.width') public w2 = '200px';
}
@Component({
template: `
<div sub-class-dir [style.width]="w3"></div>
`
})
class Cmp {
w3: string|null|undefined = '300px';
}
TestBed.configureTestingModule(
{declarations: [Cmp, SuperClassDirective, SubClassDirective]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expectStyle(element).toEqual({
'width': '300px',
});
fixture.componentInstance.w3 = null;
fixture.detectChanges();
expectStyle(element).toEqual({});
fixture.componentInstance.w3 = undefined;
fixture.detectChanges();
expectStyle(element).toEqual({
'width': '200px',
});
});
onlyInIvy('only ivy has style debugging support')
.it('should apply map-based style and class entries', () => {
@Component({template: '<div [style]="s" [class]="c"></div>'})
class Cmp {
public c: {[key: string]: any}|null = null;
updateClasses(classes: string) {
const c = this.c || (this.c = {});
Object.keys(this.c).forEach(className => {
c[className] = false;
});
classes.split(/\s+/).forEach(className => {
c[className] = true;
});
}
public s: {[key: string]: any}|null = null;
updateStyles(prop: string, value: string|number|null) {
const s = this.s || (this.s = {});
Object.assign(s, {[prop]: value});
}
reset() {
this.s = null;
this.c = null;
}
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
comp.updateStyles('width', '100px');
comp.updateStyles('height', '200px');
comp.updateClasses('abc');
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expectStyle(element).toEqual({width: '100px', height: '200px'});
expectClass(element).toEqual({abc: true});
comp.reset();
comp.updateStyles('width', '500px');
comp.updateStyles('height', null);
comp.updateClasses('def');
fixture.detectChanges();
expectStyle(element).toEqual({width: '500px'});
expectClass(element).toEqual({def: true});
});
onlyInIvy('ivy resolves styling across directives, components and templates in unison')
.it('should resolve styling collisions across templates, directives and components for prop and map-based entries',
() => {
@Directive({selector: '[dir-that-sets-styling]'})
class DirThatSetsStyling {
@HostBinding('style') public map: any = {color: 'red', width: '777px'};
}
@Component({
template: `
<div [style.width]="width"
[style]="map"
style="width:200px; font-size:99px"
dir-that-sets-styling
#dir
[class.xyz]="xyz"></div>
`
})
class Cmp {
map: any = {width: '111px', opacity: '0.5'};
width: string|null|undefined = '555px';
@ViewChild('dir', {read: DirThatSetsStyling, static: true}) dir!: DirThatSetsStyling;
}
TestBed.configureTestingModule({declarations: [Cmp, DirThatSetsStyling]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expectStyle(element).toEqual({
'width': '555px',
'color': 'red',
'font-size': '99px',
'opacity': '0.5',
});
comp.width = undefined;
fixture.detectChanges();
expectStyle(element).toEqual({
'width': '111px',
'color': 'red',
'font-size': '99px',
'opacity': '0.5',
});
comp.map = null;
fixture.detectChanges();
expectStyle(element).toEqual({
'width': '200px',
'color': 'red',
'font-size': '99px',
});
comp.dir.map = null;
fixture.detectChanges();
expectStyle(element).toEqual({
'width': '200px',
'font-size': '99px',
});
});
onlyInIvy('ivy resolves styling across directives, components and templates in unison')
.it('should only apply each styling property once per CD across templates, components, directives',
() => {
@Directive(
{selector: '[dir-that-sets-styling]', host: {'style': 'width:0px; height:0px'}})
class DirThatSetsStyling {
@HostBinding('style') public map: any = {width: '999px', height: '999px'};
}
@Component({
template: `
<div #dir
[style.width]="width"
[style.height]="height"
[style]="map"
dir-that-sets-styling></div>
`
})
class Cmp {
width: string|null|undefined = '111px';
height: string|null|undefined = '111px';
map: any = {width: '555px', height: '555px'};
@ViewChild('dir', {read: DirThatSetsStyling, static: true}) dir!: DirThatSetsStyling;
}
TestBed.configureTestingModule({declarations: [Cmp, DirThatSetsStyling]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
ngDevModeResetPerfCounters();
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
assertStyleCounters(4, 0);
assertStyle(element, 'width', '111px');
assertStyle(element, 'height', '111px');
comp.width = '222px';
ngDevModeResetPerfCounters();
fixture.detectChanges();
assertStyleCounters(1, 0);
assertStyle(element, 'width', '222px');
assertStyle(element, 'height', '111px');
comp.height = '222px';
ngDevModeResetPerfCounters();
fixture.detectChanges();
assertStyleCounters(1, 0);
assertStyle(element, 'width', '222px');
assertStyle(element, 'height', '222px');
comp.width = undefined;
ngDevModeResetPerfCounters();
fixture.detectChanges();
assertStyleCounters(1, 0);
assertStyle(element, 'width', '555px');
assertStyle(element, 'height', '222px');
comp.width = '123px';
comp.height = '123px';
ngDevModeResetPerfCounters();
fixture.detectChanges();
assertStyle(element, 'width', '123px');
assertStyle(element, 'height', '123px');
comp.map = {};
ngDevModeResetPerfCounters();
fixture.detectChanges();
// No change, hence no write
assertStyleCounters(0, 0);
assertStyle(element, 'width', '123px');
assertStyle(element, 'height', '123px');
comp.width = undefined;
ngDevModeResetPerfCounters();
fixture.detectChanges();
assertStyleCounters(1, 0);
assertStyle(element, 'width', '999px');
assertStyle(element, 'height', '123px');
comp.dir.map = null;
ngDevModeResetPerfCounters();
fixture.detectChanges();
// the width is only applied once
assertStyleCounters(1, 0);
assertStyle(element, 'width', '0px');
assertStyle(element, 'height', '123px');
comp.dir.map = {width: '1000px', height: '1100px', color: 'red'};
ngDevModeResetPerfCounters();
fixture.detectChanges();
assertStyleCounters(2, 0);
assertStyle(element, 'width', '1000px');
assertStyle(element, 'height', '123px');
assertStyle(element, 'color', 'red');
comp.height = undefined;
ngDevModeResetPerfCounters();
fixture.detectChanges();
// height gets applied twice and all other
// values get applied
assertStyleCounters(1, 0);
assertStyle(element, 'width', '1000px');
assertStyle(element, 'height', '1100px');
assertStyle(element, 'color', 'red');
comp.map = {color: 'blue', width: '2000px', opacity: '0.5'};
ngDevModeResetPerfCounters();
fixture.detectChanges();
assertStyleCounters(3, 0);
assertStyle(element, 'width', '2000px');
assertStyle(element, 'height', '1100px');
assertStyle(element, 'color', 'blue');
assertStyle(element, 'opacity', '0.5');
comp.map = {color: 'blue', width: '2000px'};
ngDevModeResetPerfCounters();
fixture.detectChanges();
// all four are applied because the map was altered
assertStyleCounters(0, 1);
assertStyle(element, 'width', '2000px');
assertStyle(element, 'height', '1100px');
assertStyle(element, 'color', 'blue');
assertStyle(element, 'opacity', '');
});
onlyInIvy('only ivy has [style.prop] support')
.it('should not sanitize style values before writing them', () => {
@Component({
template: `
<div [style.width]="widthExp"
[style.background-image]="bgImageExp"></div>
`
})
class Cmp {
widthExp = '';
bgImageExp = '';
styleMapExp: any = {};
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
comp.bgImageExp = 'url("javascript:img")';
fixture.detectChanges();
expect(getSortedStyle(div)).toContain('javascript:img');
// Prove that bindings work.
comp.widthExp = '789px';
comp.bgImageExp = bypassSanitizationTrustStyle(comp.bgImageExp) as string;
fixture.detectChanges();
expect(div.style.getPropertyValue('background-image')).toEqual('url("javascript:img")');
expect(div.style.getPropertyValue('width')).toEqual('789px');
});
onlyInIvy('only ivy has [style] support')
.it('should not sanitize style values before writing them', () => {
@Component({
template: `
<div [style.width]="widthExp"
[style]="styleMapExp"></div>
`
})
class Cmp {
widthExp = '';
styleMapExp: {[key: string]: any} = {};
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
comp.styleMapExp['background-image'] = 'url("javascript:img")';
fixture.detectChanges();
expect(getSortedStyle(div)).not.toContain('javascript');
// Prove that bindings work.
comp.widthExp = '789px';
comp.styleMapExp = {
'background-image': bypassSanitizationTrustStyle(comp.styleMapExp['background-image'])
};
fixture.detectChanges();
expect(div.style.getPropertyValue('background-image')).toEqual('url("javascript:img")');
expect(div.style.getPropertyValue('width')).toEqual('789px');
});
it('should apply a unit to a style before writing it', () => {
@Component({
template: `
<div [style.width.px]="widthExp"
[style.height.em]="heightExp"></div>
`
})
class Cmp {
widthExp: string|number|null = '';
heightExp: string|number|null = '';
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
comp.widthExp = '200';
comp.heightExp = 10;
fixture.detectChanges();
expect(getSortedStyle(div)).toEqual('height: 10em; width: 200px;');
comp.widthExp = 0;
comp.heightExp = null;
fixture.detectChanges();
expect(getSortedStyle(div)).toEqual('width: 0px;');
});
it('should be able to bind a SafeValue to clip-path', () => {
@Component({template: '<div [style.clip-path]="path"></div>'})
class Cmp {
path!: SafeStyle;
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const sanitizer: DomSanitizer = TestBed.inject(DomSanitizer);
fixture.componentInstance.path = sanitizer.bypassSecurityTrustStyle('url("#test")');
fixture.detectChanges();
const html = fixture.nativeElement.innerHTML;
// Note that check the raw HTML, because (at the time of writing) the Node-based renderer
// that we use to run tests doesn't support `clip-path` in `CSSStyleDeclaration`.
expect(html).toMatch(/style=["|']clip-path:\s*url\(.*#test.*\)/);
});
it('should handle values wrapped into SafeValue', () => {
@Component({
template: `
<!-- Verify sanitizable style prop values wrapped in SafeValue -->
<div [style.background]="getBackgroundSafe()"></div>
<!-- Verify regular style prop values wrapped in SafeValue -->
<p [style.width]="getWidthSafe()" [style.height]="getHeightSafe()"></p>
<!-- Verify regular style prop values not wrapped in SafeValue -->
<span [style.color]="getColorUnsafe()"></span>
`,
})
class MyComp {
constructor(private sanitizer: DomSanitizer) {}
public width: string = 'calc(20%)';
public height: string = '10px';
public background: string = '1.png';
public color: string = 'red';
private getSafeStyle(value: string) {
return this.sanitizer.bypassSecurityTrustStyle(value);
}
getBackgroundSafe() {
return this.getSafeStyle(`url("/${this.background}")`);
}
getWidthSafe() {
return this.getSafeStyle(this.width);
}
getHeightSafe() {
return this.getSafeStyle(this.height);
}
getColorUnsafe() {
return this.color;
}
}
TestBed.configureTestingModule({
imports: [CommonModule],
declarations: [MyComp],
});
const fixture = TestBed.createComponent(MyComp);
fixture.detectChanges();
const comp = fixture.componentInstance;
const div = fixture.nativeElement.querySelector('div');
const p = fixture.nativeElement.querySelector('p');
const span = fixture.nativeElement.querySelector('span');
expect(div.style.background).toContain('url("/1.png")');
expect(p.style.width).toBe('calc(20%)');
expect(p.style.height).toBe('10px');
expect(span.style.color).toBe('red');
comp.background = '2.png';
comp.width = '5px';
comp.height = '100%';
comp.color = 'green';
fixture.detectChanges();
expect(div.style.background).toContain('url("/2.png")');
expect(p.style.width).toBe('5px');
expect(p.style.height).toBe('100%');
expect(span.style.color).toBe('green');
});
onlyInIvy('only ivy has style/class bindings debugging support')
.it('should evaluate follow-up [style] maps even if a former map is null', () => {
@Directive({selector: '[dir-with-styling]'})
class DirWithStyleMap {
@HostBinding('style') public styleMap: any = {color: 'red'};
}
@Directive({selector: '[dir-with-styling-part2]'})
class DirWithStyleMapPart2 {
@HostBinding('style') public styleMap: any = {width: '200px'};
}
@Component({
template: `
<div #div
[style]="map"
dir-with-styling
dir-with-styling-part2></div>
`
})
class Cmp {
map: any = null;
@ViewChild('div', {read: DirWithStyleMap, static: true}) dir1!: DirWithStyleMap;
@ViewChild('div', {read: DirWithStyleMapPart2, static: true}) dir2!: DirWithStyleMapPart2;
}
TestBed.configureTestingModule(
{declarations: [Cmp, DirWithStyleMap, DirWithStyleMapPart2]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expectStyle(element).toEqual({
color: 'red',
width: '200px',
});
});
onlyInIvy('only ivy has style/class bindings debugging support')
.it('should evaluate initial style/class values on a list of elements that changes', () => {
@Component({
template: `
<div *ngFor="let item of items"
class="initial-class item-{{ item }}">
{{ item }}
</div>
`
})
class Cmp {
items = [1, 2, 3];
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
fixture.detectChanges();
function getItemElements(): HTMLElement[] {
return [].slice.call(fixture.nativeElement.querySelectorAll('div'));
}
function getItemClasses(): string[] {
return getItemElements().map(e => e.className).sort().join(' ').split(' ');
}
expect(getItemElements().length).toEqual(3);
expect(getItemClasses()).toEqual([
'initial-class',
'item-1',
'initial-class',
'item-2',
'initial-class',
'item-3',
]);
comp.items = [2, 4, 6, 8];
fixture.detectChanges();
expect(getItemElements().length).toEqual(4);
expect(getItemClasses()).toEqual([
'initial-class',
'item-2',
'initial-class',
'item-4',
'initial-class',
'item-6',
'initial-class',
'item-8',
]);
});
onlyInIvy('only ivy has style/class bindings debugging support')
.it('should create and update multiple class bindings across multiple elements in a template',
() => {
@Component({
template: `
<header class="header">header</header>
<div *ngFor="let item of items" class="item item-{{ item }}">
{{ item }}
</div>
<footer class="footer">footer</footer>
`
})
class Cmp {
items = [1, 2, 3];
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
fixture.detectChanges();
function getItemElements(): HTMLElement[] {
return [].slice.call(fixture.nativeElement.querySelectorAll('div'));
}
function getItemClasses(): string[] {
return getItemElements().map(e => e.className).sort().join(' ').split(' ');
}
const header = fixture.nativeElement.querySelector('header');
expect(header.classList.contains('header'));
const footer = fixture.nativeElement.querySelector('footer');
expect(footer.classList.contains('footer'));
expect(getItemElements().length).toEqual(3);
expect(getItemClasses()).toEqual([
'item',
'item-1',
'item',
'item-2',
'item',
'item-3',
]);
});
onlyInIvy('only ivy has style/class bindings debugging support')
.it('should understand multiple directives which contain initial classes', () => {
@Directive({selector: 'dir-one'})
class DirOne {
@HostBinding('class') public className = 'dir-one';
}
@Directive({selector: 'dir-two'})
class DirTwo {
@HostBinding('class') public className = 'dir-two';
}
@Component({
template: `
<dir-one></dir-one>
<div class="initial"></div>
<dir-two></dir-two>
`
})
class Cmp {
}
TestBed.configureTestingModule({declarations: [Cmp, DirOne, DirTwo]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const dirOne = fixture.nativeElement.querySelector('dir-one');
const div = fixture.nativeElement.querySelector('div');
const dirTwo = fixture.nativeElement.querySelector('dir-two');
expect(dirOne.classList.contains('dir-one')).toBeTruthy();
expect(dirTwo.classList.contains('dir-two')).toBeTruthy();
expect(div.classList.contains('initial')).toBeTruthy();
});
onlyInIvy('only ivy has style/class bindings debugging support')
.it('should evaluate styling across the template directives when there are multiple elements/sources of styling',
() => {
@Directive({selector: '[one]'})
class DirOne {
@HostBinding('class') public className = 'dir-one';
}
@Directive({selector: '[two]'})
class DirTwo {
@HostBinding('class') public className = 'dir-two';
}
@Component({
template: `
<div class="a" [style.width.px]="w" one></div>
<div class="b" [style.height.px]="h" one two></div>
<div class="c" [style.color]="c" two></div>
`
})
class Cmp {
w = 100;
h = 200;
c = 'red';
}
TestBed.configureTestingModule({declarations: [Cmp, DirOne, DirTwo]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const divA = fixture.nativeElement.querySelector('.a');
const divB = fixture.nativeElement.querySelector('.b');
const divC = fixture.nativeElement.querySelector('.c');
expect(divA.style.width).toEqual('100px');
expect(divB.style.height).toEqual('200px');
expect(divC.style.color).toEqual('red');
});
onlyInIvy('only ivy has style/class bindings debugging support')
.it('should evaluate styling across the template and directives within embedded views',
() => {
@Directive({selector: '[some-dir-with-styling]'})
class SomeDirWithStyling {
@HostBinding('style')
public styles = {
width: '200px',
height: '500px',
};
}
@Component({
template: `
<div
class="item"
*ngFor="let item of items; let i = index"
[style.color]="c"
[style.height.px]="h * i"
some-dir-with-styling>
{{ item }}
</div>
<section [style.width.px]="w"></section>
<p [style.height.px]="h"></p>
`
})
class Cmp {
items: any[] = [];
c = 'red';
w = 100;
h = 100;
}
TestBed.configureTestingModule({declarations: [Cmp, SomeDirWithStyling]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
comp.items = [1, 2, 3, 4];
fixture.detectChanges();
const items = fixture.nativeElement.querySelectorAll('.item');
expect(items.length).toEqual(4);
const [a, b, c, d] = items;
expect(a.style.height).toEqual('0px');
expect(b.style.height).toEqual('100px');
expect(c.style.height).toEqual('200px');
expect(d.style.height).toEqual('300px');
const section = fixture.nativeElement.querySelector('section');
const p = fixture.nativeElement.querySelector('p');
expect(section.style['width']).toEqual('100px');
expect(p.style['height']).toEqual('100px');
});
onlyInIvy('only ivy has style/class bindings debugging support')
.it('should flush bindings even if any styling hasn\'t changed in a previous directive',
() => {
@Directive({selector: '[one]'})
class DirOne {
@HostBinding('style.width') w = '100px';
@HostBinding('style.opacity') o = '0.5';
}
@Directive({selector: '[two]'})
class DirTwo {
@HostBinding('style.height') h = '200px';
@HostBinding('style.color') c = 'red';
}
@Component({template: '<div #target one two></div>'})
class Cmp {
@ViewChild('target', {read: DirOne, static: true}) one!: DirOne;
@ViewChild('target', {read: DirTwo, static: true}) two!: DirTwo;
}
TestBed.configureTestingModule({declarations: [Cmp, DirOne, DirTwo]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(div.style.opacity).toEqual('0.5');
expect(div.style.color).toEqual('red');
expect(div.style.width).toEqual('100px');
expect(div.style.height).toEqual('200px');
comp.two.h = '300px';
fixture.detectChanges();
expect(div.style.opacity).toEqual('0.5');
expect(div.style.color).toEqual('red');
expect(div.style.width).toEqual('100px');
expect(div.style.height).toEqual('300px');
});
it('should work with NO_CHANGE values if they are applied to bindings ', () => {
@Component({
template: `
<div
[style.width]="w"
style.height="{{ h }}"
[style.opacity]="o"></div>
`
})
class Cmp {
w: any = null;
h: any = null;
o: any = null;
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
comp.w = '100px';
comp.h = '200px';
comp.o = '0.5';
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(div.style.width).toEqual('100px');
expect(div.style.height).toEqual('200px');
expect(div.style.opacity).toEqual('0.5');
comp.w = '500px';
comp.o = '1';
fixture.detectChanges();
expect(div.style.width).toEqual('500px');
expect(div.style.height).toEqual('200px');
expect(div.style.opacity).toEqual('1');
});
it('should allow [ngStyle] and [ngClass] to be used together', () => {
@Component({
template: `
<div [ngClass]="c" [ngStyle]="s"></div>
`
})
class Cmp {
c: any = 'foo bar';
s: any = {width: '200px'};
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(div.style.width).toEqual('200px');
expect(div.classList.contains('foo')).toBeTruthy();
expect(div.classList.contains('bar')).toBeTruthy();
});
it('should allow to reset style property value defined using ngStyle', () => {
@Component({
template: `
<div [ngStyle]="s"></div>
`
})
class Cmp {
s: any = {opacity: '1'};
clearStyle(): void {
this.s = null;
}
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
const comp = fixture.componentInstance;
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(div.style.opacity).toEqual('1');
comp.clearStyle();
fixture.detectChanges();
expect(div.style.opacity).toEqual('');
});
it('should allow detectChanges to be run in a property change that causes additional styling to be rendered',
() => {
@Component({
selector: 'child',
template: `
<div [class.ready-child]="readyTpl"></div>
`,
})
class ChildCmp {
readyTpl = false;
@HostBinding('class.ready-host') readyHost = false;
}
@Component({
selector: 'parent',
template: `
<div>
<div #template></div>
<p>{{prop}}</p>
</div>
`,
host: {
'[style.color]': 'color',
},
})
class ParentCmp {
private _prop = '';
@ViewChild('template', {read: ViewContainerRef}) vcr: ViewContainerRef = null!;
private child: ComponentRef<ChildCmp> = null!;
@Input()
set prop(value: string) {
this._prop = value;
if (this.child && value === 'go') {
this.child.instance.readyHost = true;
this.child.instance.readyTpl = true;
this.child.changeDetectorRef.detectChanges();
}
}
get prop() {
return this._prop;
}
ngAfterViewInit() {
const factory = this.componentFactoryResolver.resolveComponentFactory(ChildCmp);
this.child = this.vcr.createComponent(factory);
}
constructor(private componentFactoryResolver: ComponentFactoryResolver) {}
}
@Component({
template: `<parent [prop]="prop"></parent>`,
})
class App {
prop = 'a';
}
@NgModule({
entryComponents: [ChildCmp],
declarations: [ChildCmp],
})
class ChildCmpModule {
}
TestBed.configureTestingModule({declarations: [App, ParentCmp], imports: [ChildCmpModule]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges(false);
let readyHost = fixture.nativeElement.querySelector('.ready-host');
let readyChild = fixture.nativeElement.querySelector('.ready-child');
expect(readyHost).toBeFalsy();
expect(readyChild).toBeFalsy();
fixture.componentInstance.prop = 'go';
fixture.detectChanges(false);
readyHost = fixture.nativeElement.querySelector('.ready-host');
readyChild = fixture.nativeElement.querySelector('.ready-child');
expect(readyHost).toBeTruthy();
expect(readyChild).toBeTruthy();
});
it('should allow detectChanges to be run in a hook that causes additional styling to be rendered',
() => {
@Component({
selector: 'child',
template: `
<div [class.ready-child]="readyTpl"></div>
`,
})
class ChildCmp {
readyTpl = false;
@HostBinding('class.ready-host') readyHost = false;
}
@Component({
selector: 'parent',
template: `
<div>
<div #template></div>
<p>{{prop}}</p>
</div>
`,
})
class ParentCmp {
updateChild = false;
@ViewChild('template', {read: ViewContainerRef}) vcr: ViewContainerRef = null!;
private child: ComponentRef<ChildCmp> = null!;
ngDoCheck() {
if (this.updateChild) {
this.child.instance.readyHost = true;
this.child.instance.readyTpl = true;
this.child.changeDetectorRef.detectChanges();
}
}
ngAfterViewInit() {
const factory = this.componentFactoryResolver.resolveComponentFactory(ChildCmp);
this.child = this.vcr.createComponent(factory);
}
constructor(private componentFactoryResolver: ComponentFactoryResolver) {}
}
@Component({
template: `<parent #parent></parent>`,
})
class App {
@ViewChild('parent', {static: true}) public parent: ParentCmp|null = null;
}
@NgModule({
entryComponents: [ChildCmp],
declarations: [ChildCmp],
})
class ChildCmpModule {
}
TestBed.configureTestingModule({declarations: [App, ParentCmp], imports: [ChildCmpModule]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges(false);
let readyHost = fixture.nativeElement.querySelector('.ready-host');
let readyChild = fixture.nativeElement.querySelector('.ready-child');
expect(readyHost).toBeFalsy();
expect(readyChild).toBeFalsy();
const parent = fixture.componentInstance.parent!;
parent.updateChild = true;
fixture.detectChanges(false);
readyHost = fixture.nativeElement.querySelector('.ready-host');
readyChild = fixture.nativeElement.querySelector('.ready-child');
expect(readyHost).toBeTruthy();
expect(readyChild).toBeTruthy();
});
onlyInIvy('only ivy allows for multiple styles/classes to be balanced across directives')
.it('should allow various duplicate properties to be defined in various styling maps within the template and directive styling bindings',
() => {
@Component({
template: `
<div [style.width]="w"
[style.height]="h"
[style]="s1"
[dir-with-styling]="s2">
`
})
class Cmp {
h = '100px';
w = '100px';
s1: any = {border: '10px solid black', width: '200px'};
s2: any = {border: '10px solid red', width: '300px'};
}
@Directive({selector: '[dir-with-styling]'})
class DirectiveExpectingStyling {
@Input('dir-with-styling') @HostBinding('style') public styles: any = null;
}
TestBed.configureTestingModule({declarations: [Cmp, DirectiveExpectingStyling]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expect(element.style.border).toEqual('10px solid black');
expect(element.style.width).toEqual('100px');
expect(element.style.height).toEqual('100px');
fixture.componentInstance.s1 = null;
fixture.detectChanges();
expect(element.style.border).toEqual('10px solid red');
expect(element.style.width).toEqual('100px');
expect(element.style.height).toEqual('100px');
});
it('should retrieve styles set via Renderer2', () => {
let dirInstance: any;
@Directive({
selector: '[dir]',
})
class Dir {
constructor(public elementRef: ElementRef, public renderer: Renderer2) {
dirInstance = this;
}
setStyles() {
const nativeEl = this.elementRef.nativeElement;
this.renderer.setStyle(nativeEl, 'transform', 'translate3d(0px, 0px, 0px)');
this.renderer.addClass(nativeEl, 'my-class');
}
}
@Component({template: `<div dir></div>`})
class App {
}
TestBed.configureTestingModule({
declarations: [App, Dir],
});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
dirInstance.setStyles();
const div = fixture.debugElement.children[0];
expect(div.styles.transform).toMatch(/translate3d\(0px\s*,\s*0px\s*,\s*0px\)/);
expect(div.classes['my-class']).toBe(true);
});
it('should not set classes when falsy value is passed while a sanitizer is present', () => {
@Component({
// Note that we use `background` here because it needs to be sanitized.
template: `
<span class="container" [ngClass]="{disabled: isDisabled}"></span>
<div [style.background]="background"></div>
`,
})
class AppComponent {
isDisabled = false;
background = 'orange';
}
TestBed.configureTestingModule({declarations: [AppComponent]});
const fixture = TestBed.createComponent(AppComponent);
fixture.detectChanges();
const span = fixture.nativeElement.querySelector('span');
expect(span.classList).not.toContain('disabled');
// The issue we're testing for happens after the second change detection.
fixture.detectChanges();
expect(span.classList).not.toContain('disabled');
});
it('should not set classes when falsy value is passed while a sanitizer from host bindings is present',
() => {
@Directive({selector: '[blockStyles]'})
class StylesDirective {
@HostBinding('style.border') border = '1px solid red';
@HostBinding('style.background') background = 'white';
}
@Component({
template: `<div class="container" [ngClass]="{disabled: isDisabled}" blockStyles></div>`,
})
class AppComponent {
isDisabled = false;
}
TestBed.configureTestingModule({declarations: [AppComponent, StylesDirective]});
const fixture = TestBed.createComponent(AppComponent);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div');
expect(div.classList.contains('disabled')).toBe(false);
// The issue we're testing for happens after the second change detection.
fixture.detectChanges();
expect(div.classList.contains('disabled')).toBe(false);
});
it('should throw an error if a prop-based style/class binding value is changed during checkNoChanges',
() => {
@Component({
template: `
<div [style.color]="color" [class.foo]="fooClass"></div>
`
})
class Cmp {
color = 'red';
fooClass = true;
ngAfterViewInit() {
this.color = 'blue';
this.fooClass = false;
}
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
expect(() => {
fixture.detectChanges();
}).toThrowError(/ExpressionChangedAfterItHasBeenCheckedError/);
});
onlyInIvy('only ivy allows for map-based style AND class bindings')
.it('should throw an error if a map-based style/class binding value is changed during checkNoChanges',
() => {
@Component({
template: `
<div [style]="style" [class]="klass"></div>
`
})
class Cmp {
style: any = 'width: 100px';
klass: any = 'foo';
ngAfterViewInit() {
this.style = 'height: 200px';
this.klass = 'bar';
}
}
TestBed.configureTestingModule({declarations: [Cmp]});
const fixture = TestBed.createComponent(Cmp);
expect(() => {
fixture.detectChanges();
}).toThrowError(/ExpressionChangedAfterItHasBeenCheckedError/);
});
it('should properly merge class interpolation with class-based directives', () => {
@Component(
{template: `<div class="zero {{one}}" [class.two]="true" [ngClass]="'three'"></div>`})
class MyComp {
one = 'one';
}
const fixture =
TestBed.configureTestingModule({declarations: [MyComp]}).createComponent(MyComp);
fixture.detectChanges();
expect(fixture.debugElement.nativeElement.innerHTML).toContain('zero');
expect(fixture.debugElement.nativeElement.innerHTML).toContain('one');
expect(fixture.debugElement.nativeElement.innerHTML).toContain('two');
expect(fixture.debugElement.nativeElement.innerHTML).toContain('three');
});
it('should allow to reset style property value defined using [style.prop.px] binding', () => {
@Component({
template: '<div [style.left.px]="left"></div>',
})
class MyComp {
left = '';
}
TestBed.configureTestingModule({declarations: [MyComp]});
const fixture = TestBed.createComponent(MyComp);
fixture.detectChanges();
const checks = [
['15', '15px'],
[undefined, ''],
[null, ''],
['', ''],
['0', '0px'],
];
const div = fixture.nativeElement.querySelector('div');
checks.forEach((check: any[]) => {
const [fieldValue, expectedValue] = check;
fixture.componentInstance.left = fieldValue;
fixture.detectChanges();
expect(div.style.left).toBe(expectedValue);
});
});
onlyInIvy('only ivy treats [class] in concert with other class bindings')
.it('should retain classes added externally', () => {
@Component({template: `<div [class]="exp"></div>`})
class MyComp {
exp = '';
}
const fixture =
TestBed.configureTestingModule({declarations: [MyComp]}).createComponent(MyComp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div')!;
div.className += ' abc';
expect(splitSortJoin(div.className)).toEqual('abc');
fixture.componentInstance.exp = '1 2 3';
fixture.detectChanges();
expect(splitSortJoin(div.className)).toEqual('1 2 3 abc');
fixture.componentInstance.exp = '4 5 6 7';
fixture.detectChanges();
expect(splitSortJoin(div.className)).toEqual('4 5 6 7 abc');
function splitSortJoin(s: string) {
return s.split(/\s+/).sort().join(' ').trim();
}
});
describe('ExpressionChangedAfterItHasBeenCheckedError', () => {
it('should not throw when bound to SafeValue', () => {
@Component({template: `<div [style.background-image]="iconSafe"></div>`})
class MyComp {
icon = 'https://i.imgur.com/4AiXzf8.jpg';
get iconSafe() {
return this.sanitizer.bypassSecurityTrustStyle(`url("${this.icon}")`);
}
constructor(private sanitizer: DomSanitizer) {}
}
const fixture =
TestBed.configureTestingModule({declarations: [MyComp]}).createComponent(MyComp);
fixture.detectChanges(true /* Verify that check no changes does not cause an exception */);
const div: HTMLElement = fixture.nativeElement.querySelector('div');
expect(div.style.getPropertyValue('background-image'))
.toEqual('url("https://i.imgur.com/4AiXzf8.jpg")');
});
});
isBrowser && it('should process <style> tag contents extracted from template', () => {
@Component({
template: `
<style>
div { width: 10px; }
</style>
<div></div>
`,
styles: [
'div { width: 100px; }',
]
})
class MyComp {
}
TestBed.configureTestingModule({
declarations: [MyComp],
});
const fixture = TestBed.createComponent(MyComp);
fixture.detectChanges();
// `styles` array values are applied first, styles from <style> tags second.
const div = fixture.nativeElement.querySelector('div');
expect(getComputedStyle(div).width).toBe('10px');
});
onlyInIvy('[style] binding is supported in Ivy only')
.it('should allow multiple styling bindings to work alongside property/attribute bindings',
() => {
@Component({
template: `
<div
dir-that-sets-styles
[style]="{'font-size': '300px'}"
[attr.title]="'my-title'"
[attr.data-foo]="'my-foo'">
</div>`
})
class MyComp {
}
@Directive({selector: '[dir-that-sets-styles]'})
class DirThatSetsStyling {
@HostBinding('style.width') public w = '100px';
@HostBinding('style.height') public h = '200px';
}
const fixture =
TestBed.configureTestingModule({declarations: [MyComp, DirThatSetsStyling]})
.createComponent(MyComp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div')!;
expect(div.style.getPropertyValue('width')).toEqual('100px');
expect(div.style.getPropertyValue('height')).toEqual('200px');
expect(div.style.getPropertyValue('font-size')).toEqual('300px');
expect(div.getAttribute('title')).toEqual('my-title');
expect(div.getAttribute('data-foo')).toEqual('my-foo');
});
onlyInIvy('VE clobers in case of @HostBinding("class")')
.it('should allow host styling on the root element with external styling', () => {
@Component({template: '...'})
class MyComp {
@HostBinding('class') public classes = '';
}
const fixture =
TestBed.configureTestingModule({declarations: [MyComp]}).createComponent(MyComp);
fixture.detectChanges();
const root = fixture.nativeElement as HTMLElement;
expect(root.className).toEqual('');
fixture.componentInstance.classes = '1 2 3';
fixture.detectChanges();
expect(root.className.split(/\s+/).sort().join(' ')).toEqual('1 2 3');
root.classList.add('0');
expect(root.className.split(/\s+/).sort().join(' ')).toEqual('0 1 2 3');
fixture.componentInstance.classes = '1 2 3 4';
fixture.detectChanges();
expect(root.className.split(/\s+/).sort().join(' ')).toEqual('0 1 2 3 4');
});
it('should apply camelCased class names', () => {
@Component({template: `<div [class]="'fooBar'" [class.barFoo]="true"></div>`})
class MyComp {
}
TestBed.configureTestingModule({
declarations: [MyComp],
});
const fixture = TestBed.createComponent(MyComp);
fixture.detectChanges();
const classList = (fixture.nativeElement.querySelector('div') as HTMLDivElement).classList;
expect(classList.contains('fooBar')).toBeTruthy();
expect(classList.contains('barFoo')).toBeTruthy();
});
onlyInIvy('[style] bindings are ivy only')
.it('should convert camelCased style property names to snake-case', () => {
@Component({template: `<div [style]="myStyles"></div>`})
class MyComp {
myStyles = {};
}
TestBed.configureTestingModule({
declarations: [MyComp],
});
const fixture = TestBed.createComponent(MyComp);
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div') as HTMLDivElement;
fixture.componentInstance.myStyles = {fontSize: '200px'};
fixture.detectChanges();
expect(div.style.getPropertyValue('font-size')).toEqual('200px');
});
it('should recover from an error thrown in styling bindings', () => {
let raiseWidthError = false;
@Component({template: `<div [style.width]="myWidth" [style.height]="'200px'"></div>`})
class MyComp {
get myWidth() {
if (raiseWidthError) {
throw new Error('...');
}
return '100px';
}
}
TestBed.configureTestingModule({declarations: [MyComp]});
const fixture = TestBed.createComponent(MyComp);
raiseWidthError = true;
expect(() => fixture.detectChanges()).toThrow();
raiseWidthError = false;
fixture.detectChanges();
const div = fixture.nativeElement.querySelector('div') as HTMLDivElement;
expect(div.style.getPropertyValue('width')).toEqual('100px');
expect(div.style.getPropertyValue('height')).toEqual('200px');
});
onlyInIvy('Prioritization works in Ivy only')
.it('should prioritize host bindings for templates first, then directives and finally components',
() => {
@Component({selector: 'my-comp-with-styling', template: ''})
class MyCompWithStyling {
@HostBinding('style') myStyles: any = {width: '300px'};
@HostBinding('style.height') myHeight: any = '305px';
}
@Directive({selector: '[my-dir-with-styling]'})
class MyDirWithStyling {
@HostBinding('style') myStyles: any = {width: '200px'};
@HostBinding('style.height') myHeight: any = '205px';
}
@Component({
template: `
<my-comp-with-styling
style="height:1px; width:2px"
my-dir-with-styling
[style.height]="myHeight"
[style]="myStyles">
</my-comp-with-styling>
`
})
class MyComp {
myStyles: {width?: string} = {width: '100px'};
myHeight: string|null|undefined = '100px';
@ViewChild(MyDirWithStyling) dir!: MyDirWithStyling;
@ViewChild(MyCompWithStyling) comp!: MyCompWithStyling;
}
TestBed.configureTestingModule(
{declarations: [MyComp, MyCompWithStyling, MyDirWithStyling]});
const fixture = TestBed.createComponent(MyComp);
const comp = fixture.componentInstance;
const elm = fixture.nativeElement.querySelector('my-comp-with-styling')!;
fixture.detectChanges();
expect(elm.style.width).toEqual('100px');
expect(elm.style.height).toEqual('100px');
comp.myStyles = {};
comp.myHeight = undefined;
fixture.detectChanges();
expect(elm.style.width).toEqual('2px');
expect(elm.style.height).toEqual('1px');
comp.comp.myStyles = {};
comp.comp.myHeight = undefined;
fixture.detectChanges();
expect(elm.style.width).toEqual('2px');
expect(elm.style.height).toEqual('1px');
comp.dir.myStyles = {};
comp.dir.myHeight = undefined;
fixture.detectChanges();
expect(elm.style.width).toEqual('2px');
expect(elm.style.height).toEqual('1px');
});
onlyInIvy('Prioritization works in Ivy only')
.it('should prioritize directive static bindings over components', () => {
@Component({selector: 'my-comp-with-styling', host: {style: 'color: blue'}, template: ''})
class MyCompWithStyling {
}
@Directive({selector: '[my-dir-with-styling]', host: {style: 'color: red'}})
class MyDirWithStyling {
}
@Component({template: `<my-comp-with-styling my-dir-with-styling></my-comp-with-styling>`})
class MyComp {
}
TestBed.configureTestingModule(
{declarations: [MyComp, MyCompWithStyling, MyDirWithStyling]});
const fixture = TestBed.createComponent(MyComp);
const elm = fixture.nativeElement.querySelector('my-comp-with-styling')!;
fixture.detectChanges();
expect(elm.style.color).toEqual('red');
});
it('should combine host class.foo bindings from multiple directives', () => {
@Directive({
selector: '[dir-that-sets-one-two]',
exportAs: 'one',
})
class DirThatSetsOneTwo {
@HostBinding('class.one') one = false;
@HostBinding('class.two') two = false;
}
@Directive({
selector: '[dir-that-sets-three-four]',
exportAs: 'two',
})
class DirThatSetsThreeFour {
@HostBinding('class.three') three = false;
@HostBinding('class.four') four = false;
}
@Component({
template: `
<div #div1
dir-that-sets-one-two
dir-that-sets-three-four></div>
<div #div2
[class.zero]="zero"
dir-that-sets-one-two
dir-that-sets-three-four></div>
`
})
class MyComp {
@ViewChild('div1', {static: true, read: DirThatSetsOneTwo})
public dirOneA: DirThatSetsOneTwo|null = null;
@ViewChild('div1', {static: true, read: DirThatSetsThreeFour})
public dirTwoA: DirThatSetsThreeFour|null = null;
@ViewChild('div2', {static: true, read: DirThatSetsOneTwo})
public dirOneB: DirThatSetsOneTwo|null = null;
@ViewChild('div2', {static: true, read: DirThatSetsThreeFour})
public dirTwoB: DirThatSetsThreeFour|null = null;
zero = false;
}
TestBed.configureTestingModule(
{declarations: [MyComp, DirThatSetsThreeFour, DirThatSetsOneTwo]});
const fixture = TestBed.createComponent(MyComp);
fixture.detectChanges();
const [div1, div2] = fixture.nativeElement.querySelectorAll('div') as HTMLDivElement[];
expect(div1.className).toBe('');
expect(div2.className).toBe('');
const comp = fixture.componentInstance;
comp.dirOneA!.one = comp.dirOneB!.one = true;
comp.dirOneA!.two = comp.dirOneB!.two = true;
fixture.detectChanges();
expect(div1.classList.contains('one')).toBeTruthy();
expect(div1.classList.contains('two')).toBeTruthy();
expect(div1.classList.contains('three')).toBeFalsy();
expect(div1.classList.contains('four')).toBeFalsy();
expect(div2.classList.contains('one')).toBeTruthy();
expect(div2.classList.contains('two')).toBeTruthy();
expect(div2.classList.contains('three')).toBeFalsy();
expect(div2.classList.contains('four')).toBeFalsy();
expect(div2.classList.contains('zero')).toBeFalsy();
comp.dirTwoA!.three = comp.dirTwoB!.three = true;
comp.dirTwoA!.four = comp.dirTwoB!.four = true;
fixture.detectChanges();
expect(div1.classList.contains('one')).toBeTruthy();
expect(div1.classList.contains('two')).toBeTruthy();
expect(div1.classList.contains('three')).toBeTruthy();
expect(div1.classList.contains('four')).toBeTruthy();
expect(div2.classList.contains('one')).toBeTruthy();
expect(div2.classList.contains('two')).toBeTruthy();
expect(div2.classList.contains('three')).toBeTruthy();
expect(div2.classList.contains('four')).toBeTruthy();
expect(div2.classList.contains('zero')).toBeFalsy();
comp.zero = true;
fixture.detectChanges();
expect(div1.classList.contains('one')).toBeTruthy();
expect(div1.classList.contains('two')).toBeTruthy();
expect(div1.classList.contains('three')).toBeTruthy();
expect(div1.classList.contains('four')).toBeTruthy();
expect(div2.classList.contains('one')).toBeTruthy();
expect(div2.classList.contains('two')).toBeTruthy();
expect(div2.classList.contains('three')).toBeTruthy();
expect(div2.classList.contains('four')).toBeTruthy();
expect(div2.classList.contains('zero')).toBeTruthy();
});
it('should combine static host classes with component "class" host attribute', () => {
@Component({selector: 'comp-with-classes', template: '', host: {'class': 'host'}})
class CompWithClasses {
constructor(ref: ElementRef) {
ref.nativeElement.classList.add('custom');
}
}
@Component({
template: `<comp-with-classes class="inline" *ngFor="let item of items"></comp-with-classes>`
})
class MyComp {
items = [1, 2, 3];
}
const fixture = TestBed
.configureTestingModule({
declarations: [MyComp, CompWithClasses],
})
.createComponent(MyComp);
fixture.detectChanges();
const [one, two, three] =
fixture.nativeElement.querySelectorAll('comp-with-classes') as HTMLDivElement[];
expect(one.classList.contains('custom')).toBeTruthy();
expect(one.classList.contains('inline')).toBeTruthy();
expect(one.classList.contains('host')).toBeTruthy();
expect(two.classList.contains('custom')).toBeTruthy();
expect(two.classList.contains('inline')).toBeTruthy();
expect(two.classList.contains('host')).toBeTruthy();
expect(three.classList.contains('custom')).toBeTruthy();
expect(three.classList.contains('inline')).toBeTruthy();
expect(three.classList.contains('host')).toBeTruthy();
});
it('should allow a single style host binding on an element', () => {
@Component({template: `<div single-host-style-dir></div>`})
class Cmp {
}
@Directive({selector: '[single-host-style-dir]'})
class SingleHostStyleDir {
@HostBinding('style.width') width = '100px';
}
TestBed.configureTestingModule({declarations: [Cmp, SingleHostStyleDir]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('div');
expect(element.style.width).toEqual('100px');
});
it('should override class bindings when a directive extends another directive', () => {
@Component({template: `<child-comp class="template"></child-comp>`})
class Cmp {
}
@Component({
selector: 'parent-comp',
host: {'class': 'parent-comp', '[class.parent-comp-active]': 'true'},
template: '...',
})
class ParentComp {
}
@Component({
selector: 'child-comp',
host: {
'class': 'child-comp',
'[class.child-comp-active]': 'true',
'[class.parent-comp]': 'false',
'[class.parent-comp-active]': 'false'
},
template: '...',
})
class ChildComp extends ParentComp {
}
TestBed.configureTestingModule({declarations: [Cmp, ChildComp, ParentComp]});
const fixture = TestBed.createComponent(Cmp);
fixture.detectChanges();
const element = fixture.nativeElement.querySelector('child-comp');
expect(element.classList.contains('template')).toBeTruthy();
expect(element.classList.contains('child-comp')).toBeTruthy();
expect(element.classList.contains('child-comp-active')).toBeTruthy();
expect(element.classList.contains('parent-comp')).toBeFalsy();
expect(element.classList.contains('parent-comp-active')).toBeFalsy();
});
it('should not set inputs called class if they are not being used in the template', () => {
const logs: string[] = [];
@Directive({selector: '[test]'})
class MyDir {
@Input('class')
set className(value: string) {
logs.push(value);
}
}
@Component({
// Note that we shouldn't have a `class` attribute here.
template: `<div test></div>`
})
class MyComp {
}
TestBed.configureTestingModule({declarations: [MyComp, MyDir]});
const fixture = TestBed.createComponent(MyComp);
fixture.detectChanges();
expect(logs).toEqual([]);
});
describe('regression', () => {
it('should support sanitizer value in the [style] bindings', () => {
if (!ivyEnabled && !supportsWritingStringsToStyleProperty()) {
// VE does not treat `[style]` as anything special, instead it simply writes to the
// `style` property on the element like so `element.style=value`. This seems to work fine
// every where except ie10, where it throws an error and as a consequence this test fails in
// VE on ie10.
return;
}
@Component({template: `<div [style]="style"></div>`})
class HostBindingTestComponent {
style: SafeStyle = this.sanitizer.bypassSecurityTrustStyle('color: white; display: block;');
constructor(private sanitizer: DomSanitizer) {}
}
TestBed.configureTestingModule({declarations: [HostBindingTestComponent]});
const fixture = TestBed.createComponent(HostBindingTestComponent);
fixture.detectChanges();
const div: HTMLElement = fixture.nativeElement.querySelector('div');
expectStyle(div).toEqual({color: 'white', display: 'block'});
});
/**
* Tests to see if the current browser supports non standard way of writing into styles.
*
* This is not the correct way to write to style and is not supported in ie10.
* ```
* div.style = 'color: white';
* ```
*
* This is the correct way to write to styles:
* ```
* div.style.cssText = 'color: white';
* ```
*
* Even though writing to `div.style` is not officially supported, it works in all
* browsers except ie10.
*
* This function detects this condition and allows us to skip the test.
*/
function supportsWritingStringsToStyleProperty() {
const div = document.createElement('div');
const CSS = 'color: white;';
try {
(div as any).style = CSS;
} catch (e) {
return false;
}
return div.style.cssText === CSS;
}
onlyInIvy('styling priority resolution is Ivy only feature.')
.it('should allow lookahead binding on second pass #35118', () => {
@Component({
selector: 'my-cmp',
template: ``,
host: {
'[class.foo]': 'hostClass',
}
})
class MyCmp {
hostClass = true;
}
@Directive({
selector: '[host-styling]',
host: {
'[class]': 'hostClass',
}
})
class HostStylingsDir {
hostClass = {'bar': true};
}
@Component({template: `<my-cmp *ngFor="let i of [1,2]" host-styling></my-cmp>`})
class MyApp {
// When the first view in the list gets CD-ed, everything works.
// When the second view gets CD-ed, the styling has already created the data structures
// in the `TView`. As a result when `[class.foo]` runs it already knows that `[class]`
// is a duplicate and hence it can overwrite the `[class.foo]` binding. While the
// styling resolution is happening the algorithm reads the value of the `[class]`
// (because it overwrites `[class.foo]`), however `[class]` has not yet executed and
// therefore it does not have normalized value in its `LView`. The result is that the
// assertions fails as it expects an `KeyValueArray`.
}
TestBed.configureTestingModule({declarations: [MyApp, MyCmp, HostStylingsDir]});
const fixture = TestBed.createComponent(MyApp);
expect(() => fixture.detectChanges()).not.toThrow();
const [cmp1, cmp2] = fixture.nativeElement.querySelectorAll('my-cmp');
expectClass(cmp1).toEqual({foo: true, bar: true});
expectClass(cmp2).toEqual({foo: true, bar: true});
});
it('should not bind [class] to @Input("className")', () => {
@Component({
selector: 'my-cmp',
template: `className = {{className}}`,
})
class MyCmp {
@Input() className: string = 'unbound';
}
@Component({template: `<my-cmp [class]="'bound'"></my-cmp>`})
class MyApp {
}
TestBed.configureTestingModule({declarations: [MyApp, MyCmp]});
const fixture = TestBed.createComponent(MyApp);
fixture.detectChanges();
expect(fixture.nativeElement.textContent).toEqual('className = unbound');
});
it('should not bind class to @Input("className")', () => {
@Component({
selector: 'my-cmp',
template: `className = {{className}}`,
})
class MyCmp {
@Input() className: string = 'unbound';
}
@Component({template: `<my-cmp class="bound"></my-cmp>`})
class MyApp {
}
TestBed.configureTestingModule({declarations: [MyApp, MyCmp]});
const fixture = TestBed.createComponent(MyApp);
fixture.detectChanges();
expect(fixture.nativeElement.textContent).toEqual('className = unbound');
});
});
});
function assertStyleCounters(countForSet: number, countForRemove: number) {
expect(ngDevMode!.rendererSetStyle).toEqual(countForSet);
expect(ngDevMode!.rendererRemoveStyle).toEqual(countForRemove);
}
function assertStyle(element: HTMLElement, prop: string, value: any) {
expect((element.style as any)[prop]).toEqual(value);
}
function expectStyle(element: HTMLElement) {
return expect(getElementStyles(element));
}
function expectClass(element: HTMLElement) {
return expect(getElementClasses(element));
}
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