angular-cn/packages/core/test/render3/component_spec.ts

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/**
* @license
* Copyright Google Inc. 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 {DoCheck, Input, TemplateRef, ViewContainerRef, ViewEncapsulation, createInjector, defineInjectable, defineInjector} from '../../src/core';
import {getRenderedText} from '../../src/render3/component';
import {AttributeMarker, ComponentFactory, LifecycleHooksFeature, defineComponent, directiveInject, markDirty, template} from '../../src/render3/index';
import {bind, container, containerRefreshEnd, containerRefreshStart, element, elementEnd, elementProperty, elementStart, embeddedViewEnd, embeddedViewStart, nextContext, text, textBinding, tick} from '../../src/render3/instructions';
import {ComponentDefInternal, DirectiveDefInternal, RenderFlags} from '../../src/render3/interfaces/definition';
import {createRendererType2} from '../../src/view/index';
import {NgIf} from './common_with_def';
import {getRendererFactory2} from './imported_renderer2';
import {ComponentFixture, containerEl, createComponent, renderComponent, renderToHtml, requestAnimationFrame, toHtml} from './render_util';
describe('component', () => {
class CounterComponent {
count = 0;
increment() { this.count++; }
static ngComponentDef = defineComponent({
type: CounterComponent,
encapsulation: ViewEncapsulation.None,
selectors: [['counter']],
consts: 1,
vars: 1,
template: function(rf: RenderFlags, ctx: CounterComponent) {
if (rf & RenderFlags.Create) {
text(0);
}
if (rf & RenderFlags.Update) {
textBinding(0, bind(ctx.count));
}
},
factory: () => new CounterComponent,
inputs: {count: 'count'},
});
}
describe('renderComponent', () => {
it('should render on initial call', () => {
renderComponent(CounterComponent);
expect(toHtml(containerEl)).toEqual('0');
});
it('should re-render on input change or method invocation', () => {
const component = renderComponent(CounterComponent);
expect(toHtml(containerEl)).toEqual('0');
component.count = 123;
markDirty(component);
expect(toHtml(containerEl)).toEqual('0');
requestAnimationFrame.flush();
expect(toHtml(containerEl)).toEqual('123');
component.increment();
markDirty(component);
expect(toHtml(containerEl)).toEqual('123');
requestAnimationFrame.flush();
expect(toHtml(containerEl)).toEqual('124');
});
class MyService {
constructor(public value: string) {}
static ngInjectableDef =
defineInjectable({providedIn: 'root', factory: () => new MyService('no-injector')});
}
class MyComponent {
constructor(public myService: MyService) {}
static ngComponentDef = defineComponent({
type: MyComponent,
encapsulation: ViewEncapsulation.None,
selectors: [['my-component']],
factory: () => new MyComponent(directiveInject(MyService)),
consts: 1,
vars: 1,
template: function(fs: RenderFlags, ctx: MyComponent) {
if (fs & RenderFlags.Create) {
text(0);
}
if (fs & RenderFlags.Update) {
textBinding(0, bind(ctx.myService.value));
}
}
});
}
class MyModule {
static ngInjectorDef = defineInjector({
factory: () => new MyModule(),
providers: [{provide: MyService, useValue: new MyService('injector')}]
});
}
it('should support bootstrapping without injector', () => {
const fixture = new ComponentFixture(MyComponent);
expect(fixture.html).toEqual('no-injector');
});
it('should support bootstrapping with injector', () => {
const fixture = new ComponentFixture(MyComponent, {injector: createInjector(MyModule)});
expect(fixture.html).toEqual('injector');
});
});
});
describe('component with a container', () => {
function showItems(rf: RenderFlags, ctx: {items: string[]}) {
if (rf & RenderFlags.Create) {
container(0);
}
if (rf & RenderFlags.Update) {
containerRefreshStart(0);
{
for (const item of ctx.items) {
const rf0 = embeddedViewStart(0, 1, 1);
{
if (rf0 & RenderFlags.Create) {
text(0);
}
if (rf0 & RenderFlags.Update) {
textBinding(0, bind(item));
}
}
embeddedViewEnd();
}
}
containerRefreshEnd();
}
}
class WrapperComponent {
// TODO(issue/24571): remove '!'.
items !: string[];
static ngComponentDef = defineComponent({
type: WrapperComponent,
encapsulation: ViewEncapsulation.None,
selectors: [['wrapper']],
consts: 1,
vars: 0,
template: function ChildComponentTemplate(rf: RenderFlags, ctx: {items: string[]}) {
if (rf & RenderFlags.Create) {
container(0);
}
if (rf & RenderFlags.Update) {
containerRefreshStart(0);
{
const rf0 = embeddedViewStart(0, 1, 0);
{ showItems(rf0, {items: ctx.items}); }
embeddedViewEnd();
}
containerRefreshEnd();
}
},
factory: () => new WrapperComponent,
inputs: {items: 'items'}
});
}
function template(rf: RenderFlags, ctx: {items: string[]}) {
if (rf & RenderFlags.Create) {
element(0, 'wrapper');
}
if (rf & RenderFlags.Update) {
elementProperty(0, 'items', bind(ctx.items));
}
}
const defs = [WrapperComponent];
it('should re-render on input change', () => {
const ctx: {items: string[]} = {items: ['a']};
expect(renderToHtml(template, ctx, 1, 1, defs)).toEqual('<wrapper>a</wrapper>');
ctx.items = [...ctx.items, 'b'];
expect(renderToHtml(template, ctx, 1, 1, defs)).toEqual('<wrapper>ab</wrapper>');
});
});
// TODO: add tests with Native once tests are run in real browser (domino doesn't support shadow
// root)
describe('encapsulation', () => {
class WrapperComponent {
static ngComponentDef = defineComponent({
type: WrapperComponent,
encapsulation: ViewEncapsulation.None,
selectors: [['wrapper']],
consts: 1,
vars: 0,
template: function(rf: RenderFlags, ctx: WrapperComponent) {
if (rf & RenderFlags.Create) {
element(0, 'encapsulated');
}
},
factory: () => new WrapperComponent,
directives: () => [EncapsulatedComponent]
});
}
class EncapsulatedComponent {
static ngComponentDef = defineComponent({
type: EncapsulatedComponent,
selectors: [['encapsulated']],
consts: 2,
vars: 0,
template: function(rf: RenderFlags, ctx: EncapsulatedComponent) {
if (rf & RenderFlags.Create) {
text(0, 'foo');
element(1, 'leaf');
}
},
factory: () => new EncapsulatedComponent,
encapsulation: ViewEncapsulation.Emulated,
styles: [],
data: {},
directives: () => [LeafComponent]
});
}
class LeafComponent {
static ngComponentDef = defineComponent({
type: LeafComponent,
encapsulation: ViewEncapsulation.None,
selectors: [['leaf']],
consts: 2,
vars: 0,
template: function(rf: RenderFlags, ctx: LeafComponent) {
if (rf & RenderFlags.Create) {
elementStart(0, 'span');
{ text(1, 'bar'); }
elementEnd();
}
},
factory: () => new LeafComponent,
});
}
it('should encapsulate children, but not host nor grand children', () => {
renderComponent(WrapperComponent, {rendererFactory: getRendererFactory2(document)});
expect(containerEl.outerHTML)
.toMatch(
/<div host=""><encapsulated _nghost-c(\d+)="">foo<leaf _ngcontent-c\1=""><span>bar<\/span><\/leaf><\/encapsulated><\/div>/);
});
it('should encapsulate host', () => {
renderComponent(EncapsulatedComponent, {rendererFactory: getRendererFactory2(document)});
expect(containerEl.outerHTML)
.toMatch(
/<div host="" _nghost-c(\d+)="">foo<leaf _ngcontent-c\1=""><span>bar<\/span><\/leaf><\/div>/);
});
it('should encapsulate host and children with different attributes', () => {
class WrapperComponentWith {
static ngComponentDef = defineComponent({
type: WrapperComponentWith,
selectors: [['wrapper']],
consts: 1,
vars: 0,
template: function(rf: RenderFlags, ctx: WrapperComponentWith) {
if (rf & RenderFlags.Create) {
element(0, 'leaf');
}
},
factory: () => new WrapperComponentWith,
encapsulation: ViewEncapsulation.Emulated,
styles: [],
data: {},
directives: () => [LeafComponentwith]
});
}
class LeafComponentwith {
static ngComponentDef = defineComponent({
type: LeafComponentwith,
selectors: [['leaf']],
consts: 2,
vars: 0,
template: function(rf: RenderFlags, ctx: LeafComponentwith) {
if (rf & RenderFlags.Create) {
elementStart(0, 'span');
{ text(1, 'bar'); }
elementEnd();
}
},
factory: () => new LeafComponentwith,
encapsulation: ViewEncapsulation.Emulated,
styles: [],
data: {},
});
}
renderComponent(WrapperComponentWith, {rendererFactory: getRendererFactory2(document)});
expect(containerEl.outerHTML)
.toMatch(
/<div host="" _nghost-c(\d+)=""><leaf _ngcontent-c\1="" _nghost-c(\d+)=""><span _ngcontent-c\2="">bar<\/span><\/leaf><\/div>/);
});
});
describe('recursive components', () => {
let events: string[];
let count: number;
beforeEach(() => {
events = [];
count = 0;
});
class TreeNode {
constructor(
public value: number, public depth: number, public left: TreeNode|null,
public right: TreeNode|null) {}
}
/**
* {{ data.value }}
*
* % if (data.left != null) {
* <tree-comp [data]="data.left"></tree-comp>
* % }
* % if (data.right != null) {
* <tree-comp [data]="data.right"></tree-comp>
* % }
*/
class TreeComponent {
data: TreeNode = _buildTree(0);
ngDoCheck() { events.push('check' + this.data.value); }
ngOnDestroy() { events.push('destroy' + this.data.value); }
static ngComponentDef = defineComponent({
type: TreeComponent,
encapsulation: ViewEncapsulation.None,
selectors: [['tree-comp']],
factory: () => new TreeComponent(),
consts: 3,
vars: 1,
template: (rf: RenderFlags, ctx: TreeComponent) => {
if (rf & RenderFlags.Create) {
text(0);
container(1);
container(2);
}
if (rf & RenderFlags.Update) {
textBinding(0, bind(ctx.data.value));
containerRefreshStart(1);
{
if (ctx.data.left != null) {
let rf0 = embeddedViewStart(0, 1, 1);
if (rf0 & RenderFlags.Create) {
element(0, 'tree-comp');
}
if (rf0 & RenderFlags.Update) {
elementProperty(0, 'data', bind(ctx.data.left));
}
embeddedViewEnd();
}
}
containerRefreshEnd();
containerRefreshStart(2);
{
if (ctx.data.right != null) {
let rf0 = embeddedViewStart(0, 1, 1);
if (rf0 & RenderFlags.Create) {
element(0, 'tree-comp');
}
if (rf0 & RenderFlags.Update) {
elementProperty(0, 'data', bind(ctx.data.right));
}
embeddedViewEnd();
}
}
containerRefreshEnd();
}
},
inputs: {data: 'data'}
});
}
(TreeComponent.ngComponentDef as ComponentDefInternal<TreeComponent>).directiveDefs =
() => [TreeComponent.ngComponentDef];
/**
* {{ data.value }}
* <ng-if-tree [data]="data.left" *ngIf="data.left"></ng-if-tree>
* <ng-if-tree [data]="data.right" *ngIf="data.right"></ng-if-tree>
*/
class NgIfTree {
data: TreeNode = _buildTree(0);
ngOnDestroy() { events.push('destroy' + this.data.value); }
static ngComponentDef = defineComponent({
type: NgIfTree,
encapsulation: ViewEncapsulation.None,
selectors: [['ng-if-tree']],
factory: () => new NgIfTree(),
consts: 3,
vars: 3,
template: (rf: RenderFlags, ctx: NgIfTree) => {
if (rf & RenderFlags.Create) {
text(0);
template(1, IfTemplate, 1, 1, '', [AttributeMarker.SelectOnly, 'ngIf']);
template(2, IfTemplate2, 1, 1, '', [AttributeMarker.SelectOnly, 'ngIf']);
}
if (rf & RenderFlags.Update) {
textBinding(0, bind(ctx.data.value));
elementProperty(1, 'ngIf', bind(ctx.data.left));
elementProperty(2, 'ngIf', bind(ctx.data.right));
}
},
inputs: {data: 'data'},
});
}
function IfTemplate(rf: RenderFlags, left: any) {
if (rf & RenderFlags.Create) {
elementStart(0, 'ng-if-tree');
elementEnd();
}
if (rf & RenderFlags.Update) {
const parent = nextContext();
elementProperty(0, 'data', bind(parent.data.left));
}
}
function IfTemplate2(rf: RenderFlags, right: any) {
if (rf & RenderFlags.Create) {
elementStart(0, 'ng-if-tree');
elementEnd();
}
if (rf & RenderFlags.Update) {
const parent = nextContext();
elementProperty(0, 'data', bind(parent.data.right));
}
}
(NgIfTree.ngComponentDef as ComponentDefInternal<NgIfTree>).directiveDefs =
() => [NgIfTree.ngComponentDef, NgIf.ngDirectiveDef];
function _buildTree(currDepth: number): TreeNode {
const children = currDepth < 2 ? _buildTree(currDepth + 1) : null;
const children2 = currDepth < 2 ? _buildTree(currDepth + 1) : null;
return new TreeNode(count++, currDepth, children, children2);
}
it('should check each component just once', () => {
const comp = renderComponent(TreeComponent, {hostFeatures: [LifecycleHooksFeature]});
expect(getRenderedText(comp)).toEqual('6201534');
expect(events).toEqual(['check6', 'check2', 'check0', 'check1', 'check5', 'check3', 'check4']);
events = [];
tick(comp);
expect(events).toEqual(['check6', 'check2', 'check0', 'check1', 'check5', 'check3', 'check4']);
});
// This tests that the view tree is set up properly for recursive components
it('should call onDestroys properly', () => {
/**
* % if (!skipContent) {
* <tree-comp></tree-comp>
* % }
*/
const App = createComponent('app', function(rf: RenderFlags, ctx: any) {
if (rf & RenderFlags.Create) {
container(0);
}
if (rf & RenderFlags.Update) {
containerRefreshStart(0);
if (!ctx.skipContent) {
const rf0 = embeddedViewStart(0, 1, 0);
if (rf0 & RenderFlags.Create) {
elementStart(0, 'tree-comp');
elementEnd();
}
embeddedViewEnd();
}
containerRefreshEnd();
}
}, 1, 0, [TreeComponent]);
const fixture = new ComponentFixture(App);
expect(getRenderedText(fixture.component)).toEqual('6201534');
events = [];
fixture.component.skipContent = true;
fixture.update();
expect(events).toEqual(
['destroy0', 'destroy1', 'destroy2', 'destroy3', 'destroy4', 'destroy5', 'destroy6']);
});
it('should call onDestroys properly with ngIf', () => {
/**
* % if (!skipContent) {
* <ng-if-tree></ng-if-tree>
* % }
*/
const App = createComponent('app', function(rf: RenderFlags, ctx: any) {
if (rf & RenderFlags.Create) {
container(0);
}
if (rf & RenderFlags.Update) {
containerRefreshStart(0);
if (!ctx.skipContent) {
const rf0 = embeddedViewStart(0, 1, 0);
if (rf0 & RenderFlags.Create) {
elementStart(0, 'ng-if-tree');
elementEnd();
}
embeddedViewEnd();
}
containerRefreshEnd();
}
}, 1, 0, [NgIfTree]);
const fixture = new ComponentFixture(App);
expect(getRenderedText(fixture.component)).toEqual('6201534');
events = [];
fixture.component.skipContent = true;
fixture.update();
expect(events).toEqual(
['destroy0', 'destroy1', 'destroy2', 'destroy3', 'destroy4', 'destroy5', 'destroy6']);
});
it('should map inputs minified & unminified names', async() => {
class TestInputsComponent {
// TODO(issue/24571): remove '!'.
minifiedName !: string;
static ngComponentDef = defineComponent({
type: TestInputsComponent,
encapsulation: ViewEncapsulation.None,
selectors: [['test-inputs']],
inputs: {minifiedName: 'unminifiedName'},
consts: 0,
vars: 0,
factory: () => new TestInputsComponent(),
template: function(rf: RenderFlags, ctx: TestInputsComponent): void {
// Template not needed for this test
}
});
}
const testInputsComponentFactory = new ComponentFactory(TestInputsComponent.ngComponentDef);
expect([
{propName: 'minifiedName', templateName: 'unminifiedName'}
]).toEqual(testInputsComponentFactory.inputs);
});
});