angular-cn/modules/@angular/common/test/directives/ng_if_spec.ts

289 lines
13 KiB
TypeScript

/**
* @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 {beforeEach, ddescribe, describe, iit, inject, it, xit,} from '@angular/core/testing/testing_internal';
import {TestComponentBuilder} from '@angular/compiler/testing';
import {AsyncTestCompleter} from '@angular/core/testing/testing_internal';
import {expect} from '@angular/platform-browser/testing/matchers';
import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
import {Component} from '@angular/core';
import {NgIf} from '@angular/common';
import {IS_DART} from '../../src/facade/lang';
export function main() {
describe('ngIf directive', () => {
it('should work in a template attribute',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var html = '<div><copy-me template="ngIf booleanCondition">hello</copy-me></div>';
tcb.overrideTemplate(TestComponent, html)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(1);
expect(fixture.debugElement.nativeElement).toHaveText('hello');
async.done();
});
}));
it('should work in a template element',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var html =
'<div><template [ngIf]="booleanCondition"><copy-me>hello2</copy-me></template></div>';
tcb.overrideTemplate(TestComponent, html)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(1);
expect(fixture.debugElement.nativeElement).toHaveText('hello2');
async.done();
});
}));
it('should toggle node when condition changes',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var html = '<div><copy-me template="ngIf booleanCondition">hello</copy-me></div>';
tcb.overrideTemplate(TestComponent, html)
.createAsync(TestComponent)
.then((fixture) => {
fixture.debugElement.componentInstance.booleanCondition = false;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(0);
expect(fixture.debugElement.nativeElement).toHaveText('');
fixture.debugElement.componentInstance.booleanCondition = true;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(1);
expect(fixture.debugElement.nativeElement).toHaveText('hello');
fixture.debugElement.componentInstance.booleanCondition = false;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(0);
expect(fixture.debugElement.nativeElement).toHaveText('');
async.done();
});
}));
it('should handle nested if correctly',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var html =
'<div><template [ngIf]="booleanCondition"><copy-me *ngIf="nestedBooleanCondition">hello</copy-me></template></div>';
tcb.overrideTemplate(TestComponent, html)
.createAsync(TestComponent)
.then((fixture) => {
fixture.debugElement.componentInstance.booleanCondition = false;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(0);
expect(fixture.debugElement.nativeElement).toHaveText('');
fixture.debugElement.componentInstance.booleanCondition = true;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(1);
expect(fixture.debugElement.nativeElement).toHaveText('hello');
fixture.debugElement.componentInstance.nestedBooleanCondition = false;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(0);
expect(fixture.debugElement.nativeElement).toHaveText('');
fixture.debugElement.componentInstance.nestedBooleanCondition = true;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(1);
expect(fixture.debugElement.nativeElement).toHaveText('hello');
fixture.debugElement.componentInstance.booleanCondition = false;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(0);
expect(fixture.debugElement.nativeElement).toHaveText('');
async.done();
});
}));
it('should update several nodes with if',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var html = '<div>' +
'<copy-me template="ngIf numberCondition + 1 >= 2">helloNumber</copy-me>' +
'<copy-me template="ngIf stringCondition == \'foo\'">helloString</copy-me>' +
'<copy-me template="ngIf functionCondition(stringCondition, numberCondition)">helloFunction</copy-me>' +
'</div>';
tcb.overrideTemplate(TestComponent, html)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(3);
expect(getDOM().getText(fixture.debugElement.nativeElement))
.toEqual('helloNumberhelloStringhelloFunction');
fixture.debugElement.componentInstance.numberCondition = 0;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(1);
expect(fixture.debugElement.nativeElement).toHaveText('helloString');
fixture.debugElement.componentInstance.numberCondition = 1;
fixture.debugElement.componentInstance.stringCondition = 'bar';
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(1);
expect(fixture.debugElement.nativeElement).toHaveText('helloNumber');
async.done();
});
}));
if (!IS_DART) {
it('should not add the element twice if the condition goes from true to true (JS)',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var html = '<div><copy-me template="ngIf numberCondition">hello</copy-me></div>';
tcb.overrideTemplate(TestComponent, html)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(1);
expect(fixture.debugElement.nativeElement).toHaveText('hello');
fixture.debugElement.componentInstance.numberCondition = 2;
fixture.detectChanges();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(1);
expect(fixture.debugElement.nativeElement).toHaveText('hello');
async.done();
});
}));
it('should not recreate the element if the condition goes from true to true (JS)',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var html = '<div><copy-me template="ngIf numberCondition">hello</copy-me></div>';
tcb.overrideTemplate(TestComponent, html)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
getDOM().addClass(
getDOM().querySelector(fixture.debugElement.nativeElement, 'copy-me'),
'foo');
fixture.debugElement.componentInstance.numberCondition = 2;
fixture.detectChanges();
expect(
getDOM().hasClass(
getDOM().querySelector(fixture.debugElement.nativeElement, 'copy-me'),
'foo'))
.toBe(true);
async.done();
});
}));
}
if (IS_DART) {
it('should not create the element if the condition is not a boolean (DART)',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var html = '<div><copy-me template="ngIf numberCondition">hello</copy-me></div>';
tcb.overrideTemplate(TestComponent, html)
.createAsync(TestComponent)
.then((fixture) => {
expect(() => fixture.detectChanges()).toThrowError();
expect(getDOM()
.querySelectorAll(fixture.debugElement.nativeElement, 'copy-me')
.length)
.toEqual(0);
expect(fixture.debugElement.nativeElement).toHaveText('');
async.done();
});
}));
}
});
}
@Component({selector: 'test-cmp', directives: [NgIf], template: ''})
class TestComponent {
booleanCondition: boolean;
nestedBooleanCondition: boolean;
numberCondition: number;
stringCondition: string;
functionCondition: Function;
constructor() {
this.booleanCondition = true;
this.nestedBooleanCondition = true;
this.numberCondition = 1;
this.stringCondition = 'foo';
this.functionCondition = function(s: any, n: any): boolean { return s == 'foo' && n == 1; };
}
}