578 lines
25 KiB
TypeScript
578 lines
25 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {beforeEach, beforeEachProviders, ddescribe, describe, iit, inject, it, xit,} from '@angular/core/testing/testing_internal';
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import {AsyncTestCompleter} from '@angular/core/testing/testing_internal';
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import {TestComponentBuilder, ComponentFixture} from '@angular/compiler/testing';
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import {ListWrapper} from '../../src/facade/collection';
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import {IS_DART} from '../../src/facade/lang';
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import {Component, TemplateRef, ContentChild} from '@angular/core';
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import {NgFor} from '@angular/common';
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import {NgIf} from '@angular/common';
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import {expect} from '@angular/platform-browser/testing/matchers';
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import {By} from '@angular/platform-browser/src/dom/debug/by';
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export function main() {
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describe('ngFor', () => {
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var TEMPLATE =
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'<div><copy-me template="ngFor let item of items">{{item.toString()}};</copy-me></div>';
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it('should reflect initial elements',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, TEMPLATE)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('1;2;');
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async.done();
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});
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}));
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it('should reflect added elements',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, TEMPLATE)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.detectChanges();
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(<number[]>fixture.debugElement.componentInstance.items).push(3);
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('1;2;3;');
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async.done();
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});
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}));
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it('should reflect removed elements',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, TEMPLATE)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.detectChanges();
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ListWrapper.removeAt(fixture.debugElement.componentInstance.items, 1);
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('1;');
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async.done();
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});
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}));
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it('should reflect moved elements',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, TEMPLATE)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.detectChanges();
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ListWrapper.removeAt(fixture.debugElement.componentInstance.items, 0);
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(<number[]>fixture.debugElement.componentInstance.items).push(1);
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('2;1;');
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async.done();
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});
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}));
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it('should reflect a mix of all changes (additions/removals/moves)',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, TEMPLATE)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.debugElement.componentInstance.items = [0, 1, 2, 3, 4, 5];
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fixture.detectChanges();
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fixture.debugElement.componentInstance.items = [6, 2, 7, 0, 4, 8];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('6;2;7;0;4;8;');
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async.done();
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});
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}));
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it('should iterate over an array of objects',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template =
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'<ul><li template="ngFor let item of items">{{item["name"]}};</li></ul>';
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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// INIT
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fixture.debugElement.componentInstance.items =
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[{'name': 'misko'}, {'name': 'shyam'}];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('misko;shyam;');
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// GROW
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(<any[]>fixture.debugElement.componentInstance.items).push({'name': 'adam'});
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('misko;shyam;adam;');
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// SHRINK
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ListWrapper.removeAt(fixture.debugElement.componentInstance.items, 2);
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ListWrapper.removeAt(fixture.debugElement.componentInstance.items, 0);
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('shyam;');
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async.done();
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});
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}));
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it('should gracefully handle nulls',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template = '<ul><li template="ngFor let item of null">{{item}};</li></ul>';
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('');
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async.done();
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});
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}));
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it('should gracefully handle ref changing to null and back',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, TEMPLATE)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('1;2;');
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fixture.debugElement.componentInstance.items = null;
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('');
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fixture.debugElement.componentInstance.items = [1, 2, 3];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('1;2;3;');
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async.done();
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});
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}));
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if (!IS_DART) {
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it('should throw on non-iterable ref and suggest using an array',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, TEMPLATE)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.debugElement.componentInstance.items = 'whaaa';
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try {
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fixture.detectChanges()
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} catch (e) {
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expect(e.message).toContain(
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`Cannot find a differ supporting object 'whaaa' of type 'string'. NgFor only supports binding to Iterables such as Arrays.`);
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async.done();
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}
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});
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}));
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}
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it('should throw on ref changing to string',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, TEMPLATE)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('1;2;');
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fixture.debugElement.componentInstance.items = 'whaaa';
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expect(() => fixture.detectChanges()).toThrowError();
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async.done();
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});
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}));
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it('should works with duplicates',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, TEMPLATE)
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.createAsync(TestComponent)
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.then((fixture) => {
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var a = new Foo();
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fixture.debugElement.componentInstance.items = [a, a];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('foo;foo;');
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async.done();
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});
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}));
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it('should repeat over nested arrays',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template = '<div>' +
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'<div template="ngFor let item of items">' +
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'<div template="ngFor let subitem of item">' +
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'{{subitem}}-{{item.length}};' +
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'</div>|' +
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'</div>' +
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'</div>';
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.debugElement.componentInstance.items = [['a', 'b'], ['c']];
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fixture.detectChanges();
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fixture.detectChanges();
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('a-2;b-2;|c-1;|');
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fixture.debugElement.componentInstance.items = [['e'], ['f', 'g']];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('e-1;|f-2;g-2;|');
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async.done();
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});
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}));
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it('should repeat over nested arrays with no intermediate element',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template = '<div><template ngFor let-item [ngForOf]="items">' +
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'<div template="ngFor let subitem of item">' +
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'{{subitem}}-{{item.length}};' +
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'</div></template></div>';
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.debugElement.componentInstance.items = [['a', 'b'], ['c']];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('a-2;b-2;c-1;');
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fixture.debugElement.componentInstance.items = [['e'], ['f', 'g']];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('e-1;f-2;g-2;');
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async.done();
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});
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}));
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it('should repeat over nested ngIf that are the last node in the ngFor temlate',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template =
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`<div><template ngFor let-item [ngForOf]="items" let-i="index"><div>{{i}}|</div>` +
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`<div *ngIf="i % 2 == 0">even|</div></template></div>`;
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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var el = fixture.debugElement.nativeElement;
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var items = [1];
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fixture.debugElement.componentInstance.items = items;
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fixture.detectChanges();
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expect(el).toHaveText('0|even|');
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items.push(1);
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fixture.detectChanges();
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expect(el).toHaveText('0|even|1|');
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items.push(1);
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fixture.detectChanges();
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expect(el).toHaveText('0|even|1|2|even|');
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async.done();
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});
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}));
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it('should display indices correctly',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template =
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'<div><copy-me template="ngFor: let item of items; let i=index">{{i.toString()}}</copy-me></div>';
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.debugElement.componentInstance.items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('0123456789');
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fixture.debugElement.componentInstance.items = [1, 2, 6, 7, 4, 3, 5, 8, 9, 0];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('0123456789');
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async.done();
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});
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}));
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it('should display first item correctly',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template =
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'<div><copy-me template="ngFor: let item of items; let isFirst=first">{{isFirst.toString()}}</copy-me></div>';
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.debugElement.componentInstance.items = [0, 1, 2];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('truefalsefalse');
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fixture.debugElement.componentInstance.items = [2, 1];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('truefalse');
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async.done();
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});
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}));
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it('should display last item correctly',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template =
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'<div><copy-me template="ngFor: let item of items; let isLast=last">{{isLast.toString()}}</copy-me></div>';
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.debugElement.componentInstance.items = [0, 1, 2];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('falsefalsetrue');
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fixture.debugElement.componentInstance.items = [2, 1];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('falsetrue');
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async.done();
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});
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}));
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it('should display even items correctly',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template =
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'<div><copy-me template="ngFor: let item of items; let isEven=even">{{isEven.toString()}}</copy-me></div>';
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.debugElement.componentInstance.items = [0, 1, 2];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('truefalsetrue');
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fixture.debugElement.componentInstance.items = [2, 1];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('truefalse');
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async.done();
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});
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}));
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it('should display odd items correctly',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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var template =
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'<div><copy-me template="ngFor: let item of items; let isOdd=odd">{{isOdd.toString()}}</copy-me></div>';
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tcb.overrideTemplate(TestComponent, template)
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.createAsync(TestComponent)
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.then((fixture) => {
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fixture.debugElement.componentInstance.items = [0, 1, 2, 3];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('falsetruefalsetrue');
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fixture.debugElement.componentInstance.items = [2, 1];
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fixture.detectChanges();
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expect(fixture.debugElement.nativeElement).toHaveText('falsetrue');
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async.done();
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});
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}));
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it('should allow to use a custom template',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(
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TestComponent,
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'<ul><template ngFor [ngForOf]="items" [ngForTemplate]="contentTpl"></template></ul>')
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.overrideTemplate(
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ComponentUsingTestComponent,
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'<test-cmp><li template="let item; let i=index">{{i}}: {{item}};</li></test-cmp>')
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.createAsync(ComponentUsingTestComponent)
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.then((fixture) => {
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var testComponent = fixture.debugElement.children[0];
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testComponent.componentInstance.items = ['a', 'b', 'c'];
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fixture.detectChanges();
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expect(testComponent.nativeElement).toHaveText('0: a;1: b;2: c;');
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async.done();
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});
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}));
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|
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it('should use a default template if a custom one is null',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, `<ul><template ngFor let-item [ngForOf]="items"
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[ngForTemplate]="contentTpl" let-i="index">{{i}}: {{item}};</template></ul>`)
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.overrideTemplate(ComponentUsingTestComponent, '<test-cmp></test-cmp>')
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.createAsync(ComponentUsingTestComponent)
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.then((fixture) => {
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var testComponent = fixture.debugElement.children[0];
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testComponent.componentInstance.items = ['a', 'b', 'c'];
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fixture.detectChanges();
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expect(testComponent.nativeElement).toHaveText('0: a;1: b;2: c;');
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async.done();
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});
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}));
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it('should use a custom template when both default and a custom one are present',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
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tcb.overrideTemplate(TestComponent, `<ul><template ngFor let-item [ngForOf]="items"
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[ngForTemplate]="contentTpl" let-i="index">{{i}}=> {{item}};</template></ul>`)
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.overrideTemplate(
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ComponentUsingTestComponent,
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'<test-cmp><li template="let item; let i=index">{{i}}: {{item}};</li></test-cmp>')
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.createAsync(ComponentUsingTestComponent)
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.then((fixture) => {
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var testComponent = fixture.debugElement.children[0];
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testComponent.componentInstance.items = ['a', 'b', 'c'];
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fixture.detectChanges();
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expect(testComponent.nativeElement).toHaveText('0: a;1: b;2: c;');
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async.done();
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});
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}));
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describe('track by', function() {
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it('should not replace tracked items',
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inject(
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[TestComponentBuilder, AsyncTestCompleter],
|
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(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
|
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var template =
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`<template ngFor let-item [ngForOf]="items" [ngForTrackBy]="trackById" let-i="index">
|
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<p>{{items[i]}}</p>
|
|
</template>`;
|
|
tcb.overrideTemplate(TestComponent, template)
|
|
.createAsync(TestComponent)
|
|
.then((fixture) => {
|
|
var buildItemList =
|
|
() => {
|
|
fixture.debugElement.componentInstance.items = [{'id': 'a'}];
|
|
fixture.detectChanges();
|
|
return fixture.debugElement.queryAll(By.css('p'))[0];
|
|
}
|
|
|
|
var firstP = buildItemList();
|
|
var finalP = buildItemList();
|
|
expect(finalP.nativeElement).toBe(firstP.nativeElement);
|
|
async.done();
|
|
});
|
|
}));
|
|
it('should update implicit local variable on view',
|
|
inject(
|
|
[TestComponentBuilder, AsyncTestCompleter],
|
|
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
|
|
var template =
|
|
`<div><template ngFor let-item [ngForOf]="items" [ngForTrackBy]="trackById">{{item['color']}}</template></div>`;
|
|
tcb.overrideTemplate(TestComponent, template)
|
|
.createAsync(TestComponent)
|
|
.then((fixture) => {
|
|
fixture.debugElement.componentInstance.items = [{'id': 'a', 'color': 'blue'}];
|
|
fixture.detectChanges();
|
|
expect(fixture.debugElement.nativeElement).toHaveText('blue');
|
|
fixture.debugElement.componentInstance.items = [{'id': 'a', 'color': 'red'}];
|
|
fixture.detectChanges();
|
|
expect(fixture.debugElement.nativeElement).toHaveText('red');
|
|
async.done();
|
|
});
|
|
}));
|
|
it('should move items around and keep them updated ',
|
|
inject(
|
|
[TestComponentBuilder, AsyncTestCompleter],
|
|
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
|
|
var template =
|
|
`<div><template ngFor let-item [ngForOf]="items" [ngForTrackBy]="trackById">{{item['color']}}</template></div>`;
|
|
tcb.overrideTemplate(TestComponent, template)
|
|
.createAsync(TestComponent)
|
|
.then((fixture) => {
|
|
fixture.debugElement.componentInstance.items =
|
|
[{'id': 'a', 'color': 'blue'}, {'id': 'b', 'color': 'yellow'}];
|
|
fixture.detectChanges();
|
|
expect(fixture.debugElement.nativeElement).toHaveText('blueyellow');
|
|
fixture.debugElement.componentInstance.items =
|
|
[{'id': 'b', 'color': 'orange'}, {'id': 'a', 'color': 'red'}];
|
|
fixture.detectChanges();
|
|
expect(fixture.debugElement.nativeElement).toHaveText('orangered');
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
it('should handle added and removed items properly when tracking by index',
|
|
inject(
|
|
[TestComponentBuilder, AsyncTestCompleter],
|
|
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
|
|
var template =
|
|
`<div><template ngFor let-item [ngForOf]="items" [ngForTrackBy]="trackByIndex">{{item}}</template></div>`;
|
|
tcb.overrideTemplate(TestComponent, template)
|
|
.createAsync(TestComponent)
|
|
.then((fixture) => {
|
|
fixture.debugElement.componentInstance.items = ['a', 'b', 'c', 'd'];
|
|
fixture.detectChanges();
|
|
fixture.debugElement.componentInstance.items = ['e', 'f', 'g', 'h'];
|
|
fixture.detectChanges();
|
|
fixture.debugElement.componentInstance.items = ['e', 'f', 'h'];
|
|
fixture.detectChanges();
|
|
expect(fixture.debugElement.nativeElement).toHaveText('efh');
|
|
async.done();
|
|
});
|
|
}));
|
|
});
|
|
});
|
|
}
|
|
|
|
class Foo {
|
|
toString() { return 'foo'; }
|
|
}
|
|
|
|
@Component({selector: 'test-cmp', directives: [NgFor, NgIf], template: ''})
|
|
class TestComponent {
|
|
@ContentChild(TemplateRef) contentTpl: TemplateRef<Object>;
|
|
items: any;
|
|
constructor() { this.items = [1, 2]; }
|
|
trackById(index: number, item: any): string { return item['id']; }
|
|
trackByIndex(index: number, item: any): number { return index; }
|
|
}
|
|
|
|
@Component({selector: 'outer-cmp', directives: [TestComponent], template: ''})
|
|
class ComponentUsingTestComponent {
|
|
items: any;
|
|
constructor() { this.items = [1, 2]; }
|
|
}
|