51 lines
1.8 KiB
TypeScript
51 lines
1.8 KiB
TypeScript
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/**
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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 {DoCheck, OnChanges, SimpleChanges} from '../../src/core';
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import {NgOnChangesFeature, defineDirective} from '../../src/render3/index';
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describe('define', () => {
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describe('component', () => {
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describe('NgOnChangesFeature', () => {
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it('should patch class', () => {
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class MyDirective implements OnChanges, DoCheck {
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public log: string[] = [];
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public valA: string = 'initValue';
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public set valB(value: string) { this.log.push(value); }
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public get valB() { return 'works'; }
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ngDoCheck(): void { this.log.push('ngDoCheck'); }
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ngOnChanges(changes: SimpleChanges): void {
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this.log.push('ngOnChanges');
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this.log.push('valA', changes['valA'].previousValue, changes['valA'].currentValue);
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this.log.push('valB', changes['valB'].previousValue, changes['valB'].currentValue);
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}
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static ngDirectiveDef = defineDirective({
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factory: () => new MyDirective(),
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features: [NgOnChangesFeature(MyDirective)],
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inputs: {valA: 'valA', valB: 'valB'}
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});
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}
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const myDir = MyDirective.ngDirectiveDef.n();
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myDir.valA = 'first';
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expect(myDir.valA).toEqual('first');
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myDir.valB = 'second';
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expect(myDir.log).toEqual(['second']);
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expect(myDir.valB).toEqual('works');
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myDir.log.length = 0;
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myDir.ngDoCheck();
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expect(myDir.log).toEqual([
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'ngOnChanges', 'valA', 'initValue', 'first', 'valB', undefined, 'second', 'ngDoCheck'
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]);
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});
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});
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});
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});
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