69 lines
2.2 KiB
TypeScript
69 lines
2.2 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 {Directive as _Directive, Pipe as _Pipe, PipeTransform, WrappedValue, ɵɵdefinePipe} from '@angular/core';
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import {expect} from '@angular/platform-browser/testing/src/matchers';
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import {ɵɵinterpolation1, ɵɵtext, ɵɵtextBinding} from '../../src/render3/instructions/all';
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import {ɵɵpipe, ɵɵpipeBind1} from '../../src/render3/pipe';
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import {TemplateFixture} from './render_util';
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const Pipe: typeof _Pipe = function(...args: any[]): any {
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// In test we use @Pipe for documentation only so it's safe to mock out the implementation.
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return () => undefined;
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} as any;
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// TODO: hasn't been moved over into acceptance, because the `WrappedValue` tests need to
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// use an impure pipe which always throws "changed after checked errors" with `TestBed`
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// both in Ivy and ViewEngine.
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describe('pipe', () => {
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describe('WrappedValue', () => {
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@Pipe({name: 'wrappingPipe'})
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class WrappingPipe implements PipeTransform {
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transform(value: any) { return new WrappedValue('Bar'); }
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static ngPipeDef = ɵɵdefinePipe({
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name: 'wrappingPipe',
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type: WrappingPipe,
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factory: function WrappingPipe_Factory() { return new WrappingPipe(); },
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pure: false
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});
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}
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function createTemplate() {
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ɵɵtext(0);
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ɵɵpipe(1, 'wrappingPipe');
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}
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function updateTemplate() {
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ɵɵtextBinding(0, ɵɵinterpolation1('', ɵɵpipeBind1(1, 1, null), ''));
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}
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it('should unwrap', () => {
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const fixture =
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new TemplateFixture(createTemplate, updateTemplate, 2, 3, undefined, [WrappingPipe]);
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expect(fixture.html).toEqual('Bar');
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});
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it('should force change detection', () => {
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const fixture =
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new TemplateFixture(createTemplate, updateTemplate, 2, 3, undefined, [WrappingPipe]);
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expect(fixture.html).toEqual('Bar');
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fixture.hostElement.childNodes[0] !.textContent = 'Foo';
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expect(fixture.html).toEqual('Foo');
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fixture.update();
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expect(fixture.html).toEqual('Bar');
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});
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});
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});
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