angular-cn/packages/compiler/test/pipe_resolver_spec.ts

53 lines
1.4 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 {PipeResolver} from '@angular/compiler/src/pipe_resolver';
import {ɵstringify as stringify} from '@angular/core';
import {Pipe} from '@angular/core/src/metadata';
@Pipe({name: 'somePipe', pure: true})
class SomePipe {
}
class SimpleClass {}
export function main() {
describe('PipeResolver', () => {
let resolver: PipeResolver;
beforeEach(() => { resolver = new PipeResolver(); });
it('should read out the metadata from the class', () => {
const moduleMetadata = resolver.resolve(SomePipe);
expect(moduleMetadata).toEqual(new Pipe({name: 'somePipe', pure: true}));
});
it('should throw when simple class has no pipe decorator', () => {
expect(() => resolver.resolve(SimpleClass))
.toThrowError(`No Pipe decorator found on ${stringify(SimpleClass)}`);
});
it('should support inheriting the metadata', function() {
@Pipe({name: 'p'})
class Parent {
}
class ChildNoDecorator extends Parent {}
@Pipe({name: 'c'})
class ChildWithDecorator extends Parent {
}
expect(resolver.resolve(ChildNoDecorator)).toEqual(new Pipe({name: 'p'}));
expect(resolver.resolve(ChildWithDecorator)).toEqual(new Pipe({name: 'c'}));
});
});
}