angular-docs-cn/packages/common/test/pipes/date_pipe_spec.ts

77 lines
2.4 KiB
TypeScript

/**
* @license
* Copyright Google LLC 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 {DatePipe} from '@angular/common';
import localeEn from '@angular/common/locales/en';
import localeEnExtra from '@angular/common/locales/extra/en';
import {PipeResolver} from '@angular/compiler/src/pipe_resolver';
import {ɵregisterLocaleData, ɵunregisterLocaleData} from '@angular/core';
import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_reflector';
{
let date: Date;
describe('DatePipe', () => {
const isoStringWithoutTime = '2015-01-01';
let pipe: DatePipe;
beforeAll(() => ɵregisterLocaleData(localeEn, localeEnExtra));
afterAll(() => ɵunregisterLocaleData());
beforeEach(() => {
date = new Date(2015, 5, 15, 9, 3, 1, 550);
pipe = new DatePipe('en-US');
});
it('should be marked as pure', () => {
expect(new PipeResolver(new JitReflector()).resolve(DatePipe)!.pure).toEqual(true);
});
describe('supports', () => {
it('should support date', () => {
expect(() => pipe.transform(date)).not.toThrow();
});
it('should support int', () => {
expect(() => pipe.transform(123456789)).not.toThrow();
});
it('should support numeric strings', () => {
expect(() => pipe.transform('123456789')).not.toThrow();
});
it('should support decimal strings', () => {
expect(() => pipe.transform('123456789.11')).not.toThrow();
});
it('should support ISO string',
() => expect(() => pipe.transform('2015-06-15T21:43:11Z')).not.toThrow());
it('should return null for empty string', () => {
expect(pipe.transform('')).toEqual(null);
});
it('should return null for NaN', () => {
expect(pipe.transform(Number.NaN)).toEqual(null);
});
it('should support ISO string without time', () => {
expect(() => pipe.transform(isoStringWithoutTime)).not.toThrow();
});
it('should not support other objects', () => {
expect(() => pipe.transform({})).toThrowError(/InvalidPipeArgument/);
});
});
describe('transform', () => {
it('should use "mediumDate" as the default format',
() => expect(pipe.transform('2017-01-11T10:14:39+0000')).toEqual('Jan 11, 2017'));
});
});
}