angular-cn/packages/common/test/pipes/json_pipe_spec.ts

79 lines
2.4 KiB
TypeScript
Raw Normal View History

/**
* @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 {CommonModule, JsonPipe} from '@angular/common';
import {Component} from '@angular/core';
import {TestBed, async} from '@angular/core/testing';
import {expect} from '@angular/platform-browser/testing/src/matchers';
export function main() {
describe('JsonPipe', () => {
const regNewLine = '\n';
let inceptionObj: any;
let inceptionObjString: string;
let pipe: JsonPipe;
function normalize(obj: string): string { return obj.replace(regNewLine, ''); }
beforeEach(() => {
inceptionObj = {dream: {dream: {dream: 'Limbo'}}};
inceptionObjString = '{\n' +
' "dream": {\n' +
' "dream": {\n' +
' "dream": "Limbo"\n' +
' }\n' +
' }\n' +
'}';
pipe = new JsonPipe();
});
describe('transform', () => {
it('should return JSON-formatted string',
() => { expect(pipe.transform(inceptionObj)).toEqual(inceptionObjString); });
it('should return JSON-formatted string even when normalized', () => {
const dream1 = normalize(pipe.transform(inceptionObj));
const dream2 = normalize(inceptionObjString);
expect(dream1).toEqual(dream2);
});
it('should return JSON-formatted string similar to Json.stringify', () => {
const dream1 = normalize(pipe.transform(inceptionObj));
const dream2 = normalize(JSON.stringify(inceptionObj, null, 2));
expect(dream1).toEqual(dream2);
});
});
describe('integration', () => {
@Component({selector: 'test-comp', template: '{{data | json}}'})
class TestComp {
data: any;
}
beforeEach(() => {
TestBed.configureTestingModule({declarations: [TestComp], imports: [CommonModule]});
});
it('should work with mutable objects', async(() => {
const fixture = TestBed.createComponent(TestComp);
const mutable: number[] = [1];
fixture.componentInstance.data = mutable;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('[\n 1\n]');
mutable.push(2);
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('[\n 1,\n 2\n]');
}));
});
});
}