angular-cn/packages/zone.js/test/jasmine-patch.spec.ts
JiaLiPassion c2b4d92708 feat(zone.js): patch jasmine.createSpyObj to make properties enumerable to be true (#34624)
Close #33657

in jasmine 3.5, there is a new feature, user can pass a properties object to `jasmine.createSpyObj`

```
const spy = jasmine.createSpyObj('spy', ['method1'], {prop1: 'foo'});
expect(spy.prop1).toEqual('foo');
```

This case will not work for Angular TestBed, for example,

```
describe('AppComponent', () => {
  beforeEach(() => {

    //Note the third parameter
    // @ts-ignore
    const someServiceSpy = jasmine.createSpyObj('SomeService', ['someFunction'], ['aProperty']);

    TestBed.configureTestingModule({
      declarations: [
        AppComponent
      ],
      providers: [
        {provide: SomeService, useValue: someServiceSpy},
      ]
    }).compileComponents();

  });

  it('should create the app', () => {
    //spyObj will have someFunction, but will not have aProperty
    let spyObj = TestBed.get(SomeService);
  });
```

Because `jasmine.createSpyObj` will create the `aProperty` with `enumerable=false`,
and `TestBed.configureTestingModule` will try to copy all the properties from spyObj to
the injected service instance. And because `enumerable` is false, so the property (here is aProperty)
will not be copied.

This PR will monkey patch the `jasmine.createSpyObj` and make sure the new property's
`enumerable=true`.

PR Close #34624
2020-06-29 12:22:08 -07:00

91 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 {ifEnvSupports} from './test-util';
function supportJasmineSpec() {
return jasmine && (jasmine as any)['Spec'];
}
(supportJasmineSpec as any).message = 'jasmine spec';
ifEnvSupports(supportJasmineSpec, () => {
beforeEach(() => {
// assert that each jasmine run has a task, so that drainMicrotask works properly.
expect(Zone.currentTask).toBeTruthy();
});
describe('jasmine', () => {
let throwOnAsync = false;
let beforeEachZone: Zone|null = null;
let beforeAllZone: Zone|null = null;
let itZone: Zone|null = null;
const syncZone = Zone.current;
try {
Zone.current.scheduleMicroTask('dontallow', (): any => null);
} catch (e) {
throwOnAsync = true;
}
beforeAll(() => beforeAllZone = Zone.current);
beforeEach(() => beforeEachZone = Zone.current);
it('should throw on async in describe', () => {
expect(throwOnAsync).toBe(true);
expect(syncZone.name).toEqual('syncTestZone for jasmine.describe');
itZone = Zone.current;
});
it('should cope with pending tests, which have no test body');
afterEach(() => {
let zone = Zone.current;
expect(zone.name).toEqual('ProxyZone');
expect(beforeEachZone!.name).toEqual(zone.name);
expect(itZone).toBe(zone);
});
afterAll(() => {
let zone = Zone.current;
expect(zone.name).toEqual('ProxyZone');
expect(beforeAllZone!.name).toEqual(zone.name);
});
});
describe('return promise', () => {
let log: string[];
beforeEach(() => {
log = [];
});
it('should wait for promise to resolve', () => {
return new Promise((res, _) => {
setTimeout(() => {
log.push('resolved');
res();
}, 100);
});
});
afterEach(() => {
expect(log).toEqual(['resolved']);
});
});
describe('jasmine.createSpyObj', () => {
it('createSpyObj with properties should be able to be retrieved from the spy', () => {
const spy = jasmine.createSpyObj('obj', ['someFunction'], {prop1: 'foo'});
expect(spy.prop1).toEqual('foo');
const desc: any = Object.getOwnPropertyDescriptor(spy, 'prop1');
expect(desc.enumerable).toBe(true);
expect(desc.configurable).toBe(true);
});
});
})();