angular-docs-cn/packages/core/test/application_init_spec.ts

78 lines
2.5 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 {Injector} from '@angular/core';
import {APP_INITIALIZER, ApplicationInitStatus} from '@angular/core/src/application_init';
import {inject, TestBed, waitForAsync} from '../testing';
{
describe('ApplicationInitStatus', () => {
describe('no initializers', () => {
it('should return true for `done`',
waitForAsync(inject([ApplicationInitStatus], (status: ApplicationInitStatus) => {
(status as any).runInitializers();
expect(status.done).toBe(true);
})));
it('should return a promise that resolves immediately for `donePromise`',
waitForAsync(inject([ApplicationInitStatus], (status: ApplicationInitStatus) => {
(status as any).runInitializers();
status.donePromise.then(() => {
expect(status.done).toBe(true);
});
})));
});
describe('with async initializers', () => {
let resolve: (result: any) => void;
let promise: Promise<any>;
let completerResolver = false;
beforeEach(() => {
let initializerFactory = (injector: Injector) => {
return () => {
const initStatus = injector.get(ApplicationInitStatus);
initStatus.donePromise.then(() => {
expect(completerResolver).toBe(true);
});
};
};
promise = new Promise((res) => {
resolve = res;
});
TestBed.configureTestingModule({
providers: [
{provide: APP_INITIALIZER, multi: true, useValue: () => promise},
{
provide: APP_INITIALIZER,
multi: true,
useFactory: initializerFactory,
deps: [Injector]
},
]
});
});
it('should update the status once all async initializers are done',
waitForAsync(inject([ApplicationInitStatus], (status: ApplicationInitStatus) => {
(status as any).runInitializers();
setTimeout(() => {
completerResolver = true;
resolve(null);
});
expect(status.done).toBe(false);
status.donePromise.then(() => {
expect(status.done).toBe(true);
expect(completerResolver).toBe(true);
});
})));
});
});
}