本文整理匯總了TypeScript中@angular/core/testing.TestBed.overrideProvider方法的典型用法代碼示例。如果您正苦於以下問題：TypeScript TestBed.overrideProvider方法的具體用法？TypeScript TestBed.overrideProvider怎麽用？TypeScript TestBed.overrideProvider使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類@angular/core/testing.TestBed的用法示例。
在下文中一共展示了TestBed.overrideProvider方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: it
it('can override service by type', async(() => {
TestBed.overrideProvider(Adder, {
useValue: {
add(a, b) {
return 123;
}
}
});
const calculator: Calculator = TestBed.get(Calculator);
expect(calculator.add(2, 3)).toBe(123);
}));示例2: it
it('should allow to override a provider', () => {
resetTestEnvironmentWithSummaries(summaries);
const overwrittenValue = {};
const fixture =
TestBed.overrideProvider(SomeDep, {useFactory: () => overwrittenValue, deps: []})
.configureTestingModule({providers: [SomeDep], imports: [SomeModule]})
.createComponent<SomePublicComponent>(SomePublicComponent);
expect(fixture.componentInstance.dep).toBe(overwrittenValue);
});示例3: it
it('allows provider override in JIT for root-scoped @Injectables', () => {
@Injectable({
providedIn: 'root',
useValue: new Service('default'),
})
class Service {
constructor(readonly value: string) {}
}
TestBed.configureTestingModule({});
TestBed.overrideProvider(Service, {useValue: new Service('overridden')});
expect(TestBed.get(Service).value).toEqual('overridden');
});