本文整理汇总了TypeScript中@angular/core/testing.TestBed.overrideProvider方法的典型用法代码示例。如果您正苦于以下问题：TypeScript TestBed.overrideProvider方法的具体用法？TypeScript TestBed.overrideProvider怎么用？TypeScript TestBed.overrideProvider使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类@angular/core/testing.TestBed的用法示例。
在下文中一共展示了TestBed.overrideProvider方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
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');
});