我正在对一个组件进行单元测试,这就是我所拥有的:
describe('Component: nav', () => {
beforeEach(() => addProviders([
provide(UserService, {useClass: MockUserService}),
NavComponent
]));
it('should have a property \'firstName\' with the value \'Crazypug\'',
async(inject([NavComponent], (component) => {
component.ngOnInit();
expect(component.firstName).toEqual('Crazypug')
}))
);
});
这是ngOnInit函数:
ngOnInit() {
this.userService.getFirstNameCall().subscribe(
data => {this.firstName = data.firstname; });
}
当我运行测试时,我得到:
预期未定义为'Crazypug'
如何让Jasmine等待ngOnInit函数完成? 我从很久以前就在SO上找到了一些解决方案(以角度2的方式)。他们非常复杂或过时。
答案 0 :(得分:16)
您应该替换async
fakeAsync
功能
import {..., tick, fakeAsync} from '@angular/core/testing';
...
fakeAsync(inject([NavComponent], (component) => {
component.ngOnInit();
tick();
expect(component.firstName).toEqual('Crazypug')
}))