是否有一些方法来测试内部实现，当响应在Observable是500(错误发生)

Question

下面的代码

@Output() hitCodeReturned = new EventEmitter<boolean>();
ngOnInit() {
this.someService.method().subscribe(
() => {
// Some code here
},
({ error }) => {
if (condition equals true) {
this.hitCodeReturned.emit(true);
}
}
);

}

测试应该确保当响应返回带有某些正文的错误时将触发true

Answer 1

是，在测试中只使用throwError算子

//in jasmine/karma test
//assuming that someService is a `mock`
it('propagates hitCodeReturned', (done)=>{

someService.and.return(throwError("here you can throw any kind of error"));
component.hitCodeReturned().subscribe(code=>{
expect(code).toBeTrue();
done();
});
component.ngOnInit();


}