我正在尝试为收到unit test
响应的函数调用http.post
。
handleSuccessResponseForUserProfileRequest(res: HttpSentEvent|HttpHeaderResponse|HttpResponse<any>|HttpProgressEvent|HttpUserEvent<any>) {
const ev = <HttpEvent<any>>(res);
if (ev.type === HttpEventType.Response) {
console.log('response from server: body ',ev.body);
const isResponseStructureOK: boolean = this.helper.validateServerResponseStructure(ev.body);
if (isResponseStructureOK) {
const response: ServerResponseAPI = ev.body;
this.userProfileSubject.next(new Result(response.result, response['additional-info']));
} else {
this.userProfileSubject.next(new Result('error', 'Invalid response structure from server'));
}
} else {
}
}
validateServerResponseStructure
检查响应的结构是否正确。它应该具有result
和additional-info
键
validateServerResponseStructure(res: any): boolean {
const keys = Object.keys(res);
const isTypeCorrect: boolean = (
['result', 'additional-info'].every(key => keys.includes(key))
&& keys.length === 2);
return isTypeCorrect;
}
我写的单位案例是
fit('should return if user information isn\'t stored', () => {
const body = JSON.stringify({"result":"success", "additional-info":"some additional info"});
const receivedHttpEvent = new HttpResponse({body:body});
const userService: UserManagementService = TestBed.get(UserManagementService);
const helperService:HelperService = TestBed.get(HelperService);
spyOn(userService['userProfileSubject'],'next');
//spyOn(helperService,'validateServerResponseStructure').and.returnValue(true);
userService.handleSuccessResponseForUserProfileRequest(receivedHttpEvent);
const expectedResult = new Result('success', 'some additional info');
expect(userService['userProfileSubject'].next).toHaveBeenCalledWith(expectedResult);
});
[如果我没有在spy
上使用validateServerResponseStructure
,那么我的测试用例将失败,因为validateServerResponseStructure
失败了,尽管在我看来,该结构还可以。
Expected spy next to have been called with [ Result({ result: 'success', additionalInfo: 'some additional info' }) ] but actual calls were [ Result({ result: 'error', additionalInfo: 'Invalid response structure from server' }) ].
如果我监视validateServerResponseStructure
并返回true
,则会出现错误
Expected spy next to have been called with [ Result({ result: 'success', additionalInfo: 'some additional info' }) ] but actual calls were [ Result({ result: undefined, additionalInfo: undefined }) ].
有趣的是,如果我添加以下两个打印件,它们将显示不同的值!
console.log('extracted response ',response);
console.log('sending response '+response.result + 'and additional info' +response['additional-info']);
我知道
extracted response {"result":"success","additional-info":"some additional info"}
sending response undefined and additional info undefined
我在做什么错?
有趣的是,如果我将单元测试中type
中的<T>
httpResponse
更改为Object
而不是string
,则该代码有效。
const body = {"result":"success", "additional-info":"some additional info"};
const receivedHttpEvent = new HttpResponse({body:body});