我有一个名为 user-service.go 的文件和相应的测试文件,名为 user-service_test.go。当我试图获得完整的代码覆盖率时,我正在努力让一些错误情况真正发生。
这是函数:GetOrCreateByAccessToken()
//GetOrCreateByAccessToken gets a user from the database with the given access token
func (s *service) GetOrCreateByAccessToken(aT string, client *Client) (*user.User, fcerr.FCErr) {
var currentUser user.OauthUser
req, err := http.NewRequest("GET", "https://openidconnect.googleapis.com/v1/userinfo?access_token="+aT, nil)
if err != nil {
return nil, fcerr.NewInternalServerError("Error when setting up the network request")
}
response, err := client.httpClient.Do(req)
if err != nil {
fmt.Println("error when getting the userinfo with the access token")
return nil, fcerr.NewInternalServerError("Error when trying to verify user identity")
}
defer response.Body.Close()
contents, err := io.ReadAll(response.Body)
if err != nil {
return nil, fcerr.NewInternalServerError("Error when trying to read response from Google about user identity")
}
我对测试的主要控制是我可以传入 *Client.
这是测试用例的一部分,我想让 io.ReadAll 抛出错误:
h := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
//manually return the message google would return on an actual request
w.Write([]byte(googleAPIOKResponse))
})
//Call the testHTTPClient() function defined in the test file to substitute my own HandlerFunc
httpClient, teardown := testHTTPClient(h)
defer teardown()
//Call the real NewClient() from my user-service.go
client := NewClient()
//Substitute the default httpClient for the one I've just set up.
client.httpClient = httpClient
resultingUser, err := userService.GetOrCreateByAccessToken(nU.AccessToken, client)
assert.Nil(t, resultingUser)
assert.NotNil(t, err)
assert.Equal(t, http.StatusInternalServerError, err.Status())
有没有什么地方我可以编写自己的 .Do() 方法版本,它会在响应中放入一些内容,从而导致 io.ReadAll 返回错误?或者有没有更好的方法来使用我已经在使用的预烘焙响应文本来实现错误?
没有替代 Do 方法的方法,但有一种方法可以实现您的目标。
创建一个返回任意响应正文的往返类型:
type respondWithReader struct{ body io.Reader }
func (rr respondWithReader) RoundTrip(req *http.Request) (*http.Response, error) {
return &http.Response{
Proto: "HTTP/1.0",
ProtoMajor: 1,
Header: make(http.Header),
Close: true,
Body: ioutil.NopCloser(rr.body),
}, nil
}
创建一个失败的 io.Reader:
var errReadFail = errors.New("blah!")
type failReader int
func (failReader) Read([]byte) (int, error) {
return 0, errReadFail
}
使用带有上述传输和阅读器的股票客户端:
c := http.Client{Transport: respondWithReader{body: failReader(0)}}
resp, err := c.Get("http://whatever.com")
if err != nil {
t.Error(err)
}
defer resp.Body.Close()
// ReadAll returns errReadFail
_, err = ioutil.ReadAll(resp.Body)
if err != errReadFail {
t.Errorf("got err %v, expect %v", err, errReadFail)
}
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