http 测试
最后更新于：2022-04-02 02:51:42
[TOC]
## demo
使用 httptest.NewRecorder 来测试 HTTP Handler 而不需要真正进行 HTTP 监听
可以使用 errorReader 来提高测试覆盖率
```
ype errorReader struct{}
func (errorReader) Read(p []byte) (n int, err error) {
return 0, errors.New("mock body error")
}
func TestLoginHandler(t *testing.T) {
testCases := []struct {
Name string
Code int
Body interface{}
}{
{"ok", 200, `{"code":"a@example.com", "password":"password"}`},
{"read body error", 500, new(errorReader)},
{"invalid format", 400, `{"code":1, "password":"password"}`},
{"invalid code", 400, `{"code":"a@example.com1", "password":"password"}`},
{"invalid password", 400, `{"code":"a@example.com", "password":"password1"}`},
}
for _, tc := range testCases {
t.Run(tc.Name, func(t *testing.T) {
var body io.Reader
if stringBody, ok := tc.Body.(string); ok {
body = strings.NewReader(stringBody)
} else {
body = tc.Body.(io.Reader)
}
req := httptest.NewRequest("POST", "http://example.com/foo", body)
w := httptest.NewRecorder()
LoginHandler(w, req)
resp := w.Result()
if resp.StatusCode != tc.Code {
t.Errorf("response code is invalid, expect=%d but got=%d",
tc.Code, resp.StatusCode)
}
})
}
}
```
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