我有一个服务器实现。现在,我正在编写单元测试以检查其功能。我无法准备请求,这会很好地在服务器端解组。以下代码导致InvalidUnmarshallError。我不知道,如何进一步调试它。
客户端代码:
body := PatchCatRequest{Adopted: true}
bodyBuf := &bytes.Buffer{}
err := json.NewEncoder(bodyBuf).Encode(body)
assert.NoError(t, err)
req, err := http.NewRequest("PATCH", URL+"/"+catId, bodyBuf)
recorder := httptest.NewRecorder()
handler.PatchCat(recorder, req.WithContext(ctx))
服务器端代码:
type PatchCatRequest struct {
Adopted bool `json:"adopted"`
}
func (h *Handler) PatchCat (rw http.ResponseWriter, req *http.Request) {
var patchRequest *PatchCatRequest
if err := json.NewDecoder(req.Body).Decode(patchRequest); err != nil {
rw.WriteHeader(http.StatusBadRequest)
logger.WithField("error", err.Error()).Error(ErrDocodeRequest.Error())
return
}
...
}
您正在编组为nil指针,如错误消息所示:
package main
import (
"encoding/json"
"fmt"
)
type PatchCatRequest struct {
Adopted bool
}
func main() {
var patchRequest *PatchCatRequest // nil pointer
err := json.Unmarshal([]byte(`{"Adopted":true}`), patchRequest)
fmt.Println(err) // json: Unmarshal(nil *main.PatchCatRequest)
}
https://play.golang.org/p/vt7t5BgT3lA
解组前初始化指针:
func main() {
patchRequest := new(PatchCatRequest) // non-nil pointer
err := json.Unmarshal([]byte(`{"Adopted":true}`), patchRequest)
fmt.Println(err) // <nil>
}