get_mock_gin.go

// code
func GetUserId(c *gin.Context) {

     fmt.Println(c.Query("foo"))  //will print "bar" while running test
     fmt.Println(c.Param("id"))    // will print "1" while running test

     id, _ := strconv.Atoi(c.Param("id"))
     c.JSON(http.StatusOK, id)
}


// test
func TestGetUserId(t *testing.T) {
     w := httptest.NewRecorder()

     ctx := GetTestGinContext(w)

     //configure path params
     params := []gin.Param{
		{
			Key:   "id",
			Value: "1",
		},
	}

     // configure query params
     u := url.Values{}
     u.Add("foo", "bar")

     MockJsonGet(ctx, params, u)

     GetUserId(ctx)

     assert.EqualValues(t, http.StatusOK, w.Code)

     got, _ := strconv.Atoi(w.Body.String())

     assert.Equal(t, 1, got)
}

//mock gin context
func GetTestGinContext(w *httptest.ResponseRecorder) *gin.Context {
     gin.SetMode(gin.TestMode)

     ctx, _ := gin.CreateTestContext(w)
     ctx.Request = &http.Request{
	 Header: make(http.Header),
	 URL:    &url.URL{},
     }

     return ctx
}

//mock getrequest
func MockJsonGet(c *gin.Context, params gin.Params, u url.Values) {
     c.Request.Method = "GET"
     c.Request.Header.Set("Content-Type", "application/json")
     c.Set("user_id", 1)

     // set path params
     c.Params = params

     // set query params
     c.Request.URL.RawQuery = u.Encode()
}