Comment se moquer efficacement du BindJSON de gin.Context dans les tests unitaires Go ?

w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)

c.Request = &http.Request{
    Header: make(http.Header),
}

func MockJsonPost(c *gin.Context, content interface{}) {
    c.Request.Method = "POST"
    c.Request.Header.Set("Content-Type", "application/json")

    jsonbytes, err := json.Marshal(content)
    if err != nil {
        panic(err)
    }

    c.Request.Body = io.NopCloser(bytes.NewBuffer(jsonbytes))
}

func TestPostImageToDBDao(t *testing.T) {
    w := httptest.NewRecorder()
    ctx, _ := gin.CreateTestContext(w) 

    ctx.Request = &http.Request{
        Header: make(http.Header),
    }

    MockJsonPost(ctx, map[string]interface{}{
        "articleUUID": "bea1b24d-0627-4ea0-aa2b-8af4c6c2a41c",
        "imageNames":  "b8119536-fad5-4ffa-ab71-2f96cca19697",
    })

    PostImageToDBDao(ctx)
    assert.EqualValues(t, http.StatusOK, w.Code)
}