exampe_test.go

func TestHandler(t *testing.T) {
	testcases := []struct {
		name    string
		request *http.Request
		code    int
	}{
		{
			name:    "Wrong-Method",
			request: NewRequest(t, http.MethodGet, "/", nil),
			code:    405,
		},
	}

	//Bring your attention here
	res := httptest.NewRecorder()

	for _, tc := range testcases {
		Handler().ServeHTTP(res, tc.request)

		t.Run(tc.name, func(t *testing.T) {
			t.Run("Assert-Code", func(t *testing.T) {
				assertCode(t, res.Code, tc.code)
			})

			t.Run("Response-Body-Format", func(t *testing.T) {
				t.Logf("logging:%s", res.Body.String())
			})
		})
    //And here
		res.Flush()
	}
}