05 Request Form Post

func FormPostHandler(w http.ResponseWriter, r *http.Request) {
	err := r.ParseForm()
	if err != nil {
		panic(err)
	}

	firstName := r.PostForm.Get("first_name")
	lastName := r.PostForm.Get("last_name")
	fmt.Fprintf(w, "%s %s", firstName, lastName)
}

func TestFormPostHandler(t *testing.T) {
	type args struct {
		firstName string
		lastName  string
	}
	tests := []struct {
		name string
		args args
		want string
	}{
		{
			name: "set form post param",
			args: args{
				firstName: "ihsan",
				lastName:  "arif",
			},
			want: "ihsan arif",
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			requestBody := strings.NewReader(fmt.Sprintf("first_name=%s&last_name=%s", tt.args.firstName, tt.args.lastName))
			request := httptest.NewRequest(http.MethodPost, "http://localhost/say", requestBody)
			request.Header.Add("Content-Type", "application/x-www-form-urlencoded")
			recorder := httptest.NewRecorder()
			FormPostHandler(recorder, request)

			response := recorder.Result()
			body, _ := io.ReadAll(response.Body)
			bodyString := string(body)

			if !reflect.DeepEqual(bodyString, tt.want) {
				t.Errorf("bodyString = %v, want %v", bodyString, tt.want)
			}
		})
	}
}