dependency injection mocking

go-dependency-inject-mock.go

package main

import (
	"bytes"
	"io/ioutil"
	"net/http"
	"testing"
)

type MockHttpClient struct{}

func (m *MockHttpClient) Get(url string) (*http.Response, error) {
	response := &http.Response{
		Body: ioutil.NopCloser(bytes.NewBuffer([]byte("Test response"))),
	}

	return response, nil

}

func (m *MockHttpClient) Post(url string, contentType string, body io.Reader) (*http.Response, error) {
	response := &http.Response{
		Body: ioutil.NopCloser(bytes.NewBuffer([]byte("Response"))),
	}

	return response, nil
}

func TestSendWithValidResponse(t *testing.T) {
	httpClient := &MockHttpClient{}
	err := send(httpClient, "IT_JUST_WORKS!")

	if err != nil {
		t.Errorf("Shouldn't have received an error with a valid MockHttpClient, got %s", err)
	}
}