simple test scenario using net/http/httptest

user_test.go

type getUserTestCase struct {
        Tag string
        ID  string
        Expected *UserResponse
}

func DummyHandler(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
        w.Header().Set("Content-Type", "application/json")

        io.WriteString(w, `{"placeholder": value}`)
}

func TestGetUsers(t *testing.T){
        fmt.Println("Running TestGetUsers...")
        c := getUserTestCase{
                Tag: "Case 1 - Basic deserialization",
                ID:  "1000",
                Expected: &UserResponse{
                        Data: User{
                                ID: 1,
                                FullName: "John Smith",
                                Email: "john.smith@gmail.com",
                                Country: "Antigua",
                                Language: "Dutch",
                                LastIP: "10.10.10.10",
                        },
                },
        }

        httpClient := &http.Client{Timeout: time.Second * 10}
        tServer := httptest.NewServer(http.HandlerFunc(DummyHandler))
        defer tServer.Close()

        actual, _ := GetUserData(httpClient, tServer.URL, c.ID)
        if !reflect.DeepEqual(actual, c.Expected) {
                t.Errorf(
                        "Unmarshalled value '%v' did not match expected value '%v'\n",
                        actual, c.Expected)
        }
}