How to test API with Golang.

Hi there!

I needed to test a few requests I do in my API and then I will show to you how I did that.

First things first, you need to create an application and a file with routes:

main.go

package main

import (
    "net/http"

    "devto.com/v1/src/router"
)

func main() {
    /// Start server with Routes
    http.ListenAndServe(":3333", router.Routes())
}

router\router.go

package router

import (
    "net/http"

    "github.com/go-chi/chi"
    "github.com/go-chi/chi/middleware"
)


func Routes() *chi.Mux {
    r := chi.NewRouter()
    r.Use(middleware.Logger)
    r.Use(middleware.Recoverer)

    r.Get("/info", func(w http.ResponseWriter, r *http.Request) {
                w.WriteHeader(http.StatusOK)
        w.Write([]byte(":)"))
    })

    return r
}

Then we're gonna make our test for that request called info.

tests\integration\info_test.go

package integration

import (
    "net/http"
    "net/http/httptest"
    "testing"

    "devto.com/v1/src/router"
)

func TestInfoRequest(t *testing.T) {
    // Set up a new request.
    req, err := http.NewRequest("GET", "/info", nil)
    if err != nil {
        t.Fatal(err)
    }

    newRecorder := httptest.NewRecorder()

    router.Routes().ServeHTTP(newRecorder, req)

    statusCode := 200
    if newRecorder.Result().StatusCode != statusCode {
        t.Errorf("TestInfoRequest() test returned an unexpected result: got %v want %v", newRecorder.Result().StatusCode, statusCode)
    }
}

That's all! I hope it helps you to get your integration tests working.