Implemented first test

internal/ping_test.go

@@ -0,0 +1,39 @@
+package internal
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/joho/godotenv"
+)
+
+type pingFormat struct {
+	Message string `json:"message"`
+}
+
+func TestPing(t *testing.T) {
+	godotenv.Load("../.env")
+
+	r := gin.Default()
+	r.GET("/ping/", Ping)
+	go r.Run(":" + os.Getenv("API_PORT"))
+
+	req, err := http.Get(fmt.Sprintf("http://localhost:%v/ping/", os.Getenv("API_PORT")))
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	defer req.Body.Close()
+
+	var exceptedResp = pingFormat{}
+	body, _ := io.ReadAll(req.Body)
+	json.Unmarshal(body, &exceptedResp)
+
+	if exceptedResp.Message != "pong" {
+		t.Fatalf(`/ping/ resulted in "%v" instead of "pong"`, exceptedResp.Message)
+	}
+}