main_test.go

package main

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

func TestHelloHandler(t *testing.T) {
	// Create a request to the /hello endpoint (GET method)
	req, err := http.NewRequest("GET", "/hello", nil)
	if err != nil {
		t.Fatal(err)
	}

	// Create a ResponseRecorder to record the response
	rr := httptest.NewRecorder()

	// Call the helloHandler with the request and response recorder
	helloHandler(rr, req)

	// Check the status code
	if status := rr.Code; status != http.StatusOK {
		t.Errorf("Handler returned wrong status code: got %v want %v", status, http.StatusOK)
	}

	// Check the response body
	expected := "Hello! From DevOps Sri Lanka\n"
	if body := rr.Body.String(); body != expected {
		t.Errorf("Handler returned unexpected body: got %v want %v", body, expected)
	}
}