Added a first test for HealthHandler

internal/api/handler/health_test.go

@@ -0,0 +1,25 @@
+package handler_test
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/robindittmar/dttmr-api/internal/api/handler"
+)
+
+func TestHealthHandler_Success(t *testing.T) {
+	req := httptest.NewRequest(http.MethodGet, "/health", nil)
+	rr := httptest.NewRecorder()
+
+	handler.HealthHandler(rr, req)
+
+	if rr.Code != http.StatusOK {
+		t.Errorf("HealthHandler returned wrong status code: got %v want %v", rr.Code, http.StatusOK)
+	}
+
+	expected := `{"status":"ok"}`
+	if rr.Body.String() != expected {
+		t.Errorf("HealthHandler returned unexpected body: got %v want %v", rr.Body.String(), expected)
+	}
+}