Add unit test for CreateLobby handler to verify successful lobby crea…

…tion

internal/lobby/create_lobby_test.go

@@ -10,6 +10,46 @@ import (
 	"github.com/jmoiron/sqlx"
 )
 
+func TestCreateLobby_Success(t *testing.T) {
+	db, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatalf("an error '%s' was not expected when opening a stub database connection", err)
+	}
+	defer db.Close()
+
+	lobby := Lobby{
+		Name:      "Test Lobby",
+		OwnerName: "Owner",
+		IsClosed:  false,
+		IsMuted:   false,
+		IsPublic:  true,
+	}
+
+	mock.ExpectQuery("INSERT INTO lobby \\(name, owner_name, is_closed, is_muted, is_public\\) VALUES \\(\\$1, \\$2, \\$3, \\$4, \\$5\\)").
+		WithArgs(lobby.Name, lobby.OwnerName, lobby.IsClosed, lobby.IsMuted, lobby.IsPublic).
+		WillReturnRows(sqlmock.NewRows([]string{"id"}).AddRow(1))
+
+	req, err := http.NewRequest("POST", "/lobby/create_lobby", strings.NewReader(`{"lobby": {"name": "Test Lobby", "owner_name": "Owner", "is_closed": false, "is_muted": false, "is_public": true}, "password": "password123"}`))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	rr := httptest.NewRecorder()
+	sqlxDB := sqlx.NewDb(db, "sqlmock")
+	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		err := CreateLobby(w, r, sqlxDB)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+		}
+	})
+
+	handler.ServeHTTP(rr, req)
+
+	if status := rr.Code; status != http.StatusCreated {
+		t.Errorf("handler returned wrong status code: got %v want %v", status, http.StatusCreated)
+	}
+}
+
 func TestCreateLobby_InvalidMethod(t *testing.T) {
 	db, _, err := sqlmock.New()
 	if err != nil {