fix(test): configurar jest-dom para tests de componente

frontend/src/setupTests.js

@@ -0,0 +1,19 @@
+/*
+CI/CD Workshop
+Copyright (C) 2025 OpenBokeron
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import '@testing-library/jest-dom';

frontend/vite.config.js

@@ -14,6 +14,7 @@ export default defineConfig(({ mode }) => {
         test: {
             environment: 'jsdom',
             globals: true,
+            setupFiles: ['./src/setupTests.js'],
         },
         server: {
             port: 5173,