frontend-test-utils: updates to work with new extension IDs

Co-authored-by: Camila Belo <camilaibs@gmail.com>
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/tech-radar/package.json

@@ -68,6 +68,7 @@
     "@backstage/cli": "workspace:^",
     "@backstage/core-app-api": "workspace:^",
     "@backstage/dev-utils": "workspace:^",
+    "@backstage/frontend-test-utils": "workspace:^",
     "@backstage/test-utils": "workspace:^",
     "@testing-library/dom": "^9.0.0",
     "@testing-library/jest-dom": "^6.0.0",

plugins/tech-radar/src/alpha.test.tsx

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2023 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { createExtensionTester } from '@backstage/frontend-test-utils';
+import { screen } from '@testing-library/react';
+import { TechRadarPage, sampleTechRadarApi } from './alpha';
+
+describe('TechRadarPage', () => {
+  beforeAll(() => {
+    Object.defineProperty(window.SVGElement.prototype, 'getBBox', {
+      value: () => ({ width: 100, height: 100 }),
+      configurable: true,
+    });
+  });
+
+  it('renders without exploding', async () => {
+    createExtensionTester(TechRadarPage).add(sampleTechRadarApi).render();
+
+    await expect(screen.findByText('Tech Radar')).resolves.toBeInTheDocument();
+  });
+});

plugins/tech-radar/src/alpha.tsx

@@ -47,7 +47,7 @@ export const TechRadarPage = createPageExtension({
     import('./components').then(m => <m.RadarPage {...config} />),
 });
 
-const sampleTechRadarApi = createApiExtension({
+export const sampleTechRadarApi = createApiExtension({
   factory() {
     return createApiFactory(techRadarApiRef, new SampleTechRadarApi());
   },