chore(catalog): using msw instead of jest-fetch-mock

plugins/catalog/package.json

@@ -50,11 +50,9 @@
     "@testing-library/user-event": "^12.0.7",
     "@types/jest": "^26.0.7",
     "@types/node": "^12.0.0",
-    "jest-fetch-mock": "^3.0.3",
     "msw": "^0.20.5",
     "node-fetch": "^2.6.1",
-    "react-test-renderer": "^16.13.1",
-    "whatwg-fetch": "^3.4.0"
+    "react-test-renderer": "^16.13.1"
   },
   "files": [
     "dist"

plugins/catalog/src/api/CatalogClient.test.ts

@@ -19,18 +19,17 @@ import { setupServer } from 'msw/node';
 import { CatalogClient } from './CatalogClient';
 import { Entity } from '@backstage/catalog-model';
 import { UrlPatternDiscovery } from '@backstage/core';
+import { msw } from '@backstage/test-utils';
 
 const server = setupServer();
 const mockBaseUrl = 'http://backstage:9191/i-am-a-mock-base';
 const discoveryApi = UrlPatternDiscovery.compile(mockBaseUrl);
 
 describe('CatalogClient', () => {
-  beforeAll(() => server.listen({ onUnhandledRequest: 'error' }));
-  afterEach(() => server.resetHandlers());
-  afterAll(() => server.close());
-
   let client = new CatalogClient({ discoveryApi });
 
+  msw.setupDefaultHandlers(server);
+
   beforeEach(() => {
     client = new CatalogClient({ discoveryApi });
   });

plugins/catalog/src/setupTests.ts

@@ -14,5 +14,7 @@
  * limitations under the License.
  */
 
+import fetch from 'node-fetch';
 import '@testing-library/jest-dom';
-import 'whatwg-fetch';
+
+global.fetch = fetch as any;