fix: mock github checks in tests

src/jest.setup.ts

@@ -1,5 +1,24 @@
 import failOnConsole from 'jest-fail-on-console';
 
+// Polyfill fetch for the Node.js test environment.
+// Jest runs tests inside a VM context where the global `fetch` is not
+// automatically provided, even on Node 18+. Octokit requires a `fetch`
+// implementation, so we provide one using undici's implementation.
+// This ensures tests that interact with Octokit do not throw when
+// constructing the client.
+import { fetch, Headers, Request, Response } from 'undici';
+
+if (!global.fetch) {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  (global as any).fetch = fetch;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  (global as any).Headers = Headers;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  (global as any).Request = Request;
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  (global as any).Response = Response;
+}
+
 // Fail when console logs something inside a test - use spyOn instead
 failOnConsole({
   shouldFailOnWarn: true,

src/model/cloud-runner/tests/cloud-runner-github-checks.test.ts

@@ -17,6 +17,25 @@ describe('Cloud Runner Github Checks', () => {
   it('Responds', () => {});
 
   if (CloudRunnerOptions.cloudRunnerDebug) {
+    beforeEach(() => {
+      // Mock GitHub API requests to avoid real network calls
+      jest.spyOn(GitHub as any, 'createGitHubCheckRequest').mockResolvedValue({
+        status: 201,
+        data: { id: '1' },
+      });
+      jest.spyOn(GitHub as any, 'updateGitHubCheckRequest').mockResolvedValue({
+        status: 200,
+        data: {},
+      });
+      jest
+        .spyOn(GitHub as any, 'runUpdateAsyncChecksWorkflow')
+        .mockResolvedValue(undefined);
+    });
+
+    afterEach(() => {
+      jest.restoreAllMocks();
+    });
+
     it(
       'Check Handling Direct',
       async () => {