Fixed tests and created test case for extractVersion flow

lib/workers/repository/update/pr/changelog/release-notes.spec.ts

@@ -621,6 +621,37 @@ describe('workers/repository/update/pr/changelog/release-notes', () => {
         body: 'some body\n',
       });
     });
+
+    it('fallback to extractVersion', async () => {
+      githubReleasesMock.mockResolvedValueOnce([
+        {
+          version: `app-1.0.0`,
+          url: 'correct/url/tag.com',
+          description: 'some body',
+        },
+      ] as never);
+      const res = await getReleaseNotes(
+        {
+          ...githubProject,
+          repository: 'some/other-repository',
+          depName: 'exampleDep',
+        },
+        {
+          version: '1.0.0',
+          gitRef: '1.0.0',
+        } as ChangeLogRelease,
+        { extractVersion: 'app-(?<version>[0-9.]*)' } as BranchUpgradeConfig
+      );
+      expect(res).toEqual({
+        url: 'correct/url/tag.com',
+        notesSourceUrl:
+          'https://api.github.com/repos/some/other-repository/releases',
+        id: undefined,
+        tag: 'app-1.0.0',
+        name: undefined,
+        body: 'some body\n',
+      });
+    });
   });
 
   describe('getReleaseNotesMd()', () => {

lib/workers/repository/update/pr/index.spec.ts

@@ -566,6 +566,7 @@ describe('workers/repository/update/pr/index', () => {
 
       const dummyRelease: ChangeLogRelease = {
         version: '',
+        gitRef: '',
         changes: dummyChanges,
         compare: {},
         date: '',