added test cases to include both the endpoints

packages/integration/src/bitbucket/core.test.ts

@@ -111,6 +111,7 @@ describe('bitbucket core', () => {
 
   describe('getBitbucketDownloadUrl', () => {
     it('add path param if a path is specified for Bitbucket Server', async () => {
+   
       const defaultBranchResponse = {
         displayId: 'main',
       };
@@ -125,6 +126,7 @@ describe('bitbucket core', () => {
             ),
         ),
       );
+   
       const config: BitbucketIntegrationConfig = {
         host: 'bitbucket.mycompany.net',
         apiBaseUrl: 'https://api.bitbucket.mycompany.net/rest/api/1.0',
@@ -249,6 +251,42 @@ describe('bitbucket core', () => {
         config,
       );
       expect(defaultBranch).toEqual('main');
-    });
+      });
+
+      it('return default branch for Bitbucket Server for bitbucket version 5.11', async () => {
+        const defaultBranchResponse = {
+          displayId: 'main',
+        };
+        worker.use(
+          rest.get(
+            'https://api.bitbucket.mycompany.net/rest/api/1.0/projects/backstage/repos/mock/default-branch',
+            (_, res, ctx) =>
+              res(
+                ctx.status(404),
+                ctx.set('Content-Type', 'application/json'),
+                ctx.json(defaultBranchResponse),
+              ),
+          ),
+          rest.get(
+            'https://api.bitbucket.mycompany.net/rest/api/1.0/projects/backstage/repos/mock/branches/default',
+            (_, res, ctx) =>
+              res(
+                ctx.status(200),
+                ctx.set('Content-Type', 'application/json'),
+                ctx.json(defaultBranchResponse),
+              ),
+          ),
+        );
+        const config: BitbucketIntegrationConfig = {
+          host: 'bitbucket.mycompany.net',
+          apiBaseUrl: 'https://api.bitbucket.mycompany.net/rest/api/1.0',
+        };
+        const defaultBranch = await getBitbucketDefaultBranch(
+          'https://bitbucket.mycompany.net/projects/backstage/repos/mock/browse/README.md',
+          config,
+        );
+        expect(defaultBranch).toEqual('main');
+      });
+      
   });
 });