[webkitscmpy] Fix setting title in mock Bitbucket server

https://bugs.webkit.org/show_bug.cgi?id=273884
rdar://127751416

Reviewed by Dewei Zhu.

* Tools/Scripts/libraries/webkitscmpy/webkitscmpy/mocks/remote/bitbucket.py:
(BitBucket.request): Allow underdefined 'fromRef' and 'toRef'.
* Tools/Scripts/libraries/webkitscmpy/webkitscmpy/test/pull_request_unittest.py:
(TestNetworkPullRequestGitHub.test_title):
(TestNetworkPullRequestBitBucket.test_title):

Canonical link: https://commits.webkit.org/278593@main

Tools/Scripts/libraries/webkitscmpy/webkitscmpy/mocks/remote/bitbucket.py

@@ -353,9 +353,11 @@ def request(self, method, url, data=None, params=None, json=None, **kwargs):
                 return mocks.Response.fromJson({})
             if method == 'PUT':
                 self.pull_requests[existing].update(json)
-                self.pull_requests[existing]['fromRef']['displayId'] = '/'.join(json['fromRef']['id'].split('/')[-2:])
                 self.pull_requests[existing]['fromRef']['latestCommit'] = json['fromRef']['latestCommit']
-                self.pull_requests[existing]['toRef']['displayId'] = '/'.join(json['toRef']['id'].split('/')[-2:])
+                if 'id' in json['fromRef']:
+                    self.pull_requests[existing]['fromRef']['displayId'] = '/'.join(json['fromRef']['id'].split('/')[-2:])
+                if 'id' in json['toRef']:
+                    self.pull_requests[existing]['toRef']['displayId'] = '/'.join(json['toRef']['id'].split('/')[-2:])
             if len(split_url) < 11:
                 return mocks.Response.fromJson({key: value for key, value in self.pull_requests[existing].items() if key not in ('commit', 'activities')})
 

Tools/Scripts/libraries/webkitscmpy/webkitscmpy/test/pull_request_unittest.py

@@ -2064,6 +2064,15 @@ def test_get(self):
             self.assertEqual(pr.base, 'main')
             self.assertEqual(pr.draft, False)
 
+    def test_title(self):
+        with self.webserver():
+            pr = remote.GitHub(self.remote).pull_requests.get(1)
+            self.assertEqual(pr.title, 'Example Change')
+            pr.generator.update(pr, title='New Title')
+
+            pr = remote.GitHub(self.remote).pull_requests.get(1)
+            self.assertEqual(pr.title, 'New Title')
+
     def test_reviewers(self):
         with self.webserver():
             pr = remote.GitHub(self.remote).pull_requests.get(1)
@@ -2360,6 +2369,15 @@ def test_get(self):
             self.assertEqual(pr.base, 'main')
             self.assertEqual(pr.draft, False)
 
+    def test_title(self):
+        with self.webserver():
+            pr = remote.BitBucket(self.remote).pull_requests.get(1)
+            self.assertEqual(pr.title, 'Example Change')
+            pr.generator.update(pr, title='New Title')
+
+            pr = remote.BitBucket(self.remote).pull_requests.get(1)
+            self.assertEqual(pr.title, 'New Title')
+
     def test_reviewers(self):
         with self.webserver():
             pr = remote.BitBucket(self.remote).pull_requests.get(1)