Add get_issue_number function to webkitpy/common/checkout/scm/git.py

third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/scm_unittest.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/scm_unittest.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/scm_unittest.py b/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/scm_unittest.py
index 9f662cd972aec28f038a8deff8c16dac7754ba27..776320286c5679e76055fe273ac499a70c0ab782 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/scm_unittest.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/scm_unittest.py
@@ -31,7 +31,7 @@
 import unittest
 
 from webkitpy.common.system.executive import Executive, ScriptError
-from webkitpy.common.system.executive_mock import MockExecutive
+from webkitpy.common.system.executive_mock import MockExecutive, MockExecutive2
 from webkitpy.common.system.filesystem import FileSystem
 from webkitpy.common.system.filesystem_mock import MockFileSystem
 from webkitpy.common.checkout.scm.detection import detect_scm_system
@@ -254,3 +254,11 @@ class GitTestWithMock(SCMTestBase):
 
         scm._run_git = lambda args: 'Date: 2013-02-08 01:55:21 -0800'
         self.assertEqual(scm.timestamp_of_revision('some-path', '12345'), '2013-02-08T09:55:21Z')
+
+    def test_get_issue_number(self):
+        scm = Git(cwd='.', executive=MockExecutive2(output='Issue number: 12345 (http://crrev.com/12345)'))
+        issue_number = scm.get_issue_number()
+        self.assertEqual(issue_number, '12345')
+        scm2 = Git(cwd='.', executive=MockExecutive2(output='Issue number: None (None)'))
+        issue_number = scm2.get_issue_number()
+        self.assertEqual(issue_number, 'None')