diff -r 000000000000 -r 4f2f89ce4247 WebKitTools/Scripts/webkitpy/style/patchreader_unittest.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKitTools/Scripts/webkitpy/style/patchreader_unittest.py	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,85 @@
+#!/usr/bin/python
+#
+# Copyright (C) 2010 Google Inc. All rights reserved.
+# Copyright (C) 2009 Torch Mobile Inc.
+# Copyright (C) 2009 Apple Inc. All rights reserved.
+# Copyright (C) 2010 Chris Jerdonek (chris.jerdonek@gmail.com)
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#    * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#    * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import unittest
+
+from webkitpy.style.patchreader import PatchReader
+
+
+class PatchReaderTest(unittest.TestCase):
+
+    """Test the PatchReader class."""
+
+    class MockTextFileReader(object):
+
+        def __init__(self):
+            self.passed_to_process_file = []
+            """A list of (file_path, line_numbers) pairs."""
+
+        def process_file(self, file_path, line_numbers):
+            self.passed_to_process_file.append((file_path, line_numbers))
+
+    def setUp(self):
+        file_reader = self.MockTextFileReader()
+        self._file_reader = file_reader
+        self._patch_checker = PatchReader(file_reader)
+
+    def _call_check_patch(self, patch_string):
+        self._patch_checker.check(patch_string)
+
+    def _assert_checked(self, passed_to_process_file):
+        self.assertEquals(self._file_reader.passed_to_process_file,
+                          passed_to_process_file)
+
+    def test_check_patch(self):
+        # The modified line_numbers array for this patch is: [2].
+        self._call_check_patch("""diff --git a/__init__.py b/__init__.py
+index ef65bee..e3db70e 100644
+--- a/__init__.py
++++ b/__init__.py
+@@ -1,1 +1,2 @@
+ # Required for Python to search this directory for module files
++# New line
+""")
+        self._assert_checked([("__init__.py", set([2]))])
+
+    def test_check_patch_with_deletion(self):
+        self._call_check_patch("""Index: __init__.py
+===================================================================
+--- __init__.py  (revision 3593)
++++ __init__.py  (working copy)
+@@ -1 +0,0 @@
+-foobar
+""")
+        # _mock_check_file should not be called for the deletion patch.
+        self._assert_checked([])