In rebaseline-cl: add option to only rebaseline tests changed in the CL.

third_party/WebKit/Tools/Scripts/webkitpy/common/net/rietveld_unittest.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import json
 import logging
 import unittest
 import urllib2
 
 from webkitpy.common.net.rietveld import filter_latest_jobs
 from webkitpy.common.net.rietveld import get_latest_try_job_results
 from webkitpy.common.net.rietveld import latest_try_jobs
+from webkitpy.common.net.rietveld import changed_files
 from webkitpy.common.net.buildbot import Build
 from webkitpy.common.net.web_mock import MockWeb
 from webkitpy.common.system.outputcapture import OutputCapture
 
 
 _log = logging.getLogger(__name__)
 
 
 class RietveldTest(unittest.TestCase):
 
@@ skipping 22 matching lines @@
                         'builder': 'foo-builder',
                         'buildnumber': 20,
                         'result': 1
                     },
                     {
                         'builder': 'bar-builder',
                         'buildnumber': 60,
                         'result': 0
                     },
                 ],
+                'files': {
+                    'some/path/foo.cc': {'status': 'M'},
+                    'some/path/bar.html': {'status': 'M'},
+                }
             }),
             'https://codereview.chromium.org/api/11113333': 'my non-JSON contents',
         })
 
     def test_latest_try_jobs(self):
         self.assertEqual(
             latest_try_jobs(11112222, ('bar-builder', 'other-builder'), self.web),
             [Build('bar-builder', 60)])
 
     def test_latest_try_jobs_http_error(self):
@@ skipping 38 matching lines @@
 
     def test_filter_latest_jobs_higher_build_last(self):
         self.assertEqual(
             filter_latest_jobs([Build('foo', 3), Build('bar', 5), Build('foo', 5)]),
             [Build('bar', 5), Build('foo', 5)])
 
     def test_filter_latest_jobs_no_build_number(self):
         self.assertEqual(
             filter_latest_jobs([Build('foo', 3), Build('bar')]),
             [Build('foo', 3)])
+
+    def test_changed_files(self):
+        self.assertEqual(
+            changed_files(11112222, self.web),
+            ['some/path/bar.html', 'some/path/foo.cc'])
+
+    def test_changed_files_no_results(self):
+        self.assertIsNone(changed_files(11113333, self.web))