Skip commits that don't generate a patch + fixes to get export working

third_party/WebKit/Tools/Scripts/webkitpy/w3c/chromium_wpt_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 unittest
-from webkitpy.common.host_mock import MockHost
-from webkitpy.common.system.executive_mock import MockExecutive2
-from webkitpy.w3c.chromium_wpt import ChromiumWPT
-
-
-class ChromiumWPTTest(unittest.TestCase):
-
-    def test_exportable_commits_since(self):
-        host = MockHost()
-
-        def mock_command(args):
-            git_command = args[1]
-            if git_command == 'rev-list':
-                return 'badbeef8'
-            else:
-                return ''
-
-        host.executive = MockExecutive2(run_command_fn=mock_command)
-
-        chromium_wpt = ChromiumWPT(host)
-        commits = chromium_wpt.exportable_commits_since('3dadcafe')
-        self.assertEqual(len(commits), 1)
-
-    def test_ignores_commits_with_noexport_true(self):
-        host = MockHost()
-
-        return_vals = [
-            'Commit message\nNOEXPORT=true',  # show (message)
-            'deadbeefcafe',  # rev-list
-            'third_party/WebKit/LayoutTests/imported/wpt',  # rev-parse
-        ]
-        host.executive = MockExecutive2(run_command_fn=lambda _: return_vals.pop())
-
-        chromium_wpt = ChromiumWPT(host)
-        commits = chromium_wpt.exportable_commits_since('3dadcafe')
-        self.assertEqual(len(commits), 0)
-
-    def test_ignores_reverted_commits_with_noexport_true(self):
-        host = MockHost()
-
-        return_vals = [
-            'Commit message\n> NOEXPORT=true',  # show (message)
-            'deadbeefcafe',  # rev-list
-            'third_party/WebKit/LayoutTests/imported/wpt',  # rev-parse
-        ]
-        host.executive = MockExecutive2(run_command_fn=lambda _: return_vals.pop())
-
-        chromium_wpt = ChromiumWPT(host)
-        commits = chromium_wpt.exportable_commits_since('3dadcafe')
-        self.assertEqual(len(commits), 0)
-
-    def test_ignores_commits_that_start_with_import(self):
-        host = MockHost()
-
-        return_vals = [
-            'Import rutabaga@deadbeef',  # show (message)
-            'deadbeefcafe',  # rev-list
-            'third_party/WebKit/LayoutTests/imported/wpt',  # rev-parse
-        ]
-        host.executive = MockExecutive2(run_command_fn=lambda _: return_vals.pop())
-
-        chromium_wpt = ChromiumWPT(host)
-        commits = chromium_wpt.exportable_commits_since('3dadcafe')
-        self.assertEqual(len(commits), 0)