Refactor WPT Export to ensure only one PR in flight at a time

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):
-    pass
+
+    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)