Allow seeding the random layout test order and write out seed.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/views/printing_unittest.py

 # Copyright (C) 2010, 2012 Google Inc. All rights reserved.
 #
 # 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
@@ skipping 108 matching lines @@
     def test_configure_and_cleanup(self):
         # This test verifies that calling cleanup repeatedly and deleting
         # the object is safe.
         printer, _ = self.get_printer()
         printer.cleanup()
         printer.cleanup()
         printer = None
 
     def test_print_config(self):
         printer, err = self.get_printer()
-        # FIXME: it's lame that i have to set these options directly.
+        # FIXME: Make it so these options don't have to be set directly.
+        # pylint: disable=protected-access
         printer._options.pixel_tests = True
         printer._options.new_baseline = True
         printer._options.time_out_ms = 6000
         printer._options.slow_time_out_ms = 12000
+        printer._options.order = 'random'
+        printer._options.seed = 1234
         printer.print_config('/tmp')
         self.assertIn("Using port 'test-mac-mac10.10'", err.getvalue())
         self.assertIn('Test configuration: <mac10.10, x86, release>', err.getvalue())
         self.assertIn('View the test results at file:///tmp', err.getvalue())
         self.assertIn('View the archived results dashboard at file:///tmp', err.getvalue())
         self.assertIn('Baseline search path: test-mac-mac10.10 -> test-mac-mac10.11 -> generic', err.getvalue())
         self.assertIn('Using Release build', err.getvalue())
         self.assertIn('Pixel tests enabled', err.getvalue())
         self.assertIn('Command line:', err.getvalue())
         self.assertIn('Regular timeout: ', err.getvalue())
+        self.assertIn('Using random order with seed: 1234', err.getvalue())
 
         self.reset(err)
         printer._options.quiet = True
         printer.print_config('/tmp')
         self.assertNotIn('Baseline search path: test-mac-mac10.10 -> test-mac-mac10.11 -> generic', err.getvalue())
 
     def test_print_directory_timings(self):
         printer, err = self.get_printer()
         printer._options.debug_rwt_logging = True
 
@@ skipping 96 matching lines @@
         printer.print_finished_test(result, expected=True, exp_str='', got_str='')
 
         printer.print_started_test('passes/text.html')
         result = self.get_result('passes/text.html')
         printer.print_finished_test(result, expected=True, exp_str='', got_str='')
 
         # Only the first test's start should be printed.
         lines = err.buflist
         self.assertEqual(len(lines), 1)
         self.assertTrue(lines[0].endswith('passes/image.html\n'))