Adds a new unit tests for layout tests formatting script....

webkit/tools/layout_tests/test_output_formatter.py

 #!/usr/bin/env python
 # Copyright (c) 2006-2009 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.
 
 """
 This is a script for generating easily-viewable comparisons of text and pixel
 diffs.
 """
 import optparse
 
 from layout_package import test_expectations
 from layout_package import failure
 from layout_package import failure_finder
+from layout_package import failure_finder_test
 from layout_package import html_generator
 
 DEFAULT_BUILDER = "Webkit"
 
 def main(options, args):
 
+  if options.run_tests:
+    fft = failure_finder_test.FailureFinderTest()
+    return fft.runTests()
+
   # TODO(gwilson): Add a check that verifies the given platform exists.
 
   finder = failure_finder.FailureFinder(options.build_number,
                                         options.platform_builder,
                                         (not options.include_expected),
                                         options.test_regex,
                                         options.output_dir,
                                         int(options.max_failures),
                                         options.verbose)
   failure_list = finder.GetFailures()
@@ skipping 28 matching lines @@
                            help = "Use the given build number")
   option_parser.add_option("-t", "--test-regex",
                            default = None,
                            help = "Use the given regex to filter tests")
   option_parser.add_option("-o", "--output-dir",
                            default = ".",
                            help = "Output files to given directory")
   option_parser.add_option("-m", "--max-failures",
                            default = 100,
                            help = "Limit the maximum number of failures")
+  option_parser.add_option("-r", "--run-tests", action = "store_true",
+                           default = False,
+                           help = "Runs unit tests")
   options, args = option_parser.parse_args()
   main(options, args)