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

webkit/tools/layout_tests/test_output_formatter.py

Index: webkit/tools/layout_tests/test_output_formatter.py
===================================================================
--- webkit/tools/layout_tests/test_output_formatter.py	(revision 21078)
+++ webkit/tools/layout_tests/test_output_formatter.py	(working copy)
@@ -12,12 +12,17 @@
 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,
@@ -66,6 +71,9 @@
   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)