Add a unit test for run_test_cases.py.

tools/isolate/data/gtest_fake/gtest_fake.py

+#!/usr/bin/env python
+# Copyright (c) 2012 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.
+
+"""Simulate a google-test executable.
+
+http://code.google.com/p/googletest/
+"""
+
+import optparse
+import sys
+
+
+TESTS = {
+  'Foo': ['Bar1', 'Bar2', 'Bar3'],
+  'Baz': ['Fail'],
+}
+TOTAL = sum(len(v) for v in TESTS.itervalues())
+
+
+def get_test_output(test_name):
+  fixture, case = test_name.split('.', 1)
+  return (
+    '[==========] Running 1 test from 1 test case.\n'
+    '[----------] Global test environment set-up.\n'
+    '[----------] 1 test from %(fixture)s\n'
+    '[ RUN      ] %(fixture)s.%(case)s\n'
+    '[       OK ] %(fixture)s.%(case)s (0 ms)\n'
+    '[----------] 1 test from %(fixture)s (0 ms total)\n'
+    '\n') % {
+      'fixture': fixture,
+      'case': case,
+    }
+
+
+def get_footer(number):
+  return (
+    '[----------] Global test environment tear-down\n'
+    '[==========] %(number)d test from %(total)d test case ran. (0 ms total)\n'
+    '[  PASSED  ] %(number)d test.\n'
+    '\n'
+    '  YOU HAVE 5 DISABLED TESTS\n'
+    '\n'
+    '  YOU HAVE 2 tests with ignored failures (FAILS prefix)\n') % {
+      'number': number,
+      'total': TOTAL,
+    }
+
+
+def main():
+  parser = optparse.OptionParser()
+  parser.add_option('--gtest_list_tests', action='store_true')
+  parser.add_option('--gtest_filter')
+  options, args = parser.parse_args()
+  if args:
+    parser.error('Failed to process args %s' % args)
+
+  if options.gtest_list_tests:
+    for fixture, cases in TESTS.iteritems():
+      print '%s.' % fixture
+      for case in cases:
+        print '  ' + case
+    print '  YOU HAVE 2 tests with ignored failures (FAILS prefix)'
+    print ''
+    return 0
+
+  if options.gtest_filter:
+    # Simulate running one test.
+    print 'Note: Google Test filter = %s\n' % options.gtest_filter
+    print get_test_output(options.gtest_filter)
+    print get_footer(1)
+    # Make Baz.Fail fail.
+    return options.gtest_filter == 'Baz.Fail'
+
+  for fixture, cases in TESTS.iteritems():
+    for case in cases:
+      print get_test_output('%s.%s' % (fixture, case))
+  print get_footer(TOTAL)
+  return 1
+
+
+if __name__ == '__main__':
+  sys.exit(main())