Expose whether unittest failed to tearDown().

expect_tests/unittest_helper.py

 # Copyright 2014 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 expect_tests.type_definitions import (
   Test, Result, MultiTest, FuncCall, Bind)
 
 from expect_tests.util import covers
 
 
 def _SetUpClass(test_class):
   inst = test_class('__init__')
   inst.setUpClass()
   return inst
 
 
 def _TearDownClass(test_class_inst):
   test_class_inst.tearDownClass()
 
 
 def _RunTestCaseSingle(test_case, test_name, test_instance=None):
   # The hack is so that unittest.TestCase has something to pretend is the
   # test method without the BS of wrapping each method in a new TestCase
   # class...
   test_instance = test_instance or test_case('__init__')
   test_instance.setUp()
+  test_instance._test_failed_with_exception = False
   try:
     return Result(getattr(test_instance, test_name)())
+  except KeyboardInterrupt:
+    raise
+  except:
+    test_instance._test_failed_with_exception = True
+    raise
   finally:
     test_instance.tearDown()
 
 
 def UnittestTestCase(test_case):
   """Yield a MultiTest or multiple Test instances for the unittest.TestCase
   derived |test_case|.
 
   If the TestCase has a field `__expect_tests_serial__` defined to be True, then
   all test methods in the TestCase will be guaranteed to run in a single process
@@ skipping 58 matching lines @@
   contains zero or more unittest.TestCase implementations.
 
   @type test_module: types.ModuleType
   """
   for name in dir(test_module):
     obj = getattr(test_module, name)
     if _is_unittest(obj):
       for test in UnittestTestCase(obj)():
         yield test
     # TODO(iannucci): Make this compatible with the awful load_tests hack?