Reland of ll typ to v0.9.7.

third_party/typ/typ/runner.py

 # Copyright 2014 Google Inc. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #    http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 389 matching lines @@
                 add_tests(loader.discover(name, suffix, top_level_dir))
         else:
             possible_dir = name.replace('.', h.sep)
             if h.isdir(top_level_dir, possible_dir):
                 for suffix in suffixes:
                     path = h.join(top_level_dir, possible_dir)
                     suite = loader.discover(path, suffix, top_level_dir)
                     add_tests(suite)
             else:
                 add_tests(loader.loadTestsFromName(name))
+        if hasattr(loader, 'errors') and loader.errors:
+            # In Python3's version of unittest, loader failures get converted
+            # into failed test cases, rather than raising exceptions. However,
+            # the errors also get recorded so you can err out immediately.
+            raise ImportError(loader.errors)
 
     def _run_tests(self, result_set, test_set):
         h = self.host
         if not test_set.parallel_tests and not test_set.isolated_tests:
             self.print_('No tests to run.')
             return 1, None
 
         all_tests = [ti.name for ti in
                      _sort_inputs(test_set.parallel_tests +
                                   test_set.isolated_tests +
@@ skipping 518 matching lines @@
     return new_suite
 
 
 def _sort_inputs(inps):
     return sorted(inps, key=lambda inp: inp.name)
 
 
 if __name__ == '__main__':  # pragma: no cover
     sys.modules['__main__'].__file__ = path_to_file
     sys.exit(main(win_multiprocessing=WinMultiprocessing.importable))