Handle and surface application test failures.

mojo/tools/mopy/gtest_list_tests.py

Index: mojo/tools/mopy/gtest_list_tests.py
diff --git a/mojo/tools/mopy/gtest_list_tests.py b/mojo/tools/mopy/gtest_list_tests.py
index 8b3369d20451ed5b41b728a770849e595564ff9b..0d5a66e9dce16f5f1ecc6eb60a2b0a816f02fff7 100644
--- a/mojo/tools/mopy/gtest_list_tests.py
+++ b/mojo/tools/mopy/gtest_list_tests.py
@@ -2,10 +2,17 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import re
+
+
 def gtest_list_tests(gtest_list_tests_output):
   """Returns a list of strings formatted as TestSuite.TestFixture from the
   output of running --gtest_list_tests on a GTEST application."""
 
+  if not re.match("^(\w*\.\r?\n(  \w*\r?\n)+)+", gtest_list_tests_output):
+    raise Exception("Unrecognized --gtest_list_tests output:\n%s" %
+                    gtest_list_tests_output)
+
   output_lines = gtest_list_tests_output.split('\n')
 
   test_list = []