Updates the test runner script exit codes

build/android/pylib/exit_code.py

Index: build/android/pylib/exit_code.py
diff --git a/build/android/pylib/exit_code.py b/build/android/pylib/exit_code.py
new file mode 100644
index 0000000000000000000000000000000000000000..d6afcbc5d9b88baef52c64ad6484b44ac930f50f
--- /dev/null
+++ b/build/android/pylib/exit_code.py
@@ -0,0 +1,50 @@
+# Copyright (c) 2013 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.
+
+"""Effectively a singleton for maintaining exit code state of tests."""
+
+import constants
+
+_exit_code = constants.NORMAL_EXIT_CODE
+
+VALID_EXIT_CODES = [constants.ERROR_EXIT_CODE,
+                    constants.WARNING_EXIT_CODE,
+                    constants.NORMAL_EXIT_CODE]
+
+
+class InvalidExitCodeError(Exception):
+  """Invalid exit code observed."""
+
+
+def UpdateExitCode(new_exit_code):
+  """Updates the exit code with some checking and priority.
+
+  Args:
+    new_exit_code: The exit code to update to.
+
+  Raises:
+    InvalidExitCodeError: If |new_exit_code| is not in the set of
+        valid exit codes.
+  """
+
+  if new_exit_code not in VALID_EXIT_CODES:
+    raise InvalidExitCodeError('Observed exit code: %s' % new_exit_code)
+
+  # Only escalate exit codes
+  global _exit_code
+  if (_exit_code == constants.WARNING_EXIT_CODE and
+      new_exit_code == constants.ERROR_EXIT_CODE):
+    _exit_code = new_exit_code
+  elif _exit_code == constants.NORMAL_EXIT_CODE:
+    _exit_code = new_exit_code
+
+
+def ResetExitCode():
+  global _exit_code
+  _exit_code = constants.NORMAL_EXIT_CODE
+
+
+def GetExitCode():
+  global _exit_code
+  return _exit_code