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diff --git a/tools/closure_linter-2.3.4/closure_linter/common/filetestcase.py b/tools/closure_linter-2.3.4/closure_linter/common/filetestcase.py
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+++ b/tools/closure_linter-2.3.4/closure_linter/common/filetestcase.py
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+#!/usr/bin/env python
+#
+# Copyright 2007 The Closure Linter Authors. 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,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Test case that runs a checker on a file, matching errors against annotations.
+
+Runs the given checker on the given file, accumulating all errors.  The list
+of errors is then matched against those annotated in the file.  Based heavily
+on devtools/javascript/gpylint/full_test.py.
+"""
+
+__author__ = ('robbyw@google.com (Robert Walker)',
+              'ajp@google.com (Andy Perelson)')
+
+import re
+
+import unittest as googletest
+from closure_linter.common import erroraccumulator
+
+
+class AnnotatedFileTestCase(googletest.TestCase):
+  """Test case to run a linter against a single file."""
+
+  # Matches an all caps letters + underscores error identifer
+  _MESSAGE = {'msg': '[A-Z][A-Z_]+'}
+  # Matches a //, followed by an optional line number with a +/-, followed by a
+  # list of message IDs. Used to extract expected messages from testdata files.
+  # TODO(robbyw): Generalize to use different commenting patterns.
+  _EXPECTED_RE = re.compile(r'\s*//\s*(?:(?P<line>[+-]?[0-9]+):)?'
+                            r'\s*(?P<msgs>%(msg)s(?:,\s*%(msg)s)*)' % _MESSAGE)
+
+  def __init__(self, filename, runner, converter):
+    """Create a single file lint test case.
+
+    Args:
+      filename: Filename to test.
+      runner: Object implementing the LintRunner interface that lints a file.
+      converter: Function taking an error string and returning an error code.
+    """
+
+    googletest.TestCase.__init__(self, 'runTest')
+    self._filename = filename
+    self._messages = []
+    self._runner = runner
+    self._converter = converter
+
+  def shortDescription(self):
+    """Provides a description for the test."""
+    return 'Run linter on %s' % self._filename
+
+  def runTest(self):
+    """Runs the test."""
+    try:
+      filename = self._filename
+      stream = open(filename)
+    except IOError, ex:
+      raise IOError('Could not find testdata resource for %s: %s' %
+                    (self._filename, ex))
+
+    expected = self._GetExpectedMessages(stream)
+    got = self._ProcessFileAndGetMessages(filename)
+    self.assertEqual(expected, got)
+
+  def _GetExpectedMessages(self, stream):
+    """Parse a file and get a sorted list of expected messages."""
+    messages = []
+    for i, line in enumerate(stream):
+      match = self._EXPECTED_RE.search(line)
+      if match:
+        line = match.group('line')
+        msg_ids = match.group('msgs')
+        if line is None:
+          line = i + 1
+        elif line.startswith('+') or line.startswith('-'):
+          line = i + 1 + int(line)
+        else:
+          line = int(line)
+        for msg_id in msg_ids.split(','):
+          # Ignore a spurious message from the license preamble.
+          if msg_id != 'WITHOUT':
+            messages.append((line, self._converter(msg_id.strip())))
+    stream.seek(0)
+    messages.sort()
+    return messages
+
+  def _ProcessFileAndGetMessages(self, filename):
+    """Trap gpylint's output parse it to get messages added."""
+    errors = erroraccumulator.ErrorAccumulator()
+    self._runner.Run([filename], errors)
+
+    errors = errors.GetErrors()
+    errors.sort()
+    return errors