Add json output to Junit tests.

build/android/pylib/junit/test_runner.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 json
 import os
+import tempfile
 
 from pylib import cmd_helper
 from pylib import constants
+from pylib.base import base_test_result
+from pylib.results import json_results
 
 class JavaTestRunner(object):
   """Runs java tests on the host."""
 
   def __init__(self, args):
     self._package_filter = args.package_filter
     self._runner_filter = args.runner_filter
     self._sdk_version = args.sdk_version
     self._test_filter = args.test_filter
     self._test_suite = args.test_suite
 
   def SetUp(self):
     pass
 
   def RunTest(self, _test):
     """Runs junit tests from |self._test_suite|."""
-    command = ['java',
-               '-jar', os.path.join(constants.GetOutDirectory(), 'lib.java',
-                                    '%s.jar' % self._test_suite)]
-    if self._test_filter:
-      command.extend(['-gtest-filter', self._test_filter])
-    if self._package_filter:
-      command.extend(['-package-filter', self._package_filter])
-    if self._runner_filter:
-      command.extend(['-runner-filter', self._runner_filter])
-    if self._sdk_version:
-      command.extend(['-sdk-version', self._sdk_version])
-    return cmd_helper.RunCmd(command)
+    with tempfile.NamedTemporaryFile() as json_file:
+      command = ['java',
+                 '-jar', os.path.join(constants.GetOutDirectory(), 'lib.java',
+                 '%s.jar' % self._test_suite), '-json-results-file',

[jbudorick, 2015/03/12 19:41:49]

nit: drop this onto its own line w/ json_file.name

[mikecase (-- gone --), 2015/03/13 01:07:23]

Done.

+                 json_file.name]
+      if self._test_filter:
+        command.extend(['-gtest-filter', self._test_filter])
+      if self._package_filter:
+        command.extend(['-package-filter', self._package_filter])
+      if self._runner_filter:
+        command.extend(['-runner-filter', self._runner_filter])
+      if self._sdk_version:
+        command.extend(['-sdk-version', self._sdk_version])
+      return_code = cmd_helper.RunCmd(command)
+      results_list = json_results.ParseResultsFromJson(
+          json.loads(json_file.read()))
+      return (results_list, return_code)
 
   def TearDown(self):
     pass