Add json output to Junit tests.

build/android/pylib/results/json_results.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 logging
 
 from pylib.base import base_test_result
 
 
 def GenerateResultsDict(test_run_result):
   """Create a results dict from |test_run_result| suitable for writing to JSON.
   Args:
     test_run_result: a base_test_result.TestRunResults object.
   Returns:
     A results dict that mirrors the one generated by
       base/test/launcher/test_results_tracker.cc:SaveSummaryAsJSON.
   """
+  # Example json output.
+  # {
+  #   "global_tags": [],
+  #   "all_tests": [
+  #     "test1",
+  #     "test2",
+  #    ],
+  #   "disabled_tests": [],
+  #   "per_iteration_data": [
+  #     {
+  #       "test1": [
+  #         {
+  #           "status": "SUCCESS",
+  #           "elapsed_time_ms": 1,
+  #           "output_snippet": "",
+  #           "output_snippet_base64": "",
+  #           "losless_snippet": "",
+  #         },
+  #       ],
+  #       "test2": [
+  #         {
+  #           "status": "FAILURE",
+  #           "elapsed_time_ms": 12,
+  #           "output_snippet": "",
+  #           "output_snippet_base64": "",
+  #           "losless_snippet": "",
+  #         },
+  #       ],
+  #     },
+  #   ],
+  # }
+
   assert isinstance(test_run_result, base_test_result.TestRunResults)
 
   def status_as_string(s):
     if s == base_test_result.ResultType.PASS:
       return 'SUCCESS'
     elif s == base_test_result.ResultType.SKIP:
       return 'SKIPPED'
     elif s == base_test_result.ResultType.FAIL:
       return 'FAILURE'
     elif s == base_test_result.ResultType.CRASH:
@@ skipping 35 matching lines @@
   This emulates the format of the JSON emitted by
   base/test/launcher/test_results_tracker.cc:SaveSummaryAsJSON.
 
   Args:
     test_run_result: a base_test_result.TestRunResults object.
     file_path: The path to the JSON file to write.
   """
   with open(file_path, 'w') as json_result_file:
     json_result_file.write(json.dumps(GenerateResultsDict(test_run_result)))
 
+
+def ParseResultsFromJson(json_results):
+  """Creates a list of BaseTestResult objects from JSON.
+
+  Args:
+    json_results: A JSON dict in the format created by
+                  GenerateJsonResultsFile.
+  """
+
+  def string_as_status(s):
+    if s == 'SUCCESS':
+      return base_test_result.ResultType.PASS
+    elif s == 'SKIPPED':
+      return base_test_result.ResultType.SKIP
+    elif s == 'FAILURE':
+      return base_test_result.ResultType.FAIL
+    elif s == 'CRASH':
+      return base_test_result.ResultType.CRASH
+    elif s == 'TIMEOUT':
+      return base_test_result.ResultType.TIMEOUT
+    else:
+      return base_test_result.ResultType.UNKNOWN
+
+  results_list = []
+  testsuite_runs = json_results['per_iteration_data']
+  for testsuite_run in testsuite_runs:
+    for test, test_runs in testsuite_run.iteritems():
+      results_list.extend(
+          [base_test_result.BaseTestResult(test,
+                                           string_as_status(tr['status']),
+                                           duration=tr['elapsed_time_ms'])
+          for tr in test_runs])
+  return results_list
+