[Android] Implement generic JSON results that match base/test/launcher.

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.
+  """
+  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:
+      return 'CRASH'
+    elif s == base_test_result.ResultType.TIMEOUT:
+      return 'TIMEOUT'
+    elif s == base_test_result.ResultType.UNKNOWN:
+      return 'UNKNOWN'
+
+  def generate_iteration_data(t):
+    return {
+      t.GetName(): [
+        {
+          'status': status_as_string(t.GetType()),
+          'elapsed_time_ms': t.GetDuration(),
+          'output_snippet': '',
+          'losless_snippet': '',
+          'output_snippet_base64:': '',
+        }
+      ]
+    }
+
+  all_tests_tuple, per_iteration_data_tuple = zip(
+      *[(t.GetName(), generate_iteration_data(t))
+        for t in test_run_result.GetAll()])
+
+  return {
+    'global_tags': [],
+    'all_tests': list(all_tests_tuple),
+    # TODO(jbudorick): Add support for disabled tests within base_test_result.
+    'disabled_tests': [],
+    'per_iteration_data': list(per_iteration_data_tuple),
+  }
+
+
+def GenerateJsonResultsFile(test_run_result, file_path):
+  """Write |test_run_result| to JSON.
+
+  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)))
+