[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):

[klundberg, 2014/11/25 18:59:49]

I think it would be useful to have some unit tests for this to make sure that we
output what is expected. It doesn't have to be in this CL but maybe just add a
TODO to add unit tests? WDYT?

[jbudorick, 2014/11/25 23:32:18]

Sounds like a good idea to me. Tests added.

+  """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, per_iteration_data = zip(
+      *[(t.GetName(), generate_iteration_data(t))
+        for t in test_run_result.GetAll()])
+
+  return {
+    'global_tags': [],
+    'all_tests': all_tests,
+    # TODO(jbudorick): Add support for disabled tests within base_test_result.
+    'disabled_tests': [],
+    'per_iteration_data': per_iteration_data,
+  }
+
+
+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)))
+