Insert logcat as part of test result for android instrumentation tests.

build/android/pylib/local/device/local_device_instrumentation_test_run.py

 # Copyright 2015 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 logging
 import os
 import posixpath
 import re
 import time
 
 from devil.android import device_errors
 from devil.android import flag_changer
 from devil.utils import reraiser_thread
 from pylib import valgrind_tools
+from pylib.android import logdog_logcat_monitor
 from pylib.base import base_test_result
 from pylib.instrumentation import instrumentation_test_instance
 from pylib.local.device import local_device_environment
 from pylib.local.device import local_device_test_run
 import tombstones
 
-
 _TAG = 'test_runner_py'
 
 TIMEOUT_ANNOTATIONS = [
   ('Manual', 10 * 60 * 60),
   ('IntegrationTest', 30 * 60),
   ('External', 10 * 60),
   ('EnormousTest', 10 * 60),
   ('LargeTest', 5 * 60),
   ('MediumTest', 3 * 60),
   ('SmallTest', 1 * 60),
@@ skipping 206 matching lines @@
 
     if flags:
       self._CreateFlagChangerIfNeeded(device)
       self._flag_changers[str(device)].PushFlags(
         add=flags.add, remove=flags.remove)
 
     try:
       device.RunShellCommand(
           ['log', '-p', 'i', '-t', _TAG, 'START %s' % test_name],
           check_return=True)
+      logcat_url = None
       time_ms = lambda: int(time.time() * 1e3)
       start_ms = time_ms()
-      output = device.StartInstrumentation(
-          target, raw=True, extras=extras, timeout=timeout, retries=0)
+      if self._test_instance.should_save_logcat:
+        with logdog_logcat_monitor.LogdogLogcatMonitor(
+            device.adb,
+            'logcat_%s' % test_name.replace('#', '.')) as logmon:
+          output = device.StartInstrumentation(
+              target, raw=True, extras=extras, timeout=timeout, retries=0)
+          logcat_url = logmon.GetLogcatURL()

[jbudorick, 2016/11/29 00:50:59]

You need to do this outside the scope of the with block. Inside it, we haven't
called __exit__ or Stop and thus haven't set the logcat url yet.

[BigBossZhiling, 2016/11/29 01:38:27]

Done.

+      else:
+        output = device.StartInstrumentation(
+            target, raw=True, extras=extras, timeout=timeout, retries=0)
     finally:
       device.RunShellCommand(
           ['log', '-p', 'i', '-t', _TAG, 'END %s' % test_name],
           check_return=True)
       duration_ms = time_ms() - start_ms
       if flags:
         self._flag_changers[str(device)].Restore()
       if test_timeout_scale:
         valgrind_tools.SetChromeTimeoutScale(
             device, self._test_instance.timeout_scale)
 
     # TODO(jbudorick): Make instrumentation tests output a JSON so this
     # doesn't have to parse the output.
     result_code, result_bundle, statuses = (
         self._test_instance.ParseAmInstrumentRawOutput(output))
     results = self._test_instance.GenerateTestResults(
         result_code, result_bundle, statuses, start_ms, duration_ms)
+    for result in results:
+      result.SetLogcatUrl(logcat_url)
 
     # Update the result name if the test used flags.
     if flags:
       for r in results:
         if r.GetName() == test_name:
           r.SetName(test_display_name)
 
     # Add UNKNOWN results for any missing tests.
     iterable_test = test if isinstance(test, list) else [test]
     test_names = set(self._GetUniqueTestName(t) for t in iterable_test)
@@ skipping 87 matching lines @@
         timeout = v
         break
     else:
       logging.warning('Using default 1 minute timeout for %s', test_name)
       timeout = 60
 
     timeout *= cls._GetTimeoutScaleFromAnnotations(annotations)
 
     return timeout