[android] Convert linker tests to platform mode.

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

+# Copyright 2016 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 sys
+import traceback
+
+from pylib.base import base_test_result
+from pylib.linker import test_case
+from pylib.local.device import local_device_environment
+from pylib.local.device import local_device_test_run
+
+
+class LinkerExceptionTestResult(base_test_result.BaseTestResult):
+  """Test result corresponding to a python exception in a host-custom test."""
+
+  def __init__(self, test_name, exc_info):
+    """Constructs a LinkerExceptionTestResult object.
+
+    Args:
+      test_name: name of the test which raised an exception.
+      exc_info: exception info, ostensibly from sys.exc_info().
+    """
+    exc_type, exc_value, exc_traceback = exc_info
+    trace_info = ''.join(traceback.format_exception(exc_type, exc_value,
+                                                    exc_traceback))
+    log_msg = 'Exception:\n' + trace_info
+
+    super(LinkerExceptionTestResult, self).__init__(
+        test_name,
+        base_test_result.ResultType.FAIL,
+        log="%s %s" % (exc_type, log_msg))
+
+
+class LocalDeviceLinkerTestRun(local_device_test_run.LocalDeviceTestRun):
+
+  def _CreateShards(self, tests):
+    return tests
+
+  def _GetTests(self):
+    min_device_sdk = min(d.build_version_sdk for d in self._env.devices)
+    return self._test_instance.GetTests(min_device_sdk)
+
+  def _GetUniqueTestName(self, test):
+    return test.qualified_name
+
+  def _RunTest(self, device, test):
+    assert isinstance(test, test_case.LinkerTestCaseBase)
+
+    try:
+      result = test.Run(device)
+    except Exception: # pylint: disable=broad-except
+      logging.exception('Caught exception while trying to run test: ' +
+                        test.tagged_name)
+      exc_info = sys.exc_info()
+      result = LinkerExceptionTestResult(test.tagged_name, exc_info)
+
+    return result, None
+
+  def SetUp(self):
+    @local_device_environment.handle_shard_failures_with(
+        on_failure=self._env.BlacklistDevice)
+    def individual_device_set_up(dev):
+      dev.Install(self._test_instance.test_apk)
+
+    self._env.parallel_devices.pMap(individual_device_set_up)
+
+  def _ShouldShard(self):
+    return True
+
+  def TearDown(self):
+    pass
+
+  def TestPackage(self):
+    pass