Add a snapshot of flutter/engine/src/build to our sdk

build/android/pylib/linker/test_runner.py

Index: build/android/pylib/linker/test_runner.py
diff --git a/build/android/pylib/linker/test_runner.py b/build/android/pylib/linker/test_runner.py
new file mode 100644
index 0000000000000000000000000000000000000000..b6803e45d9dd4a9b7ef2a10ee733437e03e257fa
--- /dev/null
+++ b/build/android/pylib/linker/test_runner.py
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+# Copyright 2013 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.
+
+"""Runs linker tests on a particular device."""
+
+import logging
+import os.path
+import sys
+import traceback
+
+from pylib import constants
+from pylib.base import base_test_result
+from pylib.base import base_test_runner
+from pylib.linker import test_case
+from pylib.utils import apk_helper
+
+
+# Name of the Android package to install for this to work.
+_PACKAGE_NAME = 'ChromiumLinkerTest'
+
+
+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 LinkerTestRunner(base_test_runner.BaseTestRunner):
+  """Orchestrates running a set of linker tests.
+
+  Any Python exceptions in the tests are caught and translated into a failed
+  result, rather than being re-raised on the main thread.
+  """
+
+  #override
+  def __init__(self, device, tool):
+    """Creates a new LinkerTestRunner.
+
+    Args:
+      device: Attached android device.
+      tool: Name of the Valgrind tool.
+    """
+    super(LinkerTestRunner, self).__init__(device, tool)
+
+  #override
+  def InstallTestPackage(self):
+    apk_path = os.path.join(
+        constants.GetOutDirectory(), 'apks', '%s.apk' % _PACKAGE_NAME)
+
+    if not os.path.exists(apk_path):
+      raise Exception('%s not found, please build it' % apk_path)
+
+    self.device.Install(apk_path)
+
+  #override
+  def RunTest(self, test):
+    """Sets up and runs a test case.
+
+    Args:
+      test: An object which is ostensibly a subclass of LinkerTestCaseBase.
+
+    Returns:
+      A TestRunResults object which contains the result produced by the test
+      and, in the case of a failure, the test that should be retried.
+    """
+
+    assert isinstance(test, test_case.LinkerTestCaseBase)
+
+    try:
+      results = test.Run(self.device)
+    except Exception:
+      logging.exception('Caught exception while trying to run test: ' +
+                        test.tagged_name)
+      exc_info = sys.exc_info()
+      results = base_test_result.TestRunResults()
+      results.AddResult(LinkerExceptionTestResult(
+          test.tagged_name, exc_info))
+
+    if not results.DidRunPass():
+      return results, test
+    else:
+      return results, None