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

build/android/pylib/host_driven/test_server.py

Index: build/android/pylib/host_driven/test_server.py
diff --git a/build/android/pylib/host_driven/test_server.py b/build/android/pylib/host_driven/test_server.py
new file mode 100644
index 0000000000000000000000000000000000000000..07835000fd95e940a65ce79bb538de8aecf69b55
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+++ b/build/android/pylib/host_driven/test_server.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.
+
+"""Host driven test server controller.
+
+This class controls the startup and shutdown of a python driven test server that
+runs in a separate process.
+
+The server starts up automatically when the object is created.
+
+After it starts up, it is possible to retreive the hostname it started on
+through accessing the member field |host| and the port name through |port|.
+
+For shutting down the server, call TearDown().
+"""
+
+import logging
+import subprocess
+import os
+import os.path
+import time
+import urllib2
+
+from pylib import constants
+
+# NOTE: when adding or modifying these lines, omit any leading slashes!
+# Otherwise os.path.join() will (correctly) treat them as absolute paths
+# instead of relative paths, and will do nothing.
+_PYTHONPATH_DIRS = [
+    'net/tools/testserver/',
+    'third_party/',
+    'third_party/pyftpdlib/src/',
+    'third_party/pywebsocket/src',
+    'third_party/tlslite/',
+]
+
+# Python files in these directories are generated as part of the build.
+# These dirs are located in out/(Debug|Release) directory.
+# The correct path is determined based on the build type. E.g. out/Debug for
+# debug builds and out/Release for release builds.
+_GENERATED_PYTHONPATH_DIRS = [
+    'pyproto/policy/proto/',
+    'pyproto/sync/protocol/',
+    'pyproto/'
+]
+
+_TEST_SERVER_HOST = '127.0.0.1'
+# Paths for supported test server executables.
+TEST_NET_SERVER_PATH = 'net/tools/testserver/testserver.py'
+TEST_SYNC_SERVER_PATH = 'sync/tools/testserver/sync_testserver.py'
+TEST_POLICY_SERVER_PATH = 'chrome/browser/policy/test/policy_testserver.py'
+# Parameters to check that the server is up and running.
+TEST_SERVER_CHECK_PARAMS = {
+  TEST_NET_SERVER_PATH: {
+      'url_path': '/',
+      'response': 'Default response given for path'
+  },
+  TEST_SYNC_SERVER_PATH: {
+      'url_path': 'chromiumsync/time',
+      'response': '0123456789'
+  },
+  TEST_POLICY_SERVER_PATH: {
+      'url_path': 'test/ping',
+      'response': 'Policy server is up.'
+  },
+}
+
+class TestServer(object):
+  """Sets up a host driven test server on the host machine.
+
+  For shutting down the server, call TearDown().
+  """
+
+  def __init__(self, shard_index, test_server_port, test_server_path,
+               test_server_flags=None):
+    """Sets up a Python driven test server on the host machine.
+
+    Args:
+      shard_index: Index of the current shard.
+      test_server_port: Port to run the test server on. This is multiplexed with
+                        the shard index. To retrieve the real port access the
+                        member variable |port|.
+      test_server_path: The path (relative to the root src dir) of the server
+      test_server_flags: Optional list of additional flags to the test server
+    """
+    self.host = _TEST_SERVER_HOST
+    self.port = test_server_port + shard_index
+
+    src_dir = constants.DIR_SOURCE_ROOT
+    # Make dirs into a list of absolute paths.
+    abs_dirs = [os.path.join(src_dir, d) for d in _PYTHONPATH_DIRS]
+    # Add the generated python files to the path
+    abs_dirs.extend([os.path.join(src_dir, constants.GetOutDirectory(), d)
+                     for d in _GENERATED_PYTHONPATH_DIRS])
+    current_python_path = os.environ.get('PYTHONPATH')
+    extra_python_path = ':'.join(abs_dirs)
+    if current_python_path:
+      python_path = current_python_path + ':' + extra_python_path
+    else:
+      python_path = extra_python_path
+
+    # NOTE: A separate python process is used to simplify getting the right
+    # system path for finding includes.
+    test_server_flags = test_server_flags or []
+    cmd = ['python', os.path.join(src_dir, test_server_path),
+           '--log-to-console',
+           ('--host=%s' % self.host),
+           ('--port=%d' % self.port),
+           '--on-remote-server'] + test_server_flags
+    self._test_server_process = subprocess.Popen(
+          cmd, env={'PYTHONPATH': python_path})
+    test_url = 'http://%s:%d/%s' % (self.host, self.port,
+        TEST_SERVER_CHECK_PARAMS[test_server_path]['url_path'])
+    expected_response = TEST_SERVER_CHECK_PARAMS[test_server_path]['response']
+    retries = 0
+    while retries < 5:
+      try:
+        d = urllib2.urlopen(test_url).read()
+        logging.info('URL %s GOT: %s' % (test_url, d))
+        if d.startswith(expected_response):
+          break
+      except Exception as e:
+        logging.info('URL %s GOT: %s' % (test_url, e))
+      time.sleep(retries * 0.1)
+      retries += 1
+
+  def TearDown(self):
+    self._test_server_process.kill()
+    self._test_server_process.wait()