Test for Gradle project generation.

BUG=webrtc:7608

Review-Url: https://codereview.webrtc.org/2858043006
Cr-Commit-Position: refs/heads/master@{#18063}

DEPS

@@ -114,6 +114,11 @@ deps_os = {
       Var('chromium_git') + '/external/robolectric.git' + '@' + '2a0b6ba221c14f3371813a676ce06143353e448d',
     'src/third_party/ub-uiautomator/lib':
       Var('chromium_git') + '/chromium/third_party/ub-uiautomator.git' + '@' + '00270549ce3161ae72ceb24712618ea28b4f9434',
+
+    # Gradle 3.5.0. Used for testing Android Studio project generation for WebRTC.
+    'src/webrtc/examples/androidtests/third_party/gradle':
+      Var('chromium_git') + '/external/github.com/gradle/gradle.git' + '@' +
+      'b762622a185d59ce0cfc9cbc6ab5dd22469e18a6',
   },
   'ios': {
     'src/ios':

webrtc/examples/androidtests/gradle_project_test.py

@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+# Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+"""
+This scripts tests creating an Android Studio project using the
+generate_gradle.py script and making a debug build using it.
+
+It expect to be given the webrtc output build directory as the first argument
+all other arguments are optional.
+"""
+
+import argparse
+import logging
+import os
+import shutil
+import subprocess
+import sys
+import tempfile
+
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+SRC_DIR = os.path.normpath(os.path.join(SCRIPT_DIR, os.pardir, os.pardir,
+                                        os.pardir))
+GENERATE_GRADLE_SCRIPT = os.path.join(SRC_DIR,
+                                      'build/android/gradle/generate_gradle.py')
+GRADLEW_BIN = os.path.join(SCRIPT_DIR, 'third_party/gradle/gradlew')
+
+
+def _RunCommand(argv, cwd=SRC_DIR, **kwargs):
+  logging.info('Running %r', argv)
+  subprocess.check_call(argv, cwd=cwd, **kwargs)
+
+
+def _ParseArgs():
+  parser = argparse.ArgumentParser(
+      description='Test generating Android gradle project.')
+  parser.add_argument('build_dir_android',
+      help='The path to the build directory for Android.')
+  parser.add_argument('--project_dir',
+      help='A temporary directory to put the output.')
+
+  args = parser.parse_args()
+  return args
+
+
+def main():
+  logging.basicConfig(level=logging.INFO)
+  args = _ParseArgs()
+
+  project_dir = args.project_dir
+  if not project_dir:
+    project_dir = tempfile.mkdtemp()
+
+  output_dir = os.path.abspath(args.build_dir_android)
+  project_dir = os.path.abspath(project_dir)
+
+  try:
+    _RunCommand([GENERATE_GRADLE_SCRIPT, '--output-directory', output_dir,
+        '--target', '//webrtc/examples:AppRTCMobile',
+        '--project-dir', project_dir,
+        '--use-gradle-process-resources', '--split-projects'])
+    _RunCommand([GRADLEW_BIN, 'assembleDebug'], project_dir)
+  finally:
+    shutil.rmtree(project_dir, True)
+
+
+if __name__ == '__main__':
+  sys.exit(main())

webrtc/examples/androidtests/third_party/.gitignore

@@ -0,0 +1,3 @@
+# This file is needed for projects that has this directory as a separate Git
+# mirror in DEPS. Without it, a lot is wiped and re-downloaded for each sync.
+/gradle

webrtc/examples/androidtests/third_party/README.webrtc

@@ -0,0 +1,10 @@
+The third_party directory contains sources from other projects.
+
+Code in third_party must document the license under which the source is being
+used. If the source itself does not include a license header or file, create
+an entry in this file that refers to reliable documentation of the project's
+license terms on the web (and add a note pointing here in the README file in
+that directory).
+
+<Include table of license information here, once it is available>
+