[Android] Add DeviceUtils.GetApplicationVersion

build/android/pylib/device/device_utils_test.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 """
 Unit tests for the contents of device_utils.py (mostly DeviceUtils).
 """
 
 # pylint: disable=C0321
@@ skipping 307 matching lines @@
 
   def test_GetApplicationPathsInternal_fails(self):
     with self.assertCalls(
         (self.call.adb.Shell('getprop ro.build.version.sdk'), '19\n'),
         (self.call.adb.Shell('pm path android'),
          self.CommandError('ERROR. Is package manager running?\n'))):
       with self.assertRaises(device_errors.CommandFailedError):
         self.device._GetApplicationPathsInternal('android')
 
 
+class DeviceUtils_GetApplicationVersionTest(DeviceUtilsTest):
+
+  def test_GetApplicationVersion_exists(self):
+    with self.assertCalls(
+        (self.call.adb.Shell('dumpsys package com.android.chrome'),
+         'Packages:\n'
+         '  Package [com.android.chrome] (3901ecfb):\n'
+         '    userId=1234 gids=[123, 456, 789]\n'
+         '    pkg=Package{1fecf634 com.android.chrome}\n'
+         '    versionName=45.0.1234.7\n')):
+      self.assertEquals('45.0.1234.7',
+                        self.device.GetApplicationVersion('com.android.chrome'))
+
+  def test_GetApplicationVersion_notExists(self):
+    with self.assertCalls(
+        (self.call.adb.Shell('dumpsys package com.android.chrome'), '')):
+      self.assertEquals(None,
+                        self.device.GetApplicationVersion('com.android.chrome'))
+
+  def test_GetApplicationVersion_fails(self):
+    with self.assertCalls(
+        (self.call.adb.Shell('dumpsys package com.android.chrome'),
+         'Packages:\n'
+         '  Package [com.android.chrome] (3901ecfb):\n'
+         '    userId=1234 gids=[123, 456, 789]\n'
+         '    pkg=Package{1fecf634 com.android.chrome}\n')):
+      with self.assertRaises(device_errors.CommandFailedError):
+        self.device.GetApplicationVersion('com.android.chrome')
+
+
 class DeviceUtilsGetApplicationDataDirectoryTest(DeviceUtilsTest):
 
   def testGetApplicationDataDirectory_exists(self):
     with self.assertCall(
         self.call.device._RunPipedShellCommand(
             'pm dump foo.bar.baz | grep dataDir='),
         ['dataDir=/data/data/foo.bar.baz']):
       self.assertEquals(
           '/data/data/foo.bar.baz',
           self.device.GetApplicationDataDirectory('foo.bar.baz'))
@@ skipping 1591 matching lines @@
         self.call.device.WriteFile(mock.ANY, mock.ANY),
         (self.call.device.RunShellCommand(
             ['source', mock_temp_file ], as_root=True)),
         self.call.adb.WaitForDevice()):
       self.device.RestartAdbd()
 
 
 if __name__ == '__main__':
   logging.getLogger().setLevel(logging.DEBUG)
   unittest.main(verbosity=2)