[Android] Add DeviceUtils.GetApplicationVersion

build/android/pylib/device/device_utils_test.py

Index: build/android/pylib/device/device_utils_test.py
diff --git a/build/android/pylib/device/device_utils_test.py b/build/android/pylib/device/device_utils_test.py
index 580794ddb8c3aca0416ea622c590ebb3c7b4e9a9..84e8205e117cfa35c1b45096110a8fe8edfee046 100755
--- a/build/android/pylib/device/device_utils_test.py
+++ b/build/android/pylib/device/device_utils_test.py
@@ -325,6 +325,36 @@ class DeviceUtils_GetApplicationPathsInternalTest(DeviceUtilsTest):
         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):