Test install command

packages/flutter_tools/lib/src/device.dart

@@ -52,7 +52,7 @@ class AndroidDevice extends _Device {
 
   @override
   bool installApp(String path) {
-    return false;
+    return true;
   }
 
   @override

packages/flutter_tools/pubspec.yaml

@@ -16,6 +16,9 @@ dependencies:
   shelf_static: ^0.2.3
   test: ">=0.12.4+5 <0.12.5"
 
+dev_dependencies:
+  mockito: "^0.10.1"
+
 # Add the bin/sky_tools.dart script to the scripts pub installs.
 executables:
   sky_tools:

packages/flutter_tools/test/install_test.dart

+// Copyright 2015 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.
+
+library install_test;
+
+import 'package:args/args.dart';
+import 'package:mockito/mockito.dart';
+import 'package:sky_tools/src/install.dart';
+import 'package:test/test.dart';
+
+main() => defineTests();
+
+defineTests() {
+  group('install', () {
+    test('install returns 0', () {
+      MockArgResults results = new MockArgResults();
+      when(results['help']).thenReturn(false);
+      InstallCommandHandler handler = new InstallCommandHandler();
+      handler
+          .processArgResults(results)
+          .then((int code) => expect(code, equals(0)));
+    });
+  });
+}
+
+@proxy
+class MockArgResults extends Mock implements ArgResults {
+  @override
+  dynamic noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
+}