mash: Add a launch-test for ash_sysui.

mash/wm/app_launch_unittest.cc

 // Copyright 2016 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.
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/run_loop.h"
 #include "components/mus/public/interfaces/window_server_test.mojom.h"
 #include "services/shell/public/cpp/shell_test.h"
 
 namespace mash {
 namespace wm {
 
 void RunCallback(bool* success, const base::Closure& callback, bool result) {
   *success = result;
   callback.Run();
 }
 
 class AppLaunchTest : public shell::test::ShellTest {
  public:
   AppLaunchTest() : ShellTest("exe:mash_unittests") {}
   ~AppLaunchTest() override {}
 
+  bool LaunchApp(const std::string& app) {
+    connector()->Connect("mojo:desktop_wm");
+    connector()->Connect(app);
+
+    mus::mojom::WindowServerTestPtr test_interface;
+    connector()->ConnectToInterface("mojo:mus", &test_interface);
+
+    base::RunLoop run_loop;
+    bool success = false;
+    test_interface->EnsureClientHasDrawnWindow(
+        app, base::Bind(&RunCallback, &success, run_loop.QuitClosure()));
+    run_loop.Run();
+    return success;
+  }
+
  private:
   void SetUp() override {
     base::CommandLine::ForCurrentProcess()->AppendSwitch("use-test-config");
     ShellTest::SetUp();
   }
 
   DISALLOW_COPY_AND_ASSIGN(AppLaunchTest);
 };
 
 TEST_F(AppLaunchTest, TestQuickLaunch) {
-  connector()->Connect("mojo:desktop_wm");
-  connector()->Connect("mojo:quick_launch");
+  EXPECT_TRUE(LaunchApp("mojo:quick_launch"));
+}
 
-  mus::mojom::WindowServerTestPtr test_interface;
-  connector()->ConnectToInterface("mojo:mus", &test_interface);
-
-  base::RunLoop run_loop;
-  bool success = false;
-  test_interface->EnsureClientHasDrawnWindow(
-      "mojo:quick_launch",
-      base::Bind(&RunCallback, &success, run_loop.QuitClosure()));
-  run_loop.Run();
-  EXPECT_TRUE(success);
+TEST_F(AppLaunchTest, TestAshSysui) {
+  EXPECT_TRUE(LaunchApp("mojo:ash_sysui"));
 }
 
 }  // namespace wm
 }  // namespace mash