Runs most aura tests with both backends

ui/aura/test/aura_test_base.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_AURA_TEST_AURA_TEST_BASE_H_
 #define UI_AURA_TEST_AURA_TEST_BASE_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/mus/window_manager_delegate.h"
 #include "ui/aura/mus/window_tree_client_delegate.h"
 #include "ui/aura/test/aura_test_helper.h"
 
 namespace ui {
 namespace mojom {
 class WindowTreeClient;
 }
 }
 
 namespace aura {
 class Window;
 class WindowDelegate;
 class WindowManagerDelegate;
 class WindowTreeClientDelegate;
 
 namespace test {
 
+enum class BackendType { CLASSIC, MUS };
+
 // A base class for aura unit tests.
 // TODO(beng): Instances of this test will create and own a RootWindow.
 class AuraTestBase : public testing::Test,
                      public WindowTreeClientDelegate,
                      public WindowManagerDelegate {
  public:
   AuraTestBase();
   ~AuraTestBase() override;
 
   // testing::Test:
@@ skipping 11 matching lines @@
   }
 
   void set_window_tree_client_delegate(
       WindowTreeClientDelegate* window_tree_client_delegate) {
     window_tree_client_delegate_ = window_tree_client_delegate;
   }
 
   // Turns on mus. Must be called before SetUp().
   void EnableMus();
 
+  // Used to configure the backend. This is exposed to make parameterized tests
+  // easy to write. This *must* be called from SetUp().
+  void ConfigureBackend(BackendType type);
+
   void RunAllPendingInMessageLoop();
 
   void ParentWindow(Window* window);
 
   // A convenience function for dispatching an event to |dispatcher()|.
   // Returns whether |event| was handled.
   bool DispatchEventUsingWindowDispatcher(ui::Event* event);
 
   Window* root_window() { return helper_->root_window(); }
   WindowTreeHost* host() { return helper_->host(); }
@@ skipping 50 matching lines @@
   bool use_mus_ = false;
   bool setup_called_ = false;
   bool teardown_called_ = false;
   base::MessageLoopForUI message_loop_;
   std::unique_ptr<PropertyConverter> property_converter_;
   std::unique_ptr<AuraTestHelper> helper_;
 
   DISALLOW_COPY_AND_ASSIGN(AuraTestBase);
 };
 
+// Use as a base class for tests that want to target both backends.
+class AuraTestBaseWithType : public AuraTestBase,
+                             public ::testing::WithParamInterface<BackendType> {
+ public:
+  AuraTestBaseWithType();
+  ~AuraTestBaseWithType() override;
+
+  // AuraTestBase:
+  void SetUp() override;
+
+ private:
+  bool setup_called_ = false;
+
+  DISALLOW_COPY_AND_ASSIGN(AuraTestBaseWithType);
+};
+
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_AURA_TEST_BASE_H_