mus: Implement Window Server Capture

components/mus/public/cpp/tests/window_unittest.cc

 // 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.
 
 #include "components/mus/public/cpp/window.h"
 
 #include <limits.h>
 #include <stdint.h>
 
 #include "base/logging.h"
@@ skipping 1114 matching lines @@
   scoped_ptr<TestWindow> parent(CreateTestWindow(0, nullptr));
   scoped_ptr<TestWindow> window0(CreateTestWindow(1, parent.get()));
   scoped_ptr<TestWindow> window1(CreateTestWindow(2, parent.get()));
 
   TestWindow* window2 = CreateTestWindow(3, parent.get());
 
   window0->AddTransientWindow(window2);
   EXPECT_EQ("1 3 2", ChildWindowIDsAsString(parent.get()));
 }
 
+// Tests that a window does not have capture until it is explicitly set.
+TEST_F(WindowTest, SetCapture) {
+  TestWindow w;
+  ASSERT_FALSE(w.has_capture());
+  w.SetCapture();
+  EXPECT_TRUE(w.has_capture());
+  w.ReleaseCapture();
+  EXPECT_FALSE(w.has_capture());
+}
+
 }  // namespace mus