components: Add Exosphere component.

components/exo/buffer_unittest.cc

+// 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.
+
+#include "base/bind.h"
+#include "cc/resources/single_release_callback.h"
+#include "components/exo/buffer.h"
+#include "components/exo/surface.h"
+#include "components/exo/test/exo_test_base.h"
+#include "components/exo/test/exo_test_helper.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/gpu_memory_buffer.h"
+
+namespace exo {
+namespace {
+
+using BufferTest = test::ExoTestBase;
+
+void Release(int* release_call_count) {
+  (*release_call_count)++;
+}
+
+TEST_F(BufferTest, ReleaseCallback) {
+  gfx::Size buffer_size(256, 256);
+  scoped_ptr<Buffer> buffer(
+      new Buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size).Pass()));
+
+  // Set the release callback.
+  int release_call_count = 0;
+  buffer->set_release_callback(
+      base::Bind(&Release, base::Unretained(&release_call_count)));
+
+  // Acquire a texture mailbox for the contents of the buffer.
+  cc::TextureMailbox texture_mailbox;
+  scoped_ptr<cc::SingleReleaseCallback> buffer_release_callback =
+      buffer->GetTextureMailbox(&texture_mailbox);
+  ASSERT_TRUE(buffer_release_callback);
+
+  // Trying to acquire an already in-use buffer should fail.
+  EXPECT_FALSE(buffer->GetTextureMailbox(&texture_mailbox));
+
+  // Release buffer.
+  buffer_release_callback->Run(gpu::SyncToken(), false);
+
+  // Release() should have been called exactly once.
+  ASSERT_EQ(release_call_count, 1);
+}
+
+}  // namespace
+}  // namespace exo