text: // 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 "cc/surfaces/surface.h"
  #include "cc/surfaces/surface_factory.h"
  #include "cc/surfaces/surface_factory_client.h"
  #include "cc/surfaces/surface_id_allocator.h"
  #include "cc/surfaces/surface_manager.h"
  #include "cc/test/scheduler_test_common.h"
  #include "testing/gtest/include/gtest/gtest.h"
  #include "ui/gfx/geometry/size.h"
  
  namespace cc {
  namespace {
  
  class FakeSurfaceFactoryClient : public SurfaceFactoryClient {
   public:
    FakeSurfaceFactoryClient() : begin_frame_source_(nullptr) {}
  
    void ReturnResources(const ReturnedResourceArray& resources) override {}
  
    void SetBeginFrameSource(BeginFrameSource* begin_frame_source) override {
      begin_frame_source_ = begin_frame_source;
    }
  
    BeginFrameSource* begin_frame_source() { return begin_frame_source_; }
  
   private:
    BeginFrameSource* begin_frame_source_;
  };
  
  TEST(SurfaceTest, SurfaceLifetime) {
    SurfaceManager manager;
    FakeSurfaceFactoryClient surface_factory_client;
    SurfaceFactory factory(&manager, &surface_factory_client);
  
    SurfaceId surface_id(0, 6, 0);
    {
      factory.Create(surface_id);
      EXPECT_TRUE(manager.GetSurfaceForId(surface_id));
      factory.Destroy(surface_id);
    }
  
    EXPECT_EQ(NULL, manager.GetSurfaceForId(surface_id));
  }
  
  TEST(SurfaceTest, SurfaceIds) {
    uint32_t namespaces[] = {0u, 37u, ~0u};
    for (size_t i = 0; i < 3; ++i) {
      uint32_t id_namespace = namespaces[i];
      SurfaceIdAllocator allocator(id_namespace);
      SurfaceId id1 = allocator.GenerateId();
      EXPECT_EQ(id1.id_namespace(), id_namespace);
      SurfaceId id2 = allocator.GenerateId();
      EXPECT_EQ(id2.id_namespace(), id_namespace);
      EXPECT_NE(id1.local_id(), id2.local_id());
      EXPECT_NE(id1.nonce(), id2.nonce());
    }
  }
  
  }  // namespace
  }  // namespace cc
  