// 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 "gpu/command_buffer/service/gl_context_virtual.h"

#include "gpu/command_buffer/service/gles2_cmd_decoder_mock.h"
#include "gpu/command_buffer/service/gpu_service_test.h"
#include "ui/gl/gl_context_stub.h"
#include "ui/gl/gl_share_group.h"
#include "ui/gl/gl_surface.h"

namespace gpu {
namespace gles2 {
namespace {

using testing::AnyNumber;
using testing::Return;

class GLContextVirtualTest : public GpuServiceTest {
 public:
  GLContextVirtualTest() : decoder_(new gles2::MockGLES2Decoder()) {}
  ~GLContextVirtualTest() override {}

 protected:
  std::unique_ptr<MockGLES2Decoder> decoder_;
};

// Tests that destroying a GLContextVirtual doesn't leave stale state that
// prevents a new one from initializing.
TEST_F(GLContextVirtualTest, Reinitialize) {
  EXPECT_CALL(*gl_, GetError())
      .Times(AnyNumber())
      .WillRepeatedly(Return(GL_NO_ERROR));
  EXPECT_CALL(*gl_, GetString(GL_VERSION))
      .Times(AnyNumber())
      .WillRepeatedly(Return(reinterpret_cast<unsigned const char *>("2.0")));
  EXPECT_CALL(*gl_, GetString(GL_EXTENSIONS))
      .Times(AnyNumber())
      .WillRepeatedly(Return(reinterpret_cast<unsigned const char *>("")));
  {
    scoped_refptr<gl::GLContextStub> base_context = new gl::GLContextStub;
    gl::GLShareGroup* share_group = base_context->share_group();
    share_group->SetSharedContext(base_context.get());
    scoped_refptr<GLContextVirtual> context(new GLContextVirtual(
        share_group, base_context.get(), decoder_->AsWeakPtr()));
    EXPECT_TRUE(context->Initialize(GetGLSurface(), gl::PreferIntegratedGpu));
    EXPECT_TRUE(context->MakeCurrent(GetGLSurface()));
  }
  {
    scoped_refptr<gl::GLContextStub> base_context = new gl::GLContextStub;
    gl::GLShareGroup* share_group = base_context->share_group();
    share_group->SetSharedContext(base_context.get());
    scoped_refptr<GLContextVirtual> context(new GLContextVirtual(
        share_group, base_context.get(), decoder_->AsWeakPtr()));
    EXPECT_TRUE(context->Initialize(GetGLSurface(), gl::PreferIntegratedGpu));
    EXPECT_TRUE(context->MakeCurrent(GetGLSurface()));
  }
}

}  // anonymous namespace
}  // namespace gles2
}  // namespace gpu
