// Copyright 2021 The Dawn & Tint Authors
//
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// 1. Redistributions of source code must retain the above copyright notice, this
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#include "src/dawn/tests/DawnTest.h"
#include "src/dawn/utils/WGPUHelpers.h"

namespace dawn {
namespace {

class CommandEncoderTests : public DawnTest {};

// Tests WriteBuffer commands on CommandEncoder.
TEST_P(CommandEncoderTests, WriteBuffer) {
    wgpu::Buffer bufferA = utils::CreateBufferFromData(
        device, wgpu::BufferUsage::CopyDst | wgpu::BufferUsage::CopySrc, {0, 0, 0, 0});
    wgpu::Buffer bufferB = utils::CreateBufferFromData(
        device, wgpu::BufferUsage::CopyDst | wgpu::BufferUsage::CopySrc, {0, 0, 0, 0});
    wgpu::Buffer bufferC = utils::CreateBufferFromData(
        device, wgpu::BufferUsage::CopyDst | wgpu::BufferUsage::CopySrc, {0, 0, 0, 0});

    wgpu::CommandEncoder encoder = device.CreateCommandEncoder();

    const uint32_t kData1 = 1;
    encoder.WriteBuffer(bufferA, 0, reinterpret_cast<const uint8_t*>(&kData1), sizeof(kData1));
    encoder.CopyBufferToBuffer(bufferA, 0, bufferB, sizeof(uint32_t), 3 * sizeof(uint32_t));

    const uint32_t kData2 = 2;
    encoder.WriteBuffer(bufferB, 0, reinterpret_cast<const uint8_t*>(&kData2), sizeof(kData2));
    encoder.CopyBufferToBuffer(bufferB, 0, bufferC, sizeof(uint32_t), 3 * sizeof(uint32_t));

    wgpu::CommandBuffer commands = encoder.Finish();
    queue.Submit(1, &commands);

    EXPECT_BUFFER_U32_EQ(0, bufferC, 0);
    EXPECT_BUFFER_U32_EQ(2, bufferC, sizeof(uint32_t));
    EXPECT_BUFFER_U32_EQ(1, bufferC, 2 * sizeof(uint32_t));
    EXPECT_BUFFER_U32_EQ(0, bufferC, 3 * sizeof(uint32_t));
}

// Tests an empty WriteBuffer commands.
TEST_P(CommandEncoderTests, EmptyWriteBuffer) {
    wgpu::Buffer buffer =
        utils::CreateBufferFromData(device, wgpu::BufferUsage::CopyDst | wgpu::BufferUsage::CopySrc,
                                    {
                                        42,
                                    });

    wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
    encoder.WriteBuffer(buffer, 0, nullptr, 0);
    wgpu::CommandBuffer commands = encoder.Finish();
    queue.Submit(1, &commands);

    EXPECT_BUFFER_U32_EQ(42, buffer, 0);
}
DAWN_INSTANTIATE_TEST(CommandEncoderTests,
                      D3D11Backend(),
                      D3D12Backend(),
                      MetalBackend(),
                      OpenGLBackend(),
                      OpenGLESBackend(),
                      VulkanBackend(),
                      WebGPUBackend());

}  // anonymous namespace
}  // namespace dawn