// Copyright 2019 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#include "src/dawn/tests/unittests/wire/WireTest.h"

namespace dawn::wire {
namespace {

using testing::Return;

class WireBasicTests : public WireTest {
  public:
    WireBasicTests() {}
    ~WireBasicTests() override = default;
};

// One call gets forwarded correctly.
TEST_F(WireBasicTests, CallForwarded) {
    wgpu::CommandEncoder encoder = device.CreateCommandEncoder();

    WGPUCommandEncoder apiCmdBufEncoder = api.GetNewCommandEncoder();
    EXPECT_CALL(api, DeviceCreateCommandEncoder(apiDevice, nullptr))
        .WillOnce(Return(apiCmdBufEncoder));

    FlushClient();
}

// Test that calling methods on a new object works as expected.
TEST_F(WireBasicTests, CreateThenCall) {
    wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
    wgpu::CommandBuffer commands = encoder.Finish();

    WGPUCommandEncoder apiCmdBufEncoder = api.GetNewCommandEncoder();
    EXPECT_CALL(api, DeviceCreateCommandEncoder(apiDevice, nullptr))
        .WillOnce(Return(apiCmdBufEncoder));

    WGPUCommandBuffer apiCmdBuf = api.GetNewCommandBuffer();
    EXPECT_CALL(api, CommandEncoderFinish(apiCmdBufEncoder, nullptr)).WillOnce(Return(apiCmdBuf));

    FlushClient();
}

// Test that client reference/release do not call the backend API.
TEST_F(WireBasicTests, RefCountKeptInClient) {
    wgpu::CommandEncoder encoder = device.CreateCommandEncoder();

    wgpu::CommandEncoder encoder2 = encoder;
    encoder2 = nullptr;

    WGPUCommandEncoder apiCmdBufEncoder = api.GetNewCommandEncoder();
    EXPECT_CALL(api, DeviceCreateCommandEncoder(apiDevice, nullptr))
        .WillOnce(Return(apiCmdBufEncoder));

    FlushClient();
}

// Test that client reference/release calls the backend API.
TEST_F(WireBasicTests, ReleaseCalledOnRefCount0) {
    wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
    encoder = nullptr;

    WGPUCommandEncoder apiCmdBufEncoder = api.GetNewCommandEncoder();
    EXPECT_CALL(api, DeviceCreateCommandEncoder(apiDevice, nullptr))
        .WillOnce(Return(apiCmdBufEncoder));

    EXPECT_CALL(api, CommandEncoderRelease(apiCmdBufEncoder));

    FlushClient();
}

}  // anonymous namespace
}  // namespace dawn::wire
