/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <gtest/gtest.h>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <limits>
#include <locale>

#define LOG_TAG "EffectParamWrapper_Test"
#include <log/log.h>
#include <system/audio_effects/audio_effects_utils.h>

using namespace android;
using android::effect::utils::EffectParamReader;
using android::effect::utils::EffectParamWrapper;
using android::effect::utils::EffectParamWriter;
using android::effect::utils::operator==;
using android::effect::utils::operator!=;
using android::effect::utils::ToString;

TEST(EffectParamWrapperTest, setAndGetMatches) {
    effect_param_t param = {.psize = 2, .vsize = 0x10};
    const auto wrapper = EffectParamWrapper(param);
    effect_param_t target = wrapper.getEffectParam();
    const auto targetWrapper = EffectParamWrapper(target);
    EXPECT_TRUE(0 == std::memcmp(&param, &target, sizeof(effect_param_t)));
    EXPECT_EQ(targetWrapper, wrapper);
}

TEST(EffectParamWrapperTest, validateCmdSize) {
    effect_param_t param = {.psize = 1, .vsize = 4};
    const auto wrapper = EffectParamWrapper(param);
    size_t minCmdSize = sizeof(effect_param_t) +
                        wrapper.getPaddedParameterSize() +
                        wrapper.getValueSize();
    EXPECT_FALSE(wrapper.validateCmdSize(minCmdSize - 1));
    EXPECT_TRUE(wrapper.validateCmdSize(minCmdSize));
    EXPECT_TRUE(wrapper.validateCmdSize(minCmdSize + 1));
}

TEST(EffectParamWrapperTest, validateCmdSizeOverflow) {
    effect_param_t param = {.psize = std::numeric_limits<uint32_t>::max(),
                            .vsize = std::numeric_limits<uint32_t>::max()};
    const auto wrapper = EffectParamWrapper(param);
    uint64_t minCmdSize = (uint64_t)sizeof(effect_param_t) +
                          wrapper.getPaddedParameterSize() +
                          wrapper.getValueSize();
    EXPECT_FALSE(wrapper.validateCmdSize(minCmdSize - 1));
    EXPECT_TRUE(wrapper.validateCmdSize(minCmdSize));
    EXPECT_TRUE(wrapper.validateCmdSize(minCmdSize + 1));
}

TEST(EffectParamWrapperTest, validateParamValueSize) {
    effect_param_t param = {.psize = 1, .vsize = 4};
    const auto wrapper = EffectParamWrapper(param);
    EXPECT_TRUE(wrapper.validateParamValueSize(param.psize, param.vsize));
    EXPECT_TRUE(wrapper.validateParamValueSize(0, param.vsize));
    EXPECT_TRUE(wrapper.validateParamValueSize(param.psize, 0));
    EXPECT_FALSE(wrapper.validateParamValueSize(param.psize + 1, 0));
    EXPECT_FALSE(wrapper.validateParamValueSize(0, param.vsize + 1));
}

TEST(EffectParamWrapperTest, padding) {
    for (size_t i = 0; i < 0x100; i++) {
      EXPECT_EQ(
          sizeof(uint32_t) * ((i + sizeof(uint32_t) - 1) / sizeof(uint32_t)),
          EffectParamWrapper::padding(i))
          << i;
    }
}

TEST(EffectParamWrapperTest, getPaddedParameterSize) {
    effect_param_t psize1 = {.psize = 1};
    const auto wrapper1 = EffectParamWrapper(psize1);
    EXPECT_EQ(4, wrapper1.getPaddedParameterSize());
    EXPECT_EQ(4, wrapper1.padding(psize1.psize));

    effect_param_t psize4 = {.psize = 4};
    const auto wrapper4 = EffectParamWrapper(psize4);
    EXPECT_EQ(4, wrapper4.getPaddedParameterSize());
    EXPECT_EQ(wrapper4.getPaddedParameterSize(), wrapper4.padding(psize4.psize));

    effect_param_t psize6 = {.psize = 6};
    const auto wrapper6 = EffectParamWrapper(psize6);
    EXPECT_EQ(8, wrapper6.getPaddedParameterSize());
    EXPECT_EQ(wrapper6.getPaddedParameterSize(), wrapper6.padding(psize6.psize));
}

TEST(EffectParamWrapperTest, getPVSize) {
    effect_param_t vsize1 = {.psize = 0xff, .vsize = 1};
    const auto wrapper1 = EffectParamWrapper(vsize1);
    EXPECT_EQ(vsize1.vsize, wrapper1.getValueSize());

    effect_param_t vsize2 = {.psize = 0xbe, .vsize = 0xff};
    const auto wrapper2 = EffectParamWrapper(vsize2);
    EXPECT_EQ(vsize2.vsize, wrapper2.getValueSize());

    EXPECT_EQ(vsize1.psize, wrapper1.getParameterSize());
    EXPECT_EQ(vsize1.vsize, wrapper1.getValueSize());
    EXPECT_EQ(sizeof(effect_param_t) + EffectParamWrapper::padding(vsize1.psize) + vsize1.vsize,
              wrapper1.getTotalSize());

    EXPECT_EQ(vsize2.psize, wrapper2.getParameterSize());
    EXPECT_EQ(vsize2.vsize, wrapper2.getValueSize());
    EXPECT_EQ(sizeof(effect_param_t) + EffectParamWrapper::padding(vsize2.psize) + vsize2.vsize,
              wrapper2.getTotalSize());
}

TEST(EffectParamWrapperTest, toString) {
    effect_param_t param = {.status = -1, .psize = 2, .vsize = 4};
    const auto wrapper = EffectParamWrapper(param);
    EXPECT_TRUE(wrapper.toString().find("effect_param_t: ") != std::string::npos);
    EXPECT_TRUE(wrapper.toString().find("status: -1") != std::string::npos);
    EXPECT_TRUE(wrapper.toString().find("p: 2") != std::string::npos);
    EXPECT_TRUE(wrapper.toString().find("v: 4") != std::string::npos);
}

TEST(EffectParamWriterTest, writeReadFromData) {
    constexpr uint32_t dataLength = 8;
    constexpr uint16_t testData[dataLength] = {0x200,  0x0,    0xffffu, 0xbead,
                                               0xfefe, 0x5555, 0xeeee,  0x2};
    uint16_t targetData[dataLength] = {0};
    char buf[sizeof(effect_param_t) + sizeof(testData)];
    effect_param_t *param = (effect_param_t *)(&buf);
    param->psize = 0;
    param->vsize = sizeof(testData);
    auto wrapper = EffectParamWriter(*param);

    // write testData into effect_param_t data buffer
    ASSERT_EQ(OK, wrapper.writeToData(&testData, sizeof(testData) /* len */,
                                0 /* offset */, sizeof(testData) /* max */))
        << wrapper.toString();

    // read first half and compare
    EXPECT_EQ(OK,
              wrapper.readFromData(
                  &targetData, dataLength * sizeof(uint16_t) >> 1 /* len */,
                  0 /* offset */, dataLength * sizeof(uint16_t) >> 1 /* max */))
        << wrapper.toString();
    EXPECT_EQ(0, std::memcmp(&testData, &targetData,
                             dataLength * sizeof(uint16_t) >> 1));

    // read second half and compare
    std::memset(&targetData, 0, sizeof(testData));
    EXPECT_EQ(OK, wrapper.readFromData(
                      &targetData, dataLength * sizeof(uint16_t) >> 1 /* len */,
                      dataLength * sizeof(uint16_t) >> 1 /* offset */,
                      sizeof(testData) /* max */))
        << wrapper.toString();
    EXPECT_EQ(0, std::memcmp(testData + dataLength / 2, &targetData,
                             dataLength * sizeof(uint16_t) >> 1));

    // read all and compare
    std::memset(&targetData, 0, sizeof(testData));
    EXPECT_EQ(OK, wrapper.readFromData(&targetData, sizeof(testData), 0 /* offset */,
                                       sizeof(testData) /* max */))
        << wrapper.toString();
    EXPECT_EQ(0, std::memcmp(&testData, &targetData, sizeof(testData)));
}

TEST(EffectParamWriterReaderTest, writeAndReadParameterOneByOne) {
    constexpr uint16_t data[11] = {
        0x0f0f, 0x2020, 0xffff, 0xbead, 0x5e5e, 0x0 /* padding */,
        0xe5e5, 0xeeee, 0x1111, 0x8888, 0xabab};
    char buf[sizeof(effect_param_t) + sizeof(data)] = {};
    effect_param_t *param = (effect_param_t *)(&buf);
    param->psize = 5 * sizeof(uint16_t);
    param->vsize = 5 * sizeof(uint16_t);
    auto writer = EffectParamWriter(*param);
    auto reader = EffectParamReader(*param);

    // write testData into effect_param_t data buffer
    EXPECT_EQ(OK, writer.writeToParameter(&data[0]));
    EXPECT_EQ(OK, writer.writeToParameter(&data[1]));
    EXPECT_EQ(OK, writer.writeToParameter(&data[2]));
    EXPECT_EQ(OK, writer.writeToParameter(&data[3]));
    EXPECT_EQ(OK, writer.writeToParameter(&data[4]));
    EXPECT_NE(OK, writer.writeToParameter(&data[5])); // expect write error
    EXPECT_EQ(OK, writer.writeToValue(&data[6]));
    EXPECT_EQ(OK, writer.writeToValue(&data[7]));
    EXPECT_EQ(OK, writer.writeToValue(&data[8]));
    EXPECT_EQ(OK, writer.writeToValue(&data[9]));
    EXPECT_EQ(OK, writer.writeToValue(&data[10]));
    EXPECT_NE(OK, writer.writeToValue(&data[10])); // expect write error

    // read and compare
    uint16_t getData[12] = {};
    EXPECT_EQ(OK, reader.readFromParameter(&getData[0]));
    EXPECT_EQ(OK, reader.readFromParameter(&getData[1]));
    EXPECT_EQ(OK, reader.readFromParameter(&getData[2]));
    EXPECT_EQ(OK, reader.readFromParameter(&getData[3]));
    EXPECT_EQ(OK, reader.readFromParameter(&getData[4]));
    EXPECT_NE(OK, reader.readFromParameter(&getData[5])); // expect read error

    EXPECT_EQ(OK, reader.readFromValue(&getData[6]));
    EXPECT_EQ(OK, reader.readFromValue(&getData[7]));
    EXPECT_EQ(OK, reader.readFromValue(&getData[8]));
    EXPECT_EQ(OK, reader.readFromValue(&getData[9]));
    EXPECT_EQ(OK, reader.readFromValue(&getData[10]));
    EXPECT_NE(OK, reader.readFromValue(&getData[11])); // expect read error

    EXPECT_EQ(0, std::memcmp(&buf[sizeof(effect_param_t)], &data, sizeof(data)));
    EXPECT_EQ(0, std::memcmp(&getData, &data, sizeof(data)));
}

TEST(EffectParamWriterReaderTest, writeAndReadParameterN) {
    constexpr uint16_t data[11] = {
        0x0f0f, 0x2020, 0xffff, 0x1111, 0xabab, 0x0 /* padding */,
        0xe5e5, 0xeeee, 0xbead, 0x8888, 0x5e5e};
    char buf[sizeof(effect_param_t) + sizeof(data)] = {};
    effect_param_t *param = (effect_param_t *)(&buf);
    param->psize = 5 * sizeof(uint16_t);
    param->vsize = 5 * sizeof(uint16_t);
    auto writer = EffectParamWriter(*param);
    auto reader = EffectParamReader(*param);

    // write testData into effect_param_t data buffer
    EXPECT_EQ(OK, writer.writeToParameter(&data[0]));
    EXPECT_EQ(OK, writer.writeToParameter(&data[1], 2));
    EXPECT_EQ(OK, writer.writeToParameter(&data[3], 2));
    EXPECT_NE(OK, writer.writeToParameter(&data[5])); // expect write error
    EXPECT_EQ(OK, writer.writeToValue(&data[6], 3));
    EXPECT_EQ(OK, writer.writeToValue(&data[9], 2));
    EXPECT_NE(OK, writer.writeToValue(&data[10])); // expect write error

    // read and compare
    uint16_t getData[12] = {};
    EXPECT_EQ(OK, reader.readFromParameter(&getData[0], 2));
    EXPECT_EQ(OK, reader.readFromParameter(&getData[2]));
    EXPECT_EQ(OK, reader.readFromParameter(&getData[3], 2));
    EXPECT_NE(OK, reader.readFromParameter(&getData[5])); // expect read error

    EXPECT_EQ(OK, reader.readFromValue(&getData[6]));
    EXPECT_EQ(OK, reader.readFromValue(&getData[7], 2));
    EXPECT_EQ(OK, reader.readFromValue(&getData[9], 2));
    EXPECT_NE(OK, reader.readFromValue(&getData[11])); // expect read error

    EXPECT_EQ(0, std::memcmp(&buf[sizeof(effect_param_t)], &data, sizeof(data)));
    EXPECT_EQ(0, std::memcmp(&getData, &data, sizeof(data)));
}

TEST(EffectParamWriterReaderTest, writeAndReadParameterBlock) {
    constexpr uint16_t data[11] = {
        0xe5e5, 0xeeee, 0x1111, 0x8888, 0xabab, 0x0, /* padding */
        0x0f0f, 0x2020, 0xffff, 0xbead, 0x5e5e,
    };
    char buf[sizeof(effect_param_t) + sizeof(data)] = {};
    effect_param_t *param = (effect_param_t *)(&buf);
    param->psize = 5 * sizeof(uint16_t);
    param->vsize = 5 * sizeof(uint16_t);
    auto writer = EffectParamWriter(*param);
    auto reader = EffectParamReader(*param);

    // write testData into effect_param_t data buffer
    EXPECT_EQ(OK, writer.writeToParameter(&data[0], 5));
    EXPECT_NE(OK, writer.writeToParameter(&data[5])); // expect write error
    EXPECT_EQ(OK, writer.writeToValue(&data[6], 5));
    EXPECT_NE(OK, writer.writeToValue(&data[10])); // expect write error
    writer.finishValueWrite();
    EXPECT_EQ(5 * sizeof(uint16_t), writer.getValueSize());
    EXPECT_EQ(sizeof(effect_param_t) +
                  6 * sizeof(uint16_t) /* padded parameter */ +
                  5 * sizeof(uint16_t),
              writer.getTotalSize())
        << writer.toString();

    // read and compare
    uint16_t getData[12] = {};
    EXPECT_EQ(OK, reader.readFromParameter(&getData[0], 5));
    EXPECT_NE(OK, reader.readFromParameter(&getData[5])); // expect read error

    EXPECT_EQ(OK, reader.readFromValue(&getData[6], 5));
    EXPECT_NE(OK, reader.readFromValue(&getData[11])); // expect read error

    EXPECT_EQ(0, std::memcmp(&buf[sizeof(effect_param_t)], &data, sizeof(data)));
    EXPECT_EQ(0, std::memcmp(&getData, &data, sizeof(data)));
}

TEST(EffectParamWriterTest, setStatus) {
    effect_param_t param = {.status = -1, .psize = 2, .vsize = 4};
    auto wrapper = EffectParamWriter(param);
    EXPECT_EQ(-1, wrapper.getStatus()) << wrapper.toString();
    wrapper.setStatus(0);
    EXPECT_EQ(0, wrapper.getStatus()) << wrapper.toString();
    EXPECT_EQ(wrapper.getStatus(), param.status);
    wrapper.setStatus(0x10);
    EXPECT_EQ(0x10, wrapper.getStatus()) << wrapper.toString();
    EXPECT_EQ(wrapper.getStatus(), param.status) << wrapper.toString();
}

TEST(EffectParamWriterReaderTest, writeAndReadParameterDiffSize) {
    constexpr uint16_t data[11] = {
        0xbead, 0x5e5e, 0x0f0f, 0x2020, 0xffff, 0x0 /* padding */,
        0xe5e5, 0xeeee, 0x1111, 0x8888, 0xabab};
    char buf[sizeof(effect_param_t) + sizeof(data)] = {};
    effect_param_t *param = (effect_param_t *)(&buf);
    param->psize = 5 * sizeof(uint16_t);
    param->vsize = 5 * sizeof(uint16_t);
    auto writer = EffectParamWriter(*param);
    auto reader = EffectParamReader(*param);

    // write testData into effect_param_t data buffer
    EXPECT_EQ(OK, writer.writeToParameter(&data[0]));
    EXPECT_EQ(OK, writer.writeToParameter((uint32_t *)&data[1]));
    EXPECT_EQ(OK, writer.writeToParameter((uint32_t *)&data[3]));
    EXPECT_NE(OK, writer.writeToParameter(&data[5])); // expect write error
    EXPECT_EQ(OK, writer.writeToValue((uint32_t *)&data[6], 2));
    EXPECT_EQ(OK, writer.writeToValue(&data[10]));
    writer.finishValueWrite();
    EXPECT_EQ(5 * sizeof(uint16_t), writer.getValueSize());
    EXPECT_EQ(sizeof(effect_param_t) + sizeof(data), writer.getTotalSize())
        << writer.toString();
    EXPECT_NE(OK, writer.writeToValue(&data[10])); // expect write error
    writer.finishValueWrite();
    EXPECT_EQ(5 * sizeof(uint16_t), writer.getValueSize());
    EXPECT_EQ(sizeof(effect_param_t) + sizeof(data), writer.getTotalSize())
        << writer.toString();

    // read and compare
    uint16_t getData[12] = {};
    EXPECT_EQ(OK, reader.readFromParameter((uint32_t *)&getData[0], 2));
    EXPECT_EQ(OK, reader.readFromParameter(&getData[4]));
    EXPECT_NE(OK, reader.readFromParameter(&getData[5])); // expect read error

    EXPECT_EQ(OK, reader.readFromValue(&getData[6]));
    EXPECT_EQ(OK, reader.readFromValue((uint32_t *)&getData[7]));
    EXPECT_EQ(OK, reader.readFromValue((uint32_t *)&getData[9]));
    EXPECT_NE(OK, reader.readFromValue(&getData[11])); // expect read error

    EXPECT_EQ(0, std::memcmp(&buf[sizeof(effect_param_t)], &data, sizeof(data)));
    EXPECT_EQ(0, std::memcmp(&getData, &data, sizeof(data)));
}

TEST(EffectParamWriterTest, overwriteWithSameSize) {
    constexpr uint32_t pSizeInShorts = 5, vSizeInShorts = 4;
    constexpr uint16_t
        data[EffectParamWrapper::padding(pSizeInShorts) + vSizeInShorts] = {
            // parameter
            0xe5e5, 0xeeee, 0x1111, 0x8888, 0xabab, 0x0 /* padding */,
            // value
            0x0f0f, 0x2020, 0xffff, 0xbead};
    char buf[sizeof(effect_param_t) + sizeof(data)] = {};
    effect_param_t *param = (effect_param_t *)(&buf);
    param->psize = pSizeInShorts * sizeof(uint16_t); // padded to 6 * sizeof(uint16_t)
    param->vsize = vSizeInShorts * sizeof(uint16_t);
    auto writer = EffectParamWriter(*param);
    EXPECT_EQ(OK, writer.writeToParameter(&data[0], pSizeInShorts));
    EXPECT_EQ(OK, writer.writeToValue(&data[6], vSizeInShorts));
    writer.finishValueWrite();

    constexpr uint32_t newPSizeInShorts = 3, newVSizeInShorts = 6;
    constexpr uint16_t
        newdata[EffectParamWrapper::padding(newPSizeInShorts) + newVSizeInShorts] = {
            // parameter
            0xffff, 0x2020, 0xbead, 0x0 /* padding */,
            // value
            0xabab, 0xeeee, 0x0f0f, 0x5e5e, 0x8888, 0xe5e5};
    char newbuf[sizeof(effect_param_t) + sizeof(newdata)] = {};
    effect_param_t *newparam = (effect_param_t *)(&newbuf);
    newparam->psize = newPSizeInShorts * sizeof(uint16_t); // padded to 4 * sizeof(uint16_t)
    newparam->vsize = newVSizeInShorts * sizeof(uint16_t);
    auto newwriter = EffectParamWriter(*newparam);
    EXPECT_EQ(OK, newwriter.writeToParameter(newdata, newPSizeInShorts));
    EXPECT_EQ(OK, newwriter.writeToValue(
                      &newdata[EffectParamWrapper::padding(newPSizeInShorts)],
                      newVSizeInShorts));
    newwriter.finishValueWrite();

    EXPECT_EQ(OK, writer.overwrite(newwriter.getEffectParam()));
    EXPECT_EQ(0,
              std::memcmp(&writer.getEffectParam(), &newwriter.getEffectParam(),
                          newwriter.getTotalSize()));
    EXPECT_EQ(newwriter.getParameterSize(), writer.getParameterSize());
    EXPECT_EQ(newwriter.getValueSize(), writer.getValueSize());
}

TEST(EffectParamWriterTest, overwriteWithLargerSize) {
    constexpr uint32_t pSizeInShorts = 5, vSizeInShorts = 4;
    constexpr uint16_t data[EffectParamWrapper::padding(pSizeInShorts) + vSizeInShorts] = {
        // parameter
        0xe5e5, 0xeeee, 0x1111, 0x8888, 0xabab, 0x0 /* padding */,
        // value
        0x0f0f, 0x2020, 0xffff, 0xbead};
    char buf[sizeof(effect_param_t) + sizeof(data)] = {};
    effect_param_t *param = (effect_param_t *)(&buf);
    param->psize = pSizeInShorts * sizeof(uint16_t); // padded to 6 * sizeof(uint16_t)
    param->vsize = vSizeInShorts * sizeof(uint16_t);
    auto writer = EffectParamWriter(*param);
    EXPECT_EQ(OK, writer.writeToParameter(&data[0], pSizeInShorts));
    EXPECT_EQ(OK, writer.writeToValue(&data[6], vSizeInShorts));
    writer.finishValueWrite();

    constexpr uint32_t newPSizeInShorts = 3, newVSizeInShorts = 8;
    constexpr uint16_t
        newdata[EffectParamWrapper::padding(newPSizeInShorts) + newVSizeInShorts] = {
            // parameter
            0xffff, 0x2020, 0xbead, 0x0 /* padding */,
            // value
            0xabab, 0xeeee, 0x0f0f, 0x5e5e, 0x8888, 0xe5e5, 0x5f5f, 0x1234};
    char newbuf[sizeof(effect_param_t) + sizeof(newdata)] = {};
    effect_param_t *newparam = (effect_param_t *)(&newbuf);
    newparam->psize = newPSizeInShorts * sizeof(uint16_t); // padded to 4 * sizeof(uint16_t)
    newparam->vsize = newVSizeInShorts * sizeof(uint16_t);
    auto newwriter = EffectParamWriter(*newparam);
    EXPECT_EQ(OK, newwriter.writeToParameter(newdata, newPSizeInShorts));
    EXPECT_EQ(OK, newwriter.writeToValue(
                      &newdata[EffectParamWrapper::padding(newPSizeInShorts)],
                      newVSizeInShorts));
    newwriter.finishValueWrite();

    EXPECT_NE(OK, writer.overwrite(newwriter.getEffectParam()));
}

TEST(AudioEffectsUtilsTest, EqualityOperator) {
    audio_uuid_t uuid1 = {0x12345678, 0x1234, 0x5678, 0x90AB, {0xDE, 0xAD, 0xBE, 0xEF, 0x00, 0x01}};
    audio_uuid_t uuid2 = {0x12345678, 0x1234, 0x5678, 0x90AB, {0xDE, 0xAD, 0xBE, 0xEF, 0x00, 0x01}};

    EXPECT_TRUE(uuid1 == uuid2);
    EXPECT_FALSE(uuid1 != uuid2);
}

TEST(AudioEffectsUtilsTest, InequalityOperator) {
    audio_uuid_t uuid1 = {0x12345678, 0x1234, 0x5678, 0x90AB, {0xDE, 0xAD, 0xBE, 0xEF, 0x00, 0x01}};
    audio_uuid_t uuid2 = {0x87654321, 0x4321, 0x8765, 0xBA09, {0x01, 0x00, 0xEF, 0xBE, 0xAD, 0xDE}};

    EXPECT_TRUE(uuid1 != uuid2);
    EXPECT_FALSE(uuid1 == uuid2);
}

TEST(AudioEffectsUtilsTest, EqualityWithModifiedNode) {
    audio_uuid_t uuid1 = {0x12345678, 0x1234, 0x5678, 0x90AB, {0xDE, 0xAD, 0xBE, 0xEF, 0x00, 0x01}};
    audio_uuid_t uuid2 = uuid1;
    uuid2.node[5] = 0x02;  // Modify one byte in the `node` array

    EXPECT_FALSE(uuid1 == uuid2);
    EXPECT_TRUE(uuid1 != uuid2);
}

TEST(AudioEffectsUtilsTest, ToString) {
    audio_uuid_t uuid = {0x12345678, 0x1234, 0x5678, 0x90AB, {0xDE, 0xAD, 0xBE, 0xEF, 0x00, 0x01}};
    std::string expected = "12345678-1234-5678-90ab-deadbeef0001";

    EXPECT_EQ(ToString(uuid), expected);
}

TEST(AudioEffectsUtilsTest, ToStringUpperCase) {
    audio_uuid_t uuid = {0x87654321, 0x4321, 0x8765, 0xBA09, {0x01, 0x00, 0xEF, 0xBE, 0xAD, 0xDE}};
    std::string expected = "87654321-4321-8765-ba09-0100efbeadde";

    EXPECT_EQ(ToString(uuid), expected);
}

TEST(AudioEffectsUtilsTest, ToStringAllZeros) {
    audio_uuid_t uuid = {0, 0, 0, 0, {0, 0, 0, 0, 0, 0}};
    std::string expected = "00000000-0000-0000-0000-000000000000";

    EXPECT_EQ(ToString(uuid), expected);
}

TEST(AudioEffectsUtilsTest, ToStringBoundaryValues) {
    audio_uuid_t uuid = {0xFFFFFFFF, 0xFFFF, 0xFFFF, 0xFFFF, {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}};
    std::string expected = "ffffffff-ffff-ffff-ffff-ffffffffffff";

    EXPECT_EQ(ToString(uuid), expected);
}