Merge "Add FormatUtilsTest."

    suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table_test.cpp \

    suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer_test.cpp \

    suggest/policyimpl/dictionary/utils/byte_array_utils_test.cpp \

    suggest/policyimpl/dictionary/utils/format_utils_test.cpp \

    suggest/policyimpl/dictionary/utils/sparse_table_test.cpp \

    suggest/policyimpl/dictionary/utils/trie_map_test.cpp \

    suggest/policyimpl/utils/damerau_levenshtein_edit_distance_policy_test.cpp \

/*

 * Copyright (C) 2014 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 "suggest/policyimpl/dictionary/utils/format_utils.h"

#include <gtest/gtest.h>

#include <vector>

#include "utils/byte_array_view.h"

namespace latinime {

namespace {

TEST(FormatUtilsTest, TestMagicNumber) {

    EXPECT_EQ(0x9BC13AFE, FormatUtils::MAGIC_NUMBER) << "Magic number must not be changed.";

}

const std::vector<uint8_t> getBuffer(const int magicNumber, const int version, const uint16_t flags,

        const size_t headerSize) {

    std::vector<uint8_t> buffer;

    buffer.push_back(magicNumber >> 24);

    buffer.push_back(magicNumber >> 16);

    buffer.push_back(magicNumber >> 8);

    buffer.push_back(magicNumber);

    buffer.push_back(version >> 8);

    buffer.push_back(version);

    buffer.push_back(flags >> 8);

    buffer.push_back(flags);

    buffer.push_back(headerSize >> 24);

    buffer.push_back(headerSize >> 16);

    buffer.push_back(headerSize >> 8);

    buffer.push_back(headerSize);

    return buffer;

}

TEST(FormatUtilsTest, TestDetectFormatVersion) {

    EXPECT_EQ(FormatUtils::UNKNOWN_VERSION,

            FormatUtils::detectFormatVersion(ReadOnlyByteArrayView()));

    {

        const std::vector<uint8_t> buffer =

                getBuffer(FormatUtils::MAGIC_NUMBER, FormatUtils::VERSION_2, 0, 0);

        EXPECT_EQ(FormatUtils::VERSION_2, FormatUtils::detectFormatVersion(

                ReadOnlyByteArrayView(buffer.data(), buffer.size())));

    }

    {

        const std::vector<uint8_t> buffer =

                getBuffer(FormatUtils::MAGIC_NUMBER, FormatUtils::VERSION_4, 0, 0);

        EXPECT_EQ(FormatUtils::VERSION_4, FormatUtils::detectFormatVersion(

                ReadOnlyByteArrayView(buffer.data(), buffer.size())));

    }

    {

        const std::vector<uint8_t> buffer =

                getBuffer(FormatUtils::MAGIC_NUMBER, FormatUtils::VERSION_4_DEV, 0, 0);

        EXPECT_EQ(FormatUtils::VERSION_4_DEV, FormatUtils::detectFormatVersion(

                ReadOnlyByteArrayView(buffer.data(), buffer.size())));

    }

    {

        const std::vector<uint8_t> buffer =

                getBuffer(FormatUtils::MAGIC_NUMBER - 1, FormatUtils::VERSION_2, 0, 0);

        EXPECT_EQ(FormatUtils::UNKNOWN_VERSION, FormatUtils::detectFormatVersion(

                ReadOnlyByteArrayView(buffer.data(), buffer.size())));

    }

    {

        const std::vector<uint8_t> buffer =

                getBuffer(FormatUtils::MAGIC_NUMBER, 100, 0, 0);

        EXPECT_EQ(FormatUtils::UNKNOWN_VERSION, FormatUtils::detectFormatVersion(

                ReadOnlyByteArrayView(buffer.data(), buffer.size())));

    }

    {

        const std::vector<uint8_t> buffer =

                getBuffer(FormatUtils::MAGIC_NUMBER, FormatUtils::VERSION_2, 0, 0);

        EXPECT_EQ(FormatUtils::UNKNOWN_VERSION, FormatUtils::detectFormatVersion(

                ReadOnlyByteArrayView(buffer.data(), buffer.size() - 1)));

    }

}

}  // namespace

}  // namespace latinime