flatfile_tests.cpp

// Copyright (c) 2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <flatfile.h>
#include <test/test_raptoreum.h>

#include <boost/test/unit_test.hpp>

BOOST_FIXTURE_TEST_SUITE(flatfile_tests, BasicTestingSetup
)

BOOST_AUTO_TEST_CASE(flatfile_filename)
        {
                auto data_dir = SetDataDir("flatfile_test");

        FlatFilePos pos(456, 789);

        FlatFileSeq seq1(data_dir, "a", 16 * 1024);
        BOOST_CHECK_EQUAL(seq1.FileName(pos), data_dir / "a00456.dat");

        FlatFileSeq seq2(data_dir / "a", "b", 16 * 1024);
        BOOST_CHECK_EQUAL(seq2.FileName(pos), data_dir / "a" / "b00456.dat");
        }

BOOST_AUTO_TEST_CASE(flatfile_open)
        {
                auto data_dir = SetDataDir("flatfile_test");
        FlatFileSeq seq(data_dir, "a", 16 * 1024);

        std::string line1("A purely peer-to-peer version of electronic cash would allow online "
        "payments to be sent directly from one party to another without going "
        "through a financial institution.");
        std::string line2("Digital signatures provide part of the solution, but the main benefits are "
        "lost if a trusted third party is still required to prevent double-spending.");

        size_t pos1 = 0;
        size_t pos2 = pos1 + GetSerializeSize(line1, CLIENT_VERSION);

        // Write first line to file.
        {
            CAutoFile file(seq.Open(FlatFilePos(0, pos1)), SER_DISK, CLIENT_VERSION);
            file << LIMITED_STRING(line1, 256);
        }

        // Attempt to append to file opened in read-only mode.
        {
            CAutoFile file(seq.Open(FlatFilePos(0, pos2), true), SER_DISK, CLIENT_VERSION);
            BOOST_CHECK_THROW(file << LIMITED_STRING(line2, 256), std::ios_base::failure);
        }

        // Append second line to file.
        {
            CAutoFile file(seq.Open(FlatFilePos(0, pos2)), SER_DISK, CLIENT_VERSION);
            file << LIMITED_STRING(line2, 256);
        }

        // Read text from file in read-only mode.
        {
            std::string text;
            CAutoFile file(seq.Open(FlatFilePos(0, pos1), true), SER_DISK, CLIENT_VERSION);

            file >> LIMITED_STRING(text, 256);
            BOOST_CHECK_EQUAL(text, line1);

            file >> LIMITED_STRING(text, 256);
            BOOST_CHECK_EQUAL(text, line2);
        }

        // Read text from file with position offset.
        {
            std::string text;
            CAutoFile file(seq.Open(FlatFilePos(0, pos2)), SER_DISK, CLIENT_VERSION);

            file >> LIMITED_STRING(text, 256);
            BOOST_CHECK_EQUAL(text, line2);
        }

        // Ensure another file in the sequence has no data.
        {
            std::string text;
            CAutoFile file(seq.Open(FlatFilePos(1, pos2)), SER_DISK, CLIENT_VERSION);
            BOOST_CHECK_THROW(file >> LIMITED_STRING(text, 256), std::ios_base::failure);
        }
        }

BOOST_AUTO_TEST_CASE(flatfile_allocate)
        {
                auto data_dir = SetDataDir("flatfile_test");
        FlatFileSeq seq(data_dir, "a", 100);

        bool out_of_space;

        BOOST_CHECK_EQUAL(seq.Allocate(FlatFilePos(0, 0), 1, out_of_space), 100);
        BOOST_CHECK_EQUAL(fs::file_size(seq.FileName(FlatFilePos(0, 0))), 100);
        BOOST_CHECK(!out_of_space);

        BOOST_CHECK_EQUAL(seq.Allocate(FlatFilePos(0, 99), 1, out_of_space), 0);
        BOOST_CHECK_EQUAL(fs::file_size(seq.FileName(FlatFilePos(0, 99))), 100);
        BOOST_CHECK(!out_of_space);

        BOOST_CHECK_EQUAL(seq.Allocate(FlatFilePos(0, 99), 2, out_of_space), 101);
        BOOST_CHECK_EQUAL(fs::file_size(seq.FileName(FlatFilePos(0, 99))), 200);
        BOOST_CHECK(!out_of_space);
        }

BOOST_AUTO_TEST_CASE(flatfile_flush)
        {
                auto data_dir = SetDataDir("flatfile_test");
        FlatFileSeq seq(data_dir, "a", 100);

        bool out_of_space;
        seq.Allocate(FlatFilePos(0, 0), 1, out_of_space);

        // Flush without finalize should not truncate file.
        seq.Flush(FlatFilePos(0, 1));
        BOOST_CHECK_EQUAL(fs::file_size(seq.FileName(FlatFilePos(0, 1))), 100);

        // Flush with finalize should truncate file.
        seq.Flush(FlatFilePos(0, 1), true);
        BOOST_CHECK_EQUAL(fs::file_size(seq.FileName(FlatFilePos(0, 1))), 1);
        }

BOOST_AUTO_TEST_SUITE_END()