Function TEST

source/MRTest/MRZlibTests.cpp:136–172

) );

TEST( MRMesh, ZlibCompressStats )
{
    const std::string inputStr( reinterpret_cast<const char*>( cInput ), sizeof( cInput ) );
    const uint32_t expectedCrc = crc32Ref( cInput, sizeof( cInput ) );

    struct Case { bool rawDeflate; int level; };
    const Case cases[] = {
        { true,  1 },
        { true,  9 },
        { false, 1 },
        { false, 9 },
    };

    for ( const auto& c : cases )
    {
        MR::ZlibCompressStats stats;
        std::istringstream in( inputStr );
        std::ostringstream out;
        auto res = MR::zlibCompressStream( in, out,
            MR::ZlibCompressParams{ { .rawDeflate = c.rawDeflate }, c.level, &stats } );
        EXPECT_TRUE( res.has_value() );

        // Engine-agnostic assertions: CRC and uncompressed size are defined by
        // the input; stats.compressedSize must equal out.str().size() (API
        // consistency); compressed output must be non-empty and smaller than
        // the input. We deliberately do NOT pin stats.compressedSize to the
        // size of cRawLevel*/cWrappedLevel* -- those reference blobs were
        // captured from stock zlib, and the exact compressed byte count drifts
        // from one deflate implementation to another (stock zlib vs zlib-ng
        // compat vs zlib-ng native vs libdeflate, all lossless).
        EXPECT_EQ( stats.crc32, expectedCrc );
        EXPECT_EQ( stats.uncompressedSize, sizeof( cInput ) );
        EXPECT_EQ( stats.compressedSize, out.str().size() );
        EXPECT_GT( stats.compressedSize, 0u );
        EXPECT_LT( stats.compressedSize, sizeof( cInput ) );
    }
}

TEST( MRMesh, ZlibCompressStatsEmpty )
{