/* * Copyright (c) 2020, the SerenityOS developers. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * 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. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include bool compare(ReadonlyBytes lhs, ReadonlyBytes rhs) { if (lhs.size() != rhs.size()) return false; for (size_t idx = 0; idx < lhs.size(); ++idx) { if (lhs[idx] != rhs[idx]) return false; } return true; } TEST_CASE(deflate_decompress_compressed_block) { const u8 compressed[] = { 0x0B, 0xC9, 0xC8, 0x2C, 0x56, 0x00, 0xA2, 0x44, 0x85, 0xE2, 0xCC, 0xDC, 0x82, 0x9C, 0x54, 0x85, 0x92, 0xD4, 0x8A, 0x12, 0x85, 0xB4, 0x4C, 0x20, 0xCB, 0x4A, 0x13, 0x00 }; const u8 uncompressed[] = "This is a simple text file :)"; const auto decompressed = Compress::DeflateDecompressor::decompress_all({ compressed, sizeof(compressed) }); EXPECT(compare({ uncompressed, sizeof(uncompressed) - 1 }, decompressed.bytes())); } TEST_CASE(deflate_decompress_uncompressed_block) { const u8 compressed[] = { 0x01, 0x0d, 0x00, 0xf2, 0xff, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x2c, 0x20, 0x57, 0x6f, 0x72, 0x6c, 0x64, 0x21 }; const u8 uncompressed[] = "Hello, World!"; const auto decompressed = Compress::DeflateDecompressor::decompress_all({ compressed, sizeof(compressed) }); EXPECT(compare({ uncompressed, sizeof(uncompressed) - 1 }, decompressed.bytes())); } TEST_CASE(deflate_decompress_multiple_blocks) { const u8 compressed[] = { 0x00, 0x1f, 0x00, 0xe0, 0xff, 0x54, 0x68, 0x65, 0x20, 0x66, 0x69, 0x72, 0x73, 0x74, 0x20, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x20, 0x69, 0x73, 0x20, 0x75, 0x6e, 0x63, 0x6f, 0x6d, 0x70, 0x72, 0x65, 0x73, 0x73, 0x65, 0x64, 0x53, 0x48, 0xcc, 0x4b, 0x51, 0x28, 0xc9, 0x48, 0x55, 0x28, 0x4e, 0x4d, 0xce, 0x07, 0x32, 0x93, 0x72, 0xf2, 0x93, 0xb3, 0x15, 0x32, 0x8b, 0x15, 0x92, 0xf3, 0x73, 0x0b, 0x8a, 0x52, 0x8b, 0x8b, 0x53, 0x53, 0xf4, 0x00 }; const u8 uncompressed[] = "The first block is uncompressed and the second block is compressed."; const auto decompressed = Compress::DeflateDecompressor::decompress_all({ compressed, sizeof(compressed) }); EXPECT(compare({ uncompressed, sizeof(uncompressed) - 1 }, decompressed.bytes())); } // FIXME: The following test uses a dynamic encoding which isn't supported by DeflateDecompressor yet. /* TEST_CASE(deflate_decompress_zeroes) { const u8 compressed[] = { 0xed, 0xc1, 0x01, 0x0d, 0x00, 0x00, 0x00, 0xc2, 0xa0, 0xf7, 0x4f, 0x6d, 0x0f, 0x07, 0x14, 0x00, 0x00, 0x00, 0xf0, 0x6e }; u8 uncompressed[4096]; Bytes { uncompressed, sizeof(uncompressed) }.fill(0); const auto decompressed = Compress::DeflateDecompressor::decompress_all({ compressed, sizeof(compressed) }); EXPECT(compare({ uncompressed, sizeof(uncompressed) }, decompressed.bytes())); } */ TEST_CASE(zlib_decompress_simple) { const u8 compressed[] = { 0x78, 0x01, 0x01, 0x1D, 0x00, 0xE2, 0xFF, 0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x61, 0x20, 0x73, 0x69, 0x6D, 0x70, 0x6C, 0x65, 0x20, 0x74, 0x65, 0x78, 0x74, 0x20, 0x66, 0x69, 0x6C, 0x65, 0x20, 0x3A, 0x29, 0x99, 0x5E, 0x09, 0xE8 }; const u8 uncompressed[] = "This is a simple text file :)"; const auto decompressed = Compress::Zlib::decompress_all({ compressed, sizeof(compressed) }); EXPECT(compare({ uncompressed, sizeof(uncompressed) - 1 }, decompressed.bytes())); } TEST_MAIN(Compress)