text: /*
   * Copyright (c) 2020-2021, the SegueBaseOS developers.
   *
   * SPDX-License-Identifier: BSD-2-Clause
   */
  
  #include <LibTest/TestCase.h>
  
  #include <AK/Array.h>
  #include <AK/Random.h>
  #include <LibCompress/Gzip.h>
  
  TEST_CASE(gzip_decompress_simple)
  {
      const Array<u8, 33> compressed {
          0x1f, 0x8b, 0x08, 0x00, 0x77, 0xff, 0x47, 0x5f, 0x02, 0xff, 0x2b, 0xcf,
          0x2f, 0x4a, 0x31, 0x54, 0x48, 0x4c, 0x4a, 0x56, 0x28, 0x07, 0xb2, 0x8c,
          0x00, 0xc2, 0x1d, 0x22, 0x15, 0x0f, 0x00, 0x00, 0x00
      };
  
      const u8 uncompressed[] = "word1 abc word2";
  
      const auto decompressed = Compress::GzipDecompressor::decompress_all(compressed);
      EXPECT(decompressed.value().bytes() == (ReadonlyBytes { uncompressed, sizeof(uncompressed) - 1 }));
  }
  
  TEST_CASE(gzip_decompress_multiple_members)
  {
      const Array<u8, 52> compressed {
          0x1f, 0x8b, 0x08, 0x00, 0xe0, 0x03, 0x48, 0x5f, 0x02, 0xff, 0x4b, 0x4c,
          0x4a, 0x4e, 0x4c, 0x4a, 0x06, 0x00, 0x4c, 0x99, 0x6e, 0x72, 0x06, 0x00,
          0x00, 0x00, 0x1f, 0x8b, 0x08, 0x00, 0xe0, 0x03, 0x48, 0x5f, 0x02, 0xff,
          0x4b, 0x4c, 0x4a, 0x4e, 0x4c, 0x4a, 0x06, 0x00, 0x4c, 0x99, 0x6e, 0x72,
          0x06, 0x00, 0x00, 0x00
      };
  
      const u8 uncompressed[] = "abcabcabcabc";
  
      const auto decompressed = Compress::GzipDecompressor::decompress_all(compressed);
      EXPECT(decompressed.value().bytes() == (ReadonlyBytes { uncompressed, sizeof(uncompressed) - 1 }));
  }
  
  TEST_CASE(gzip_decompress_zeroes)
  {
      const Array<u8, 161> compressed {
          0x1f, 0x8b, 0x08, 0x00, 0x6e, 0x7a, 0x4b, 0x5f, 0x02, 0xff, 0xed, 0xc1,
          0x31, 0x01, 0x00, 0x00, 0x00, 0xc2, 0xa0, 0xf5, 0x4f, 0xed, 0x61, 0x0d,
          0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6e, 0xcd, 0xcd, 0xe8,
          0x7e, 0x00, 0x00, 0x02, 0x00
      };
  
      const Array<u8, 128 * 1024> uncompressed = { 0 };
  
      const auto decompressed = Compress::GzipDecompressor::decompress_all(compressed);
      EXPECT(uncompressed == decompressed.value().bytes());
  }
  
  TEST_CASE(gzip_decompress_repeat_around_buffer)
  {
      const Array<u8, 70> compressed {
          0x1f, 0x8b, 0x08, 0x00, 0xc6, 0x74, 0x53, 0x5f, 0x02, 0xff, 0xed, 0xc1,
          0x01, 0x0d, 0x00, 0x00, 0x0c, 0x02, 0xa0, 0xdb, 0xbf, 0xf4, 0x37, 0x6b,
          0x08, 0x24, 0xdb, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xca,
          0xb8, 0x07, 0xcd, 0xe5, 0x38, 0xfa, 0x00, 0x80, 0x00, 0x00
      };
  
      Array<u8, 0x8000> uncompressed;
      uncompressed.span().slice(0x0000, 0x0100).fill(1);
      uncompressed.span().slice(0x0100, 0x7e00).fill(0);
      uncompressed.span().slice(0x7f00, 0x0100).fill(1);
  
      const auto decompressed = Compress::GzipDecompressor::decompress_all(compressed);
      EXPECT(uncompressed == decompressed.value().bytes());
  }
  
  TEST_CASE(gzip_round_trip)
  {
      auto original = ByteBuffer::create_uninitialized(1024);
      fill_with_random(original.data(), 1024);
      auto compressed = Compress::GzipCompressor::compress_all(original);
      EXPECT(compressed.has_value());
      auto uncompressed = Compress::GzipDecompressor::decompress_all(compressed.value());
      EXPECT(uncompressed.has_value());
      EXPECT(uncompressed.value() == original);
  }
  