96 lines
2.8 KiB
C#
96 lines
2.8 KiB
C#
using System.IO;
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using System.Text;
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using SharpCompress.Compressors.Xz;
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using Xunit;
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namespace SharpCompress.Test.Xz;
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public class XZBlockTests : XZTestsBase
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{
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protected override void Rewind(Stream stream) => stream.Position = 12;
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protected override void RewindIndexed(Stream stream) => stream.Position = 12;
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private byte[] ReadBytes(XZBlock block, int bytesToRead)
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{
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var buffer = new byte[bytesToRead];
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var read = block.Read(buffer, 0, bytesToRead);
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if (read != bytesToRead)
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{
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throw new EndOfStreamException();
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}
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return buffer;
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}
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[Fact]
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public void OnFindIndexBlockThrow()
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{
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var bytes = new byte[] { 0 };
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using Stream indexBlockStream = new MemoryStream(bytes);
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var XZBlock = new XZBlock(indexBlockStream, CheckType.CRC64, 8);
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Assert.Throws<XZIndexMarkerReachedException>(() =>
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{
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ReadBytes(XZBlock, 1);
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});
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}
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[Fact]
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public void CrcIncorrectThrows()
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{
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var bytes = (byte[])Compressed.Clone();
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bytes[20]++;
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using Stream badCrcStream = new MemoryStream(bytes);
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Rewind(badCrcStream);
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var XZBlock = new XZBlock(badCrcStream, CheckType.CRC64, 8);
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var ex = Assert.Throws<InvalidDataException>(() =>
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{
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ReadBytes(XZBlock, 1);
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});
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Assert.Equal("Block header corrupt", ex.Message);
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}
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[Fact]
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public void CanReadM()
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{
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var XZBlock = new XZBlock(CompressedStream, CheckType.CRC64, 8);
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Assert.Equal(Encoding.ASCII.GetBytes("M"), ReadBytes(XZBlock, 1));
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}
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[Fact]
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public void CanReadMary()
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{
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var XZBlock = new XZBlock(CompressedStream, CheckType.CRC64, 8);
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Assert.Equal(Encoding.ASCII.GetBytes("M"), ReadBytes(XZBlock, 1));
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Assert.Equal(Encoding.ASCII.GetBytes("a"), ReadBytes(XZBlock, 1));
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Assert.Equal(Encoding.ASCII.GetBytes("ry"), ReadBytes(XZBlock, 2));
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}
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[Fact]
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public void CanReadPoemWithStreamReader()
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{
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var XZBlock = new XZBlock(CompressedStream, CheckType.CRC64, 8);
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var sr = new StreamReader(XZBlock);
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Assert.Equal(sr.ReadToEnd(), Original);
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}
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[Fact]
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public void NoopWhenNoPadding()
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{
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// CompressedStream's only block has no padding.
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var XZBlock = new XZBlock(CompressedStream, CheckType.CRC64, 8);
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var sr = new StreamReader(XZBlock);
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sr.ReadToEnd();
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Assert.Equal(0L, CompressedStream.Position % 4L);
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}
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[Fact]
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public void SkipsPaddingWhenPresent()
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{
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// CompressedIndexedStream's first block has 1-byte padding.
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var XZBlock = new XZBlock(CompressedIndexedStream, CheckType.CRC64, 8);
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var sr = new StreamReader(XZBlock);
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sr.ReadToEnd();
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Assert.Equal(0L, CompressedIndexedStream.Position % 4L);
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}
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}
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