public void ChecksMagicNumber()
{
var bytes = Compressed.Clone() as byte[];
bytes[3]++;
using (Stream badMagicNumberStream = new MemoryStream(bytes))
{
BinaryReader br = new BinaryReader(badMagicNumberStream);
var header = new XZHeader(br);
var ex = Assert.Throws <InvalidDataException>(() => { header.Process(); });
Assert.Equal("Invalid XZ Stream", ex.Message);
}
}
public void CorruptHeaderThrows()
{
var bytes = Compressed.Clone() as byte[];
bytes[8]++;
using (Stream badCrcStream = new MemoryStream(bytes))
{
BinaryReader br = new BinaryReader(badCrcStream);
var header = new XZHeader(br);
var ex = Assert.Throws <InvalidDataException>(() => { header.Process(); });
Assert.Equal("Stream header corrupt", ex.Message);
}
}
public void CrcIncorrectThrows()
{
var bytes = Compressed.Clone() as byte[];
bytes[20]++;
using (Stream badCrcStream = new MemoryStream(bytes))
{
Rewind(badCrcStream);
var XZBlock = new XZBlock(badCrcStream, CheckType.CRC64, 8);
var ex = Assert.Throws <InvalidDataException>(() => { ReadBytes(XZBlock, 1); });
Assert.Equal("Block header corrupt", ex.Message);
}
}
public void BadVersionIfCrcOkButStreamFlagUnknown()
{
var bytes = Compressed.Clone() as byte[];
byte[] streamFlags = { 0x00, 0xF4 };
byte[] crc = Crc32.Compute(streamFlags).ToLittleEndianBytes();
streamFlags.CopyTo(bytes, 6);
crc.CopyTo(bytes, 8);
using (Stream badFlagStream = new MemoryStream(bytes))
{
BinaryReader br = new BinaryReader(badFlagStream);
var header = new XZHeader(br);
var ex = Assert.Throws <InvalidDataException>(() => { header.Process(); });
Assert.Equal("Unknown XZ Stream Version", ex.Message);
}
}
