public void BadData_FromFile_ThrowsInvalidDataException(string filename)
{
using var resource =
typeof(SnappyTests).Assembly.GetManifestResourceStream($"Snappier.Tests.TestData.{filename}");
Assert.NotNull(resource);
var input = new byte[resource.Length];
resource.Read(input);
Assert.Throws <InvalidDataException>(() =>
{
var length = Snappy.GetUncompressedLength(input);
Assert.InRange(length, 0, 1 << 20);
var output = new byte[length];
Snappy.Decompress(input, output);
});
}
public void BadData_SimpleCorruption_ThrowsInvalidDataException()
{
var input = Encoding.UTF8.GetBytes("making sure we don't crash with corrupted input");
var compressed = new byte[Snappy.GetMaxCompressedLength(input.Length)];
var compressedLength = Snappy.Compress(input, compressed);
var compressedSpan = compressed.AsSpan(0, compressedLength);
// corrupt the data a bit
compressedSpan[1]--;
compressedSpan[3]++;
Assert.Throws <InvalidDataException>(() =>
{
var length = Snappy.GetUncompressedLength(compressed.AsSpan(0, compressedLength));
Assert.InRange(length, 0, 1 << 20);
var output = new byte[length];
Snappy.Decompress(compressed.AsSpan(0, compressedLength), output);
});
}
public void CompressAndDecompressFile(string filename)
{
using var resource =
typeof(SnappyTests).Assembly.GetManifestResourceStream($"Snappier.Tests.TestData.{filename}");
Assert.NotNull(resource);
var input = new byte[resource.Length];
resource.Read(input);
var compressed = new byte[Snappy.GetMaxCompressedLength(input.Length)];
var compressedLength = Snappy.Compress(input, compressed);
var compressedSpan = compressed.AsSpan(0, compressedLength);
var output = new byte[Snappy.GetUncompressedLength(compressedSpan)];
var outputLength = Snappy.Decompress(compressedSpan, output);
Assert.Equal(input.Length, outputLength);
Assert.Equal(input, output);
}