private static string TextifyBytes(Text t)
{
BytesWritable b = new BytesWritable();
b.Set(t.GetBytes(), 0, t.GetLength());
return(b.ToString());
}
public virtual void TestZeroCopy()
{
byte[] bytes = GetBytesForString("brock");
BytesWritable zeroBuf = new BytesWritable(bytes, bytes.Length);
// new
BytesWritable copyBuf = new BytesWritable(bytes);
// old
// using zero copy constructor shouldn't result in a copy
Assert.True(bytes == zeroBuf.Bytes, "copy took place, backing array != array passed to constructor");
Assert.True(zeroBuf.Length == bytes.Length, "length of BW should backing byte array");
Assert.Equal(zeroBuf, copyBuf, "objects with same backing array should be equal");
Assert.Equal(zeroBuf.ToString(), copyBuf.ToString(),
"string repr of objects with same backing array should be equal");
Assert.True(zeroBuf.CompareTo(copyBuf) == 0, "compare order objects with same backing array should be equal");
Assert.True(zeroBuf.GetHashCode() == copyBuf.GetHashCode(),
"hash of objects with same backing array should be equal");
// ensure expanding buffer is handled correctly
// for buffers created with zero copy api
byte[] buffer = new byte[bytes.Length * 5];
zeroBuf.Set(buffer, 0, buffer.Length);
// expand internal buffer
zeroBuf.Set(bytes, 0, bytes.Length);
// set back to normal contents
Assert.Equal(zeroBuf, copyBuf, "buffer created with (array, len) has bad contents");
Assert.True(zeroBuf.Length == copyBuf.Length, "buffer created with (array, len) has bad length");
}