std.zlib.Compress / UnCompress are not working

[Lionello Lunesu]

I can't get the Compress and UnCompress classes in std.zlib to work. 
I've checked the source and noticed they have no unittest.

Should the following code work? If so, please add it to the std.zlib in 
a unittest {...}..

import std.zlib;

void main()
{
	Compress cmp = new Compress;
	UnCompress decmp = new UnCompress;

	void[] input;
	input = "tesatdffadf";

	void[] buf = cmp.compress(input);
	buf ~= cmp.flush();
	void[] output = decmp.uncompress(buf);

	assert( output[] == input[] );
}

L.