@Test
public void testZTXTChunksAreFilteredOut() throws Exception {

	InputStream inputStream = _createInputStream(
		_PNG_SIGNATURE, _ZTXT_CHUNK);
	byte[] bytes = new byte[_PNG_SIGNATURE.length];
	inputStream.read(bytes);
	Assert.assertArrayEquals(_PNG_SIGNATURE, bytes);
	Assert.assertEquals(-1, inputStream.read());
}