new Pack200CompressorInputStream(new FileInputStream(getFile("bla.jar")),
m);
try {
// packed file is a jar, which is a zip so it starts with
// a local file header
assertTrue(is.markSupported());
is.mark(5);
assertEquals(0x50, is.read());
byte[] rest = new byte[3];
assertEquals(3, is.read(rest));
assertEquals(0x4b, rest[0]);