public static ByteBuf buffer() {
        return ALLOC.heapBuffer();
    }
@Test
    public void skipBytesNegativeLength() {
        final ByteBuf buf = buffer(8);
        try {
            assertThrows(IllegalArgumentException.class, new Executable() {
                @Override
                public void execute() throws Throwable {
                    buf.skipBytes(-1);
                }
            });
        } finally {
            buf.release();
        }
    }