@Test
public void clear() {

    db.run(tr -> {
        tr.set(rsSubspace.pack(new byte[]{(byte)0xde, (byte)0xad}), new byte[]{(byte)0xc0, (byte)0xde});
        return null;
    });
    assertTrue(db.readAsync(tr -> tr.getRange(rsSubspace.range()).asList()).join().size() == 1, "Key does not appear to be added");
    rs.clear(db).join();
    assertTrue(db.readAsync(tr -> tr.getRange(rsSubspace.range()).asList()).join().isEmpty(), "Clear did not remove key");
}