assertEquals(writable.get(key1), value);
assertNull(writable.get(key2));
DataOutputBuffer dob = new DataOutputBuffer();
writable.write(dob);
writable.clear();
writable.put(key1, value);
writable.put(key2, value);
assertEquals(writable.get(key1), value);
assertEquals(writable.get(key2), value);