assertThat(b1.count()).isEqualTo(0);
b2.put("a".getBytes("US-ASCII"), "va".getBytes("US-ASCII"));
WriteBatchInternal.append(b1, b2);
assertThat("Put(a, va)@200".equals(new String(getContents(b1), "US-ASCII")));
assertThat(b1.count()).isEqualTo(1);
b2.clear();
b2.put("b".getBytes("US-ASCII"), "vb".getBytes("US-ASCII"));
WriteBatchInternal.append(b1, b2);
assertThat(("Put(a, va)@200" +
"Put(b, vb)@201")
.equals(new String(getContents(b1), "US-ASCII")));