@Test
public void testAdapt_EmptyBinary() throws IOException {

  // What does BigTable do in this case?
  BinaryComparator comparator = new BinaryComparator(new byte[0]);
  org.apache.hadoop.hbase.filter.RowFilter filter =
      new org.apache.hadoop.hbase.filter.RowFilter(CompareFilter.CompareOp.EQUAL, comparator);
  Assert.assertEquals(
      FILTERS.key().regex(ByteString.copyFrom(new byte[0])).toProto(),
      adapter.adapt(context, filter).toProto());
}