@Test
public void testColumnRangeFilterWithASingleFamily_openEnd() throws IOException {

  ColumnRangeFilter filter = new ColumnRangeFilter(Bytes.toBytes("a"), true, null, false);
  Scan familyScan = new Scan().addFamily(Bytes.toBytes("foo"));
  Filters.Filter expectedFilter =
      filterAdapter.adapt(new FilterAdapterContext(familyScan, null), filter);
  ColumnRange columnRange = expectedFilter.toProto().getColumnRangeFilter();
  Assert.assertEquals("a", toString(columnRange.getStartQualifierClosed()));
  Assert.assertEquals(0, columnRange.getStartQualifierOpen().size());
  Assert.assertEquals(0, columnRange.getEndQualifierOpen().size());
  Assert.assertEquals(0, columnRange.getEndQualifierClosed().size());
}