private void check(String options, Text l1, Text l2, int c) throws IOException {
JobConf conf = new JobConf();
conf.setKeyFieldComparatorOptions(options);
KeyFieldBasedComparator comp = new KeyFieldBasedComparator();
comp.configure(conf);
DataOutputBuffer out1 = serialize(l1);
DataOutputBuffer out2 = serialize(l2);
assertThat(options, comp.compare(out1.getData(), 0, out1.getLength(), out2.getData(), 0, out2.getLength()), is(c));
}