getTaskConfig().setDriverStrategy(DriverStrategy.CO_GROUP);
final CoGroupDriver<Record, Record, Record> testTask = new CoGroupDriver<Record, Record, Record>();
try {
addInputSorted(new UniformRecordGenerator(keyCnt1, valCnt1, false), this.comparator1.duplicate());
addInputSorted(new UniformRecordGenerator(keyCnt2, valCnt2, false), this.comparator2.duplicate());
testDriver(testTask, MockCoGroupStub.class);
} catch (Exception e) {
e.printStackTrace();
Assert.fail("The test caused an exception.");
}