@Test
public void testValidateAssertMissingDataSet()
{

    DhisConvenienceTest.assertIllegalQueryEx( exception, ErrorCode.E2013 );
    ExportParams params = new ExportParams()
        .setOrganisationUnits( Sets.newHashSet( new OrganisationUnit() ) )
        .setPeriods( Sets.newHashSet( new Period() ) );
    subject.validate( params );
}