private void removeStudy(Object study, QueryOptions options) throws Exception {
variantManager.removeStudy(study.toString(), sessionId, new QueryOptions());
Query query = new Query(FileDBAdaptor.QueryParams.INDEX_STATUS_NAME.key(), FileIndex.IndexStatus.READY);
assertEquals(0L, catalogManager.getFileManager().count(study.toString(), query, sessionId).getNumTotalResults());
Cohort all = catalogManager.getCohortManager().get(studyId,
new Query(CohortDBAdaptor.QueryParams.ID.key(), StudyEntry.DEFAULT_COHORT), null, sessionId).first();
assertTrue(all.getSamples().isEmpty());
}