query.taskOwner(testString);
query.taskOwnerExpression(testString);
query.taskUnassigned();
query.taskDelegationState(testDelegationState);
query.taskCandidateGroupIn(testCandidateGroups);
query.taskCandidateGroupInExpression(testString);
query.processInstanceId(testString);
query.executionId(testString);
query.activityInstanceIdIn(testActivityInstances);
query.taskCreatedOn(testDate);
query.taskCreatedOnExpression(testString);