Help with DMLOptions Not Triggering Case Assignment Rules on Before Trigger

public class Case_RunAssignmentRule {
	public static void runCaseAssignmentRules(List<Case> caseList) {
		List<Case> caseToUpdate = new List<Case> ();
		Id caseInboundRecordType = Schema.SObjectType.Case.getRecordTypeInfosByName().get('Inbound Case').getRecordTypeId();
		for (Case c : caseList) {
			if (c.RecordTypeId == caseInboundRecordType) {
				caseToUpdate.add(c);
				System.debug('CaseID --> ' + caseToUpdate);
			}
		}
		if (caseToUpdate.size() > 0) {
			//List<Case> caseToRunAssignment = [SELECT Id, OwnerId FROM Case WHERE Id IN :caseToUpdate];
			Database.DMLOptions dmo = new Database.DMLOptions();
			dmo.assignmentRuleHeader.useDefaultRule = true;
			System.debug('DMO --> ' + dmo);
			for (Case caseL : caseToUpdate) {
				caseL.setOptions(dmo);
				System.debug('caseOwner --> ' + caseL.OwnerId);
				System.debug('caseId --> ' + caseL);
			}
			//insert caseToUpdate;
		}
	}
}

@isTest
public class Case_RunAssignmentRuleTest {
	@testSetup static void setupTest() {
		List<TriggerController__c> tc = new List<TriggerController__c> {
			new TriggerController__c(Name = 'Case', Disabled__c = false)
		};
	}
	static testmethod void newCaseInsert() {
		List<Case> newCases = new List<Case> ();
		for (Integer i = 0; i<5; i++) {
			Case c = new Case();
			c.Subject = 'InboundCaseForCAR' + i;
			c.Product__c = 'G2M';
			c.Reason_Category__c = 'Admin Change';
			c.Case_Category__c = 'Contract Services';
			c.Status = 'New';
            c.RecordTypeId = '01213000001ZUeG'; 
			newCases.add(c);
		}
		test.startTest();
		insert(newCases);
		Id currentUserId = UserInfo.getUserId();
		List<Case> returnCaseList = [SELECT Id, OwnerId, Subject FROM Case WHERE Id IN :newCases];
		for (Case c : returnCaseList) {
			System.assertNotEquals(currentUserId, c.OwnerId);
			System.assertEquals(5, returnCaseList.size());
		}
		test.stopTest();
	}
}