Salesforce 如何在下节课中涵盖多个if语句。我试过几次，但测试覆盖率没有超过67%

在下面的代码/在这一部分中，我面临着问题/我无法设置else条件。有人能告诉我怎么做吗？我是销售部的新手。请帮帮我

public class SaaSFocus_Distribute_appointment 
{

public List<Broker__c>Broker_special_lst;
public list<AggregateResult> counter_list;
public list<AggregateResult> counter_list1;
public list<Counter__c> clist;

/*Method which takes broker list through parameter and distributes appointment to 
desire brokers and increase/decrease counters*/

public ID Compensatory_appointment(set<ID> Broker_ID)
{

//list which sorts parametrs list order by compensatory Appointment
Broker_special_lst=[select id, Compensatory_Appointment__c from Broker__c where id in:Broker_ID order by Compensatory_Appointment__c desc ];

ID Allocatedbrokerid ;

if(Broker_special_lst[0].Compensatory_Appointment__c>0)  /*Here we are checking the compensatory appointement  greater than zero*/

{
Allocatedbrokerid  = Broker_special_lst[0].id;
Broker_special_lst[0].Compensatory_Appointment__c--;
update Broker_special_lst[0];

System.debug('before if COmpen VT Bingo;;;;;'+Broker_special_lst[0].Compensatory_Appointment__c);
}
else       //if compenstory appointment have null value it assigns zero 
{   
if(Broker_special_lst[0].Compensatory_Appointment__c==null)
Broker_special_lst[0].Compensatory_Appointment__c=0;
System.debug('else COmpen VT Bingo;;;;;'+Broker_special_lst[0].Compensatory_Appointment__c);

list<Market_Broker_Association__c> masterbrkerlist=[select id, Priority__c, Broker__r.id from Market_Broker_Association__c where Broker__c in :Broker_ID];

Map<String, set<id>> map_Broker = new Map<String, set<id>>();

for(Market_Broker_Association__c mba:masterbrkerlist)  //here is the map where map key has priority__c and value have set of id's.
{                  
if(map_Broker.get(mba.Priority__c) == null)    // if map's Priority__c comes null than map put method works.
map_Broker.put(mba.Priority__c,new set<id>());
map_Broker.get(mba.Priority__c).add(mba.Broker__r.id );
}

system.debug('PM***'+map_Broker.get('Primary Market'));
system.debug('SM***'+map_Broker.get('Secondary Market'));

if(map_Broker.get('Primary Market')==null) 
{
clist=[select Count__c,Broker__c  from Counter__c where Broker__c in:map_Broker.get('Secondary Market') order by Count__c desc];
}
else if(map_Broker.get('Secondary Market')==null)
{

clist=  [select Count__c,Broker__c from Counter__c where Broker__c in:map_Broker.get('Primary Market') order by Count__c desc];
}
else
{
/*Here we are execuitng aggregate query for counter object*/

counter_list=[select min (Count__c)cnt from Counter__c where Broker__c in :map_Broker.get('Primary Market')];

counter_list1=[select max(Count__c)cnt1 from Counter__c where Broker__c in :map_Broker.get('Secondary Market')];
Decimal intdata = 0;
Decimal intdata1 = 0;
Decimal num = 0;
intdata =(Decimal)counter_list[0].get('cnt');
intdata1 =(Decimal)counter_list1[0].get('cnt1');

//This is the custom setting where secondary appointment lag field set default as a constant

Google_API_Setting__c obj_Lag=[select Secondary_Appointment_Lag__c from Google_API_Setting__c ];

num = intdata - intdata1 ;
if(num>obj_Lag.Secondary_Appointment_Lag__c)
{
clist=[select Count__c,Broker__c  from Counter__c where Broker__c  in:map_Broker.get('Secondary Market') order by Count__c desc];  

}
else
{
clist=[select Count__c ,Broker__c from Counter__c where Broker__c in:map_Broker.get('Primary Market') order by Count__c desc];
}
} 

Allocatedbrokerid  = clist[0].broker__c;
clist[0].count__c ++;
update clist[0];

update Broker_special_lst[0];
}
return Allocatedbrokerid ; 

}
}