trigger ContractTrigger on Contract (after update, after insert) {
    Public String[] statut_activated   {set;get;}
    Public String[] statut_waiting   {set;get;}
    Public String[] statut_terminated   {set;get;}
    
    statut_activated = new String[] {'Accepted','Accepted2'};
    statut_waiting = new String[] {'waiting','waiting2'}; 
    statut_terminated = new String[] {'terminated','terminated2'}; 

    
    List<Decimal> listAmount= new List<Decimal>();
    set<Id> AccountIds = new set<Id>();
    for(Contract c : Trigger.new){
    if(c.AccountId != null)
        AccountIds.add(c.AccountId);
    }

  

    Map<String, Contract> cntrMap  = new Map<String, Contract>();
    
    for(Contract contr : [Select Id,contract_stat__c,amount__c From Contract Where AccountId IN: AccountIds]){
        cntrMap.put(contr.Id , contr);
         
         Account acc = [SELECT Id,st__c FROM Account WHERE Id IN: AccountIds];    
        if(contr.amount__c > 0){
            listAmount.add(contr.amount__c);
        }else{
          acc.checked__c=FALSE;
          update acc;
        }
        
       
        if(statut_activated.contains(contr.contract_stat__c)){
             cntrMap.put(contr.contract_stat__c , contr);     
             acc.st__c='customer';   
             update acc;
             break;
            
            /* Contrat En attente*/ 
        }else if(statut_waiting.contains(contr.contract_stat__c)){

             acc.st__c='customer_type2';
             update acc;
             break;
        /*  Contrat En Terminé  */ 
        }else if(statut_terminated.contains(contr.contract_stat__c)){
        
             acc.st__c='customer_type3';
             update acc;
             break;     
        }else{

             acc.st__c='customer_other';
             update acc;       
        }
    }

    for(Decimal l : listAmount){
        if(l > 0){
          Account acc = [SELECT Id,st__c FROM Account WHERE Id IN: AccountIds];    
          acc.checked__c=TRUE;
          update acc;
         }
    }

}

@isTest
public class ContractTrigger {
	@isTest static void myUnitTest() {
        	String pid;
            Integer i=1;
           Test.startTest(); 
           Account acct = new Account(Name='Test Account',Ref_client__c='FFFF1');
       	   insert acct;
            
           List<Contract> cnt = new List<Contract>();
           // for(Integer i=0;i<3;i++) {
                Contract c = new Contract(Name=acct.Name + ' Contract' + i,
                                       StartDate=System.today().addMonths(1),
                                       Status='Draft',
                                       contract_stat__c='waiting',
                                       AccountId=acct.Id);
            	cnt.add(c);
           //}
           insert cnt;
        
       		List<Contract> contra = [Select Id,contract_stat__c,amount__c ,AccountId From Contract Where AccountId = : acct.id];
	        System.assertEquals(1, contra.size());
	     
        	System.assertEquals(acct.Id, contra[0].AccountId); 
        	
            acct.Impay__c=TRUE;
            acct.Statut_client__c='lead';
            update acct;
        
  			contra[0].amount__c = 1;
        	contra[0].contract_stat__c = 'Accepted';
        	update contra;
        
        	contra[0].contract_stat__c = 'terminated';
        	update contra;
        
        	contra[0].contract_stat__c = 'else';
        	update contra;
            System.assertEquals('lead', acct.Statut_client__c);
        	Test.stopTest();
    }
}