ConvertLead

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Trigger<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
trigger leadConversation on Lead (after update) {
    try{
        list<Id> lstId= new list<Id>();
        if(trigger.isExecuting && trigger.isAfter && trigger.isUpdate){
            for(Lead le:trigger.new){
                if(le.Status!=trigger.oldmap.get(le.Id).Status){
                    lstId.add(le.Id);
                }
                if(lstId.size()>0){
                    SampleLeadConversion.PerformingConversion(lstId);
                }
            }
            
        }}catch(DmlException e) {
            System.debug('The following exception has occurred: ' + e.getMessage());
            system.debug('@@@@:'+e.getLineNumber());
        }
    
}


>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Trigger Handler<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

public class SampleLeadConversion {
    
    public static void PerformingConversion(list<Id> lstId){
        try{
            Database.LeadConvert lc = new database.LeadConvert();
            for(Id le:lstId)
                lc.setLeadId(le);
            system.debug('@@@@ lc:'+lc);
            LeadStatus convertStatus = [SELECT Id, MasterLabel FROM LeadStatus WHERE IsConverted=true Limit 49999];
            lc.setConvertedStatus(convertStatus.MasterLabel);
            
            Database.LeadConvertResult lcr = Database.convertLead(lc);
            System.assert(lcr.isSuccess());
        }catch(exception ex){
            system.debug('@@@@ GetMessage: ' +ex.getMessage());
            system.debug('@@@@ GetLineNumber:' +ex.getLineNumber());
        }
        
    }
}

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Test Class<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
@isTest
public class TestConversion {
    
    @TestSetUp public static void CreateTestData(){
        try{
            Lead le= new Lead();
            le.LastName='TestName';
            le.Company='TestCompany';
            le.Status='Working - Contacted';
            insert le;
        }catch(exception ex){
            system.debug('@@@@ getMessage: '+ex.getMessage());
        }
    }
    
    @isTest public static void TestMethod1(){
        try{
            Lead le=[select Id, Status, Company, LastName from Lead Limit 1];
            test.startTest();
            le.Status='Open - Not Contacted';
            update le;
            test.StopTest();
        }catch(exception ex){
            system.debug('@@@@ GetMessage: '+ex.getMessage());
        }}
}