How to write test class for apex trigger on opportunity

Question

I have created a trigger which calls a future class to make http callout to a third party url, everthing is working fine here but the test class is not covering the opportunity fields IsWon & IsClosed. What modification do I need in test class to make the code coverage at least 75 % for this trigger.

// Apex trigger

trigger oppTrigger on Opportunity (before update) {

String oppType = '';
for(Opportunity opp : Trigger.new){

if (opp.IsClosed == true){  // closed
  if (opp.IsWon == true){
    oppType = 'Won'; // closed-won
   }else{
    oppType = 'Lost'; // closed-lost
   }
} else { // open
       oppType = 'Open'; 
    }
  // call a method with @future annotation
   futureCls.srvcCallout(opp.id,opp.Amount,oppType); 
 }
}

// future class for trigger with future method

global class futureCls {
@future(callout=true)
Public static void srvcCallout(String oppId, Decimal oppAmt, String oppType){

     // Create http request
     HttpRequest req = new HttpRequest();
     req.setMethod('POST');
     req.setHeader('Content-Type', 'application/json;charset=UTF-8');     
     req.setEndpoint('https://www.testurl.com/salesforce/opp-change'+'?id='+oppId+'&amt='+oppAmt+'&stage='+oppType);

     // create web service
     Http http = new Http();
      try {
        // Execute web service call here     
        HTTPResponse res = http.send(req);  
        // Debug messages
        System.debug('RESPONSE:'+res.toString());
        System.debug('STATUS:'+res.getStatus());
        System.debug('STATUS_CODE:'+res.getStatusCode());
        System.debug('BODY:'+res.getBody());

        } catch(System.CalloutException e) {
             // Exception handler
             System.debug('Error connecting to Paperless..');
       }   
     }
 }

// Test class for the trigger where I'm stuck:-

@isTest
private class futureCls_Test {  

 private static testMethod void srvcCallout_Test() {        

    Test.startTest();

    // Unit test to cover trigger update event
    Opportunity opp = new Opportunity(Name='test opp', StageName='stage', Probability = 95, CloseDate=system.today());
    insert opp;
    opp.Amount = 1000;
    opp.StageName = 'Closed/Won';
    update opp;

    // Assign some test values
    String oppId = '1sf2sfs2';
    Decimal oppAmt = 4433.43;
    String oppType = 'Won';

    // Unit test to cover future method
    futureCls.srvcCallout(oppId, oppAmt,oppType);    

    // Unit test to cover http web service
    Test.setMock(HttpCalloutMock.class, new futureClsCalloutMock()); 
    Test.stopTest();

  }
}

pburns1587 pburns1587 · Accepted Answer · 2017-07-25T20:15:47

Your test class will have to do the following to hit all of that trigger:

Note, this is just one way to do it, you could do it a few different ways

Create a new opportunity
Update the opportunity to some status that's "Open"
Create a new opportunity
Update the opportunity to Closed/Lost
Create a new opportunity
Update the opportunity to Closed/Won

If you asked me, a TestDataFactory function that created an opportunity and then updated it to a specified status would be helpful:

@isTest
public testOpportunityWithStatusChange(targetStatus){
    //do stuff here
};

You could then call that factory once for every status you wanted to check within your test class to cover the trigger.

How to write test class for apex trigger on opportunity

1 Answers