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timaa Help to understand unit tests
Hi! I have class:
and test class:
Can you help me to understand part when I should call method and verify it in test class?
public class DisplayOpportunity{
public PageReference save() {
return null;
}
public List<Opportunity> Elements {get; set;}
public String oppId {get; set;}
public void init() {
Elements = [SELECT Name, CreatedDate, StageName FROM Opportunity WHERE StageName='Prospecting' or StageName='Closed Won'];
}
public void changeStage() {
Opportunity getElements=[SELECT StageName FROM Opportunity WHERE Id = :oppId];
getElements.StageName;
if (getElements.StageName == 'Closed Won')
{
ApexPages.addmessage(new ApexPages.message(ApexPages.severity.WARNING,'Closed Won is set already'));
}
Else {
update getElements;
}
init();
}
}
and test class:
@isTest
public class TestOpportunity {
public static testMethod void insertNewOpportunity() {
//create new opportunity
Opportunity opp = new Opportunity();
opp.Name = 'test Oppo';
opp.CloseDate = System.today();
opp.StageName = 'Prospecting';
insert opp;
//inilizate controller
DisplayOpportunity myOpp = new DisplayOpportunity ();
ApexPages.currentPage().getParameters().put('oppId',opp.Id);
//call method for StageChange
myOpp.changeStage();
}
}
Can you help me to understand part when I should call method and verify it in test class?
After calling your method you should re-extract the opportunity from the database and verify that the stagename has been changed correctly, as per your method:
//Isolate the test execution context test.startTest(); //Call the method myOpp.changeStage(); test.stopTest(); //Retrieve record back from the database Opportunity updatedElement = [SELECT StageName FROM Opportunity WHERE Id = :oppId]; //Assert the method has functioned System.assertEquals('Closed Won', updatedElement.StageName);I strongly recommend that you check out the Unit Testing module on Trailhead here: https://developer.salesforce.com/trailhead/module/apex_testing. The module has some hands on training and elaborates on the hows and whys of unit testing your Apex code.
Cheers,
- James