Apex Test Class for Visual Force (VF) Pages Controller Extension : jayakrishnasfdc

Apex Test Class for Visual Force (VF) Pages Controller Extension
by: jayakrishnasfdc
blow post content copied from  Jayakrishna Ganjikunta
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Controller extensions and custom controllers, like all Apex scripts, should be covered by unit tests. Unit tests are class methods that verify whether a particular piece of code is working properly. Unit test methods take no arguments, commit no data to the database, and are flagged with the testMethod keyword in the method definition.

When writing unit tests for controller extension and custom controller classes, you can set query parameters that can then be used in the tests.

A controller extension is an Apex class that extends the functionality of a standard or custom controller. The class constructor takes a single argument of type ApexPages.StandardController or CustomControllerName, where CustomControllerName is the name of a custom controller you want to extend.
The extension is associated with the page using the extensions attribute of <apex:page> the component
For example: <apex:page standardController=”Account” extensions=”AccountControllerExtension”>

Testing the Controller Extension

Controller extensions like all Apex codes should be covered by unit tests. Unit tests are class methods that verify whether a particular piece of code is working correctly as expected. Apex unit test methods take no arguments, commit no data to the database, and are decorated with the @isTest annotation in the method definition.
Consider the controller extension below:

public class AccountControllerExtension {
    Account acct;
    //the controller extension constructor
    public AccountControllerExtension(ApexPages.StandardController controller) {
             this.acct = (Account) controller.getRecord();
    }
       public List<Opportunity> getChildOpps() {
        return [Select Name, Amount, CloseDate, StageName
        From Opportunity
        Where AccountId =:acct.Id
        and (IsWon = true or IsClosed = false)];
     }
}

The markup named AccountNew below uses the above controller:

<apex:page standardController="Account"
extensions="AccountControllerExtension">
 <apex:form >
    <apex:pageBlock >
      <apex:pageblockButtons >
        <apex:commandButton action="{!save}" value="save" />
        </apex:pageblockButtons>
        <apex:inputField value="{!Account.Rating}" />
        <apex:pageblocktable value="{!childOpps}" var="op">
            <apex:column value="{!op.Name}"/>
            <apex:column value="{!op.Amount}"/>
            <apex:column value="{!op.StageName}"/>
            <apex:column value="{!op.CloseDate}"/>
        </apex:pageblocktable>    
      </apex:pageBlock>
</apex:form>

</apex:page>

Comment: The Visualforce angle bracket in the above code changed to &lt; because the Custom Html block is not working. I’m working to resolve it

The Apex Test class below test the controller

@isTest
public class AccountControllerExtensionTest {

    @isTest static void testAccountOpportunity(){    
       Account ac = new Account(Name = 'Test Account');   
       insert ac;       
      //AccountNew is the Visualforce page created
       PageReference testPage = Page.AccountNew; 
       Test.setCurrentPage(testPage);
       testPage.getParameters().put('Id', String.valueOf(ac.Id));
       
       ApexPages.StandardController sc = new  ApexPages.StandardController(ac);     
       AccountControllerExtension ext = new AccountControllerExtension(sc);         
        
       System.debug(ext.getChildOpps()); 
       List<Account> al = [Select Name from Account where Name LIKE '%Test%' LIMIT 1];
       System.assertEquals(1, al.size());
   } 
  }  

Another Example:

Reference from http://amitsalesforce.blogspot.com/

Test Class for Standard Controller

@isTest 
public class ExtensionTestClass 
{
 static testMethod void testMethod1() 
 {
 Account testAccount = new Account();
 testAccount.Name='Test Account record' ;
 insert testAccount;

 Test.StartTest(); 
  ApexPages.StandardController sc = new ApexPages.StandardController(testAccount);
  myControllerExtension testAccPlan = new myControllerExtension(sc);

  PageReference pageRef = Page.AccountPlan; // Add your VF page Name here
  pageRef.getParameters().put('id', String.valueOf(testAccount.Id));
  Test.setCurrentPage(pageRef);

  //testAccPlan.save(); call all your function here
 Test.StopTest();
 }
}

Test Class for Controller class

@isTest 
public class ControllerTestClass 
{
 static testMethod void testMethod1() 
 {
 Account testAccount = new Account();
 testAccount.Name='Test Account record' ;
 insert testAccount;

 Test.StartTest(); 

  PageReference pageRef = Page.AccountPlan; // Add your VF page Name here
  pageRef.getParameters().put('id', String.valueOf(testAccount.Id));
  Test.setCurrentPage(pageRef);

  myController testAccPlan = new myController();
  
  //testAccPlan.save(); call all your function here
 Test.StopTest();
 }
}

Test Class for StandardSetController

@isTest 
public class TestStandardSetController 
{
 static testMethod void testMethod1() 
 {
 List <Account> lstAccount = new List<Account>();
 
 Account testAccount = new Account();
 testAccount.Name='Test Account' ;
 lstAccount.add(testAccount);
 Account testAccount1 = new Account();
 testAccount1.Name='Test Account11' ;
 lstAccount.add(testAccount1);

 insert  lstAccount;
 
 Test.startTest();
  Test.setCurrentPage(Page.YOUR_PAGE);
  ApexPages.StandardSetController stdSetController = new ApexPages.StandardSetController(lstAccount);
  stdSetController.setSelected(lstAccount);
  YOUR_Extension ext = new YOUR_Extension(stdSetController);
 Test.stopTest();
 }
}

January 02, 2021 at 12:03PM
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