Testing Your Controller Extentions

In a previous post I pointed it out how you can get good test coverage when deploying your VF pages. Since then many readers asked me about deploying VF pages with Controller Extensions.

In concept they are the same and the test is done with the same approach!

In this article I will show you how similar the Custom Controllers and Controller Extensions are. Very simple but maybe with a little twist!

Let's imagine that we have a Visualforce Page that extends the standard controller "Contact".

Here is how the page looks like:

<apex:page standardController="Contact" extensions="myControllerExtention">
<apex:form >
<apex:detail id="contactDetail" />
</apex:form>
</apex:page>

Very simple page, so when the page is viewed the URL will be like:
https://cs2.salesforce.com/apex/mypage?id=003200000005LaO

Where id parameter will be a contact's id and the user will see a page the same as Contact's detail page.

The controller looks like this:

public class myControllerExtention {

private Contact con;

public myControllerExtention(ApexPages.StandardController stdController)

{

this.con = (Contact)stdController.getRecord();

}

public string GetContactName()

{

return con.Name;

}

}

And now is the time we developed the Tester class.

The tester class should implement a method that creates an instance of the Contact controller and then pass that controller to the Constructor of our Extension class. That's it, the rest is the same as testing Custom controllers.

public class testMyPage {

static testMethod void myPage_Test()

{

//Test converage for the myPage visualforce page

PageReference pageRef = Page.MyPage;

Test.setCurrentPageReference(pageRef);

Account newAccount = new Account (name='XYZ Organization');

insert newAccount;

//create first contact

Contact myContact = new Contact (FirstName='Joe',

LastName='Schmoe',

AccountId=newAccount.id);

insert myContact;

ApexPages.StandardController sc = new ApexPages.standardController(myContact);

// create an instance of the controller

myControllerExtention myPageCon = new myControllerExtention(sc);

//try calling methods/properties of the controller in all possible scenarios

// to get the best coverage.

string ConName = myPageCon.GetContactName();

}

}

Happy coding!