Simple Unit Test for Custom Controller

Question

I have written plenty of unit tests for Triggers. But I am kind of stuck on how to write one out for a simple view controller.

Here is the custom controller for my VF Controller:

public with sharing class NotificationListController {

    private final Account account;

    public List<Account_Notification__c> notifications {get;set;}

    date d = system.today();

    public NotificationListController(){

        account = [SELECT Id FROM Account 
                   WHERE Id = :ApexPages.currentPage().getParameters().get('id')];


        notifications = [SELECT Account__c, Related_Product__c, Description__c, Type__c, Expiration_Date__c, Active__c 
                         FROM Account_Notification__c 
                         WHERE Account__c = :account.Id 
                         AND Active__c    = true AND (Expiration_Date__c = null OR Expiration_Date__c > :d)  ];
    }

}

What needs to be asserted? Do I just create account notifications and check for their existence?

Thanks y'all.

Answer 1

In your case you could write methods for

1. Instantiate with the ID parameter of Existing ID and notification within expiration dates - Assert the value of Account and notifications are correct
2. Instantiate without the ID parameter - Assert the value of Account and notifications are correct and that no errors are present
3. Instantiate with the ID parameter of Existing ID and notification not within expiration dates - Assert the value of Account and notifications are correct
4. Instantiate with the ID parameter of a NON-existing Existing ID - Assert the value of Account and notifications are correct and no errors
5. Instantiate with the ID parameter of Existing ID and no notification records existing - Assert the value of Account and notifications are correct

This may seem a bit overboard but if you want to do it right.....(And I could be missing some variations).

I can immediately see that with your current code:

2 and 4 will fail and throw an error