Salesforce Platform Developer I Certification Guide

The importance of testing

Why should you write extra code to test whether everything works like a charm? Well, testing is crucial in your development process and is the key to successful long-term development. It is very important to know whether the previous logic still works after a small change that can have an impact on the whole organization. For instance, you add a classic validation rule on an object to avoid having the user being unable to add some erroneous data. If you wrote a test class and created some data that isn't compliant with this rule, your test will fail.

Apex tests are needed for the following reasons:

• To make sure that there are no errors in your code and logic.
• To make sure you get the expected outcomes, as per the ...