Best Practices to Write Visualforce Pages & Test Classes

Best Practices to Write Visualforce Pages:

Ø  Do not hardcode picklist in Visualforce Page, include them in the Controller instead.

Ø  Javascript & CSS should be included as Static Resources allowing the browser to Cache them.

Ø  Reference CSS at the top and Javascript at the bottom of the Visualforce Page as this provides faster page loads.

Ø  Mark Controller Variable as Transient if they are not needed between server calls. This will make your page load faster as it reduces the size of View State.

Ø  Use <apex:repeat> to iterate over large collections.

Ø  Use the Cache attribute with the <apex:page> component to take advantage of CDN Caching when appropriate.

Best Practices to Write Test Classes:

Ø  Use a consistent Naming convention using Test and the name of the class being tested.

Ø  Should use the @isTest annotation.

Ø  Test method should create all the Test Data needed for the method.

Ø  Use System.assert liberally to prove that the code behaves as expected.

Ø  Write Test Methods for both Pass & Fail for certain conditions and test for Boundary conditions.

Ø  When testing for Governor Limits, use Test.startTest and Test.stopTest and the Limit Class  instead of hardcoding Governor Limits.