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sfdc-L how Apex execution works?
Hi all, As we know that how trigger execution works but same thing i want to know how apex class execution works i.e. including test classes and when test classes fails.so kindly let me know asap Thanks!
Apex classes can be used in a number of ways. A few are below:
(1) To hold re-usable code. In this case the class will be instantiated by the code that needs it - e.g. a trigger. visualforce controller, scheduled apex
(2) As an extension/custom visualforce controller - in this case it will be automatically instantiated by the platform when a user lands on a visualforce page.
(3) As a schedulable item - in this case the platform instantiates the class and executes it according to a time schedule
(4) As a custom web service - handled by the platform again.
Test classes are executed when code is deployed to production or on demand by a user. If test classes fail during a deployment then the deployment will be rolled back. Otherwise it will be marked as a failure but there are no other effects.
Developerforce is a good place to look for this kind of information. This wiki page covers testing:
http://wiki.developerforce.com/page/An_Introduction_to_Apex_Code_Test_Methods