Joined: 23 Nov 2005 Posts: 69 Location: Minneapolis, MN USA
Testing will be done in various phases:
We do some change to an exisiting code and change should not have disturbed the required/wanted functionality of the system. Here we do regression testing and compare the results with the one from undisturbed code.
A system may consists of many applications executed in a particular sequence. But while Unit Testing we can neglect the sequence and test individual application. Different applications can be tested parallely too. Files are independant among applications.
But During sytem/integration testing we do test all the applications in sequence. i.e Output files generated by application1 will be used as input to application 2 and so on.
Here we may use Production datasets to test the system.
I tried using my experience to tell u something about Testing..