Regression testing is the process of testing changes
to computer programs to make sure that the older programming still works
with the new changes. It seeks to uncover regression bugs. A
software
bug is an error, flaw, mistake, failure, or fault in a computer program
that prevents it from working as intended. Also referred to as
verification
testing, it is a quality control measure to ensure that the newly
modified code still complies with its specified requirements and that
unmodified code has not been affected by the maintenance activity.
As software industry is gaining popularity, the emergence of faults are
very common. There are several reasons that cause faults in a system and for
proper working of the system, software testing is very essential.
Regression Test can be applied in two ways :
- First, when a code problem has been fixed, a regression test runs
tests to verify that the defect is in fact fixed
- Second, when new code is added to existing code, regression testing
verifies that the existing code continues to work correctly
