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
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