Automated Testing is used to reduce or eliminate the cost of actual testing. A script written by testers follows a root sequence of steps automatically more quickly than running each step manually. In automated testing the tests run overnight to present the results in the morning. .

From a cost-benefit perspective, test automation becomes more cost effective when the same tests can be reused many times over, such as for regression testing and test-driven development, and when the results can be interpreted quickly.

We follow two general approaches to test automation:

Code-driven testing:The public interfaces to classes, modules, or libraries are tested with a variety of input arguments to validate that the results that are returned are correct.

Graphical user interface testing: A testing framework generates user interface events such as keystrokes and mouse clicks, and observes the behavior of the program.

Automation Tool are: QTP and Rational Robot