Gray box testing

Gray box testing sometimes called as Grey box testing. It is a combination of black box and white box testing features. In Gray box testing technique testing is carried out with a limited knowledge of the internal workings of an application. Testers have access to design documents and the database with this knowledge; testers can prepare better test data and test scenarios while preparing a test plan.

Below image illustrates the key differences between Black box, White box and Gray box testing techniques.

    Black box testing                    White box testing             Grey box Testing

Advantages:

• Testing is done from users point of view
• No need to depend up on source code

Disadvantages:

• Test coverage is limited
• Limited access to source code