Black Box Testing

It is Software testing technique to test the functionality of software without having knowledge on internal working structure of the code. This kind of testing is done based on requirements of application. For black box testing it is not mandatory to know internal working structure of software.

For example:

Login Screen with user name and password input field.

1) Provide valid input for user name and password and verify we can able to login successfully.

2) Provide invalid input for user name and valid password and verify we should not able to login.

In this case we don't know the internal working structure of code, just tester should know knowledge on valid input to login successfully and invalid input for unsuccessful authenticate.

Click here to see Black Box Testing Techniques