Monkey Testing

Testing a system or an Application on the fly, i.e. just few tests here and there to ensure the system or an application does not crash out.

Negative Testing

Testing aimed at showing software does not work. Also known as "test to fail".

N+1 Testing

A variation of Regression Testing. Testing conducted with multiple cycles in which errors found in test cycle N are resolved and the solution is retested in test cycle

N+1. The cycles are typically repeated until the solution reaches a steady state and there are no errors.