Quick attacks are test techniques in which the tester doesn't have to spend a lot of time preparing for, planning, or executing the test. Instead, the tester can sit down with an application (even one they’ve never seen before!) and very quickly start finding important bugs. Many of these tests draw on patterns of data input to the system like February 29th in leap years (or in non- leap years to test for error handling) or special characters in strings, for example.