Destructive Test Cases are used to test how strong and stable the application is by intentionally trying to break it. These test cases use extreme or unusual inputs to check the limits of the system.
Purpose: To find the breaking points of the application and fix vulnerabilities before real users or hackers find them.
Focus: Ensures the system does not crash or lose data when exposed to heavy, unusual, or malicious inputs.
Real-Life Example: On a login page, a destructive test case might involve typing a password with 10,000 characters or pasting malicious code into the input box. The system should not crash or behave unpredictably.