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What Is Negative Testing

Negative Testing

Negative testing is a type of software testing that validates the behavior of an application when it receives unexpected or invalid input. It is designed to identify defects that may not be found through normal functional testing.

In negative testing, testers intentionally input incorrect data or actions that the application is not designed to handle. The goal is to determine how the application reacts to such inputs and to identify any issues that arise.

Here’s an example of negative testing:

Suppose you are testing a login page for a web application. Normally, users would enter their username and password and click the login button to access the system. However, in negative testing, you might intentionally enter incorrect information or perform unexpected actions, such as:

  • Entering a blank username or password
  • Entering an invalid username or password
  • Entering special characters or symbols in the username or password fields
  • Clicking the login button multiple times rapidly
  • Attempting to log in with an expired or disabled account

By performing these actions, you can see how the application responds to unexpected inputs and whether it handles errors and exceptions correctly. Negative testing helps to ensure that the application is robust and can handle unexpected scenarios, which can improve its overall quality and user experience.

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