How do you use assertions in JUnit to verify the expected behavior of your code during unit testing?

Using Assertions in JUnit for Unit Testing

When it comes to verifying the expected behavior of code during unit testing in JUnit, assertions play a crucial role. Assertions in JUnit are used to assert or verify the outcomes of method executions against expected values. This ensures that the code functions correctly according to the specified criteria.

One of the key aspects of using assertions in JUnit is to incorporate the focus keyword "assert" directly in your test methods. This can be done by using methods such as assertEquals(), assertTrue(), assertFalse(), assertNotNull(), and many others to check different conditions and outcomes.

By utilizing assertions effectively in JUnit tests, developers can confidently validate the behavior of the code and identify any discrepancies or bugs that may exist. This practice contributes to creating more robust and reliable software applications through comprehensive testing.