Mockito Tutorial: Learn mocking with 25 Junit Examples - Step 09: Testing Exceptions in JUnit Tests

The video tutorial explains how to test exceptions in JUnit, focusing on handling null pointer exceptions. It covers using try-catch blocks and annotations to expect exceptions, and discusses the outcomes of tests when exceptions are or are not thrown. The tutorial emphasizes that expecting and handling exceptions is a crucial part of testing, and provides examples of how to implement these tests effectively.

What happens when a null array is passed to a sorting method in JUnit tests?

• It sorts the array in ascending order.

• It throws a NullPointerException.

• It returns an empty array.

• It throws an ArrayIndexOutOfBoundsException.

In a JUnit test, what does catching an expected exception indicate?

• The test has failed.

• The test has passed.

• The test is incomplete.

• The test needs to be rerun.

What is the purpose of using a try-catch block in JUnit tests?

• To improve test performance.

• To handle unexpected exceptions.

• To ensure the test always passes.

• To catch and verify expected exceptions.

How can you declare an expected exception in JUnit using annotations?

• By using @ExceptionHandler

• By using @ExpectedException

• By using @CatchException

• By using @Test(expected = Exception.class)

What happens if an expected exception is not thrown in a JUnit test?

• The test is marked as incomplete.

• The test is skipped.

• The test fails.

• The test passes.