Learn Java Unit Testing with JUnit 5 in 20 Steps - Unit Testing Exceptions

The video tutorial explains how to test exceptions in JUnit, focusing on null pointer exceptions. It demonstrates creating a scenario where a null array is passed to arrays.sort, leading to a null pointer exception. The tutorial covers handling exceptions using try-catch blocks and JUnit annotations, emphasizing the importance of expecting exceptions in tests. It also discusses the behavior of sorting empty arrays and concludes with a summary of exception testing in JUnit.

What happens when a null array is passed to arrays.sort in JUnit?

• It throws an ArrayIndexOutOfBoundsException.

• It throws a NullPointerException.

• It sorts the array in ascending order.

• It returns an empty array.

In JUnit, what is the result of a test if the expected exception is caught using a try-catch block?

• The test succeeds.

• The test is ignored.

• The test fails.

• The test throws an error.

What is the purpose of the @expected annotation in JUnit?

• To run the test multiple times.

• To declare an expected exception.

• To ignore a test case.

• To specify the expected output of a test.

What happens if a test with an @expected annotation does not throw the expected exception?

• The test is skipped.

• The test is marked as inconclusive.

• The test is marked as successful.

• The test fails.

What is the outcome of a JUnit test if an unexpected exception is thrown?

• The test is marked as pending.

• The test is ignored.

• The test fails.

• The test succeeds.