Error messages when the code does not throw an exception are automagically handled.The readability is improved.There is less code to be created.

How do you write a test case for throwing a new exception in JUnit?

If it is a checked exception, you either have to add it to your test method declaration or catch it in the method and Assert to false (if the exception should not occur). You can use the expected field in the @Test annotation, to tell JUnit that this test should pass if the exception occurs.

How do you catch exceptions in JUnit 5?

You can use assertThrows() , But with assertThrows your assertion will pass even if the thrown exception is of child type. This is because, JUnit 5 checks exception type by calling Class. isIntance(..) , Class. isInstance(..) will return true even if the thrown exception is of a child type.