Junit Testing in java

Question

Hi,
I want to test a method in java using JUnit but this method neither return any value nor raises any exception. How do i test it using JUnit?
Thanks in advance

Answer 1

To perform any test you need to
- perform an operation.
- determine if the operation was sucessful.
The meaning of successful is very broad. It can be as simple as; does it compile or does it run without a RuntimeException/Error. (these are not givens in every case) Or more complex such as; does it perform correctly in a multi-threaded, networked environment.
You need to decide what you are testing and how to determine its success. This can mean refectoring you code to determine if it was successful. For example some code is written to display errors to the console. This is hard to test for and it can be simpler to change your code so this is optional and the error can be determined by the caller.
IMHO, you want to minimise output to the screen. It is not an automated test if it relies on the user seeing an error message (or even reading the output)
If you really don't have an option on what a successful test mean. Just start with the simplest case. i.e. does it compile and run without error. With unit tests it is often better to have this test than none at all.