JUNIT testing void methods

Question

I have a java class full of void methods, and I want to make some unit test to get maximal code coverage.

For example I have this method :

protected          


        

Answer 1

You can still unit test a void method by asserting that it had the appropriate side effect. In your method1 example, your unit test might look something like:

public void checkIfValidElementsWithDollarSign() {
    checkIfValidElement("$",19);
    assert ErrorFile.errorMessages.contains("There is a dollar sign in the specified parameter");
}