Why won't this Expect Exception Junit Test Work?

Question

This is my test so far:

@Test(expected = FileNotFoundException.class)
public void testExpectedException() {
    UserDataObject u = new UserDataObject(\"rob123\",         


        

Answer 1

Your test is failing because you are expecting the FileNotFoundException, but it not actualy thrown from a method. Why? Because of try/catch wrapper, that swallows the exception, only printing the stack trace to the output.

Change the catch block to

catch (FileNotFoundException e) {
            System.out.println("Error: Could not find database/storage.");
            System.out.println(e.getMessage()); 
            throw e;
            }

and test will pass

Answer 2

The issue is that your verifyUser(UserDataObject u, String filename) method catches both exceptions FileNotFoundException and IOException and hence it is not propagated to your test method.