Question

Using JUnit4, what I want to do is to be able to test a group of different java projects that all do the same thing, but instead of have to write out a test case to test each project i was wondering is it possible to write a single test that can be run on multiple classes?

If this is not possible using JUnit4, is it possible to do this any other way?

I know this isnt right but this is just to give a brief idea of what I am on about:

@Test
public void test(Class insertClassNameHere, Method nameOfMethod){
    Class insertClassNameHere = new Class();
    assertEquals(insertClassNameHere.nameOfMethod(),1);
}

Answer 1

You can using JUnit’s @Parameterized.

@RunWith(Parameterized.class)
public class BehaviorTest {
    @Parameters
    public static Collection<Object[]> classesAndMethods() {
        List<Object[]> list = new ArrayList<Object[]>();
        list.add(new Object[]{ Foo.class, Foo.class.getMethod("foo") });
        return list;
    }

    private Class clazz;
    private Method method;

    public BehaviorTest(Class clazz, Method method) {
         this.clazz = clazz;
         this.method = method;
    }

    @Test
    public void testBehavior() {
        // Do stuff
    }
}