Question

I need to return new Date() each time I make a call to getLastModifiedDate. I’m using this mock:

when(network.getLastModifiedDateOf(any(URL.class))).
            thenReturn(formatDate(new Date()));

However, every time getLastModifiedDateOf is called it returns the same date/time of when the test started. I think I need something like a C# delegate to call new Date() each time that mock is hit.

Answer 1

Look at Answer callbacks, rather than direct return values.

when(...).thenAnswer(new Answer() {
    Object answer(InvocationOnMock invocation) {
        return formatDate(new Date());
    }
});