    @Test
    public void testEmptyClassNames() {

        when(configuration.getStringArray(eq("zuul.filters.classes"))).thenReturn(new String[]{});
        when(configuration.getStringArray(eq("zuul.filters.packages"))).thenReturn(new String[]{});

        String[] classNames = module.findClassNames(configuration);

        assertThat(classNames.length, equalTo(0));
    }