assertFalse(iterator.hasNext());
        assertNull(iterator.next());
    }

    @Test
    @DisplayName("Adapter returning null on all entries")
    void adapterReturnsNullOnAll() {
        // Setup
        FileEntry entry1 = mock(FileEntry.class);
        FileEntry entry2 = mock(FileEntry.class);

        when(delegate.hasNext()).thenReturn(true, true, false);