@Test
void test_iterator_has_next() {

    PeekingIterator<String> peekingIterator = mock(PeekingIterator.class);
    CurrentPeekingIterator<String> currentPeekingIterator =
        Iterators.currentPeekingIterator(peekingIterator);
    Assertions.assertEquals(false, currentPeekingIterator.hasNext());
    Assertions.assertEquals(null, currentPeekingIterator.current());
}