@Test
public void singletonIteratorYieldOneElementInWindow() {
final Iterator<O> iter = Iterations.iterator(O.ONE);
final CenteredWindowIterator<List<Optional<O>>, O> win =
new CenteredWindowIterator<List<Optional<O>>, O>(iter, 3, LIST_FACTORY);
final List<List<Optional<O>>> got = Consumers.all(win);
final List<List<Optional<O>>> expected = new ArrayList<List<Optional<O>>>();
expected.add(Arrays.asList(Optional.<O>empty(), Optional.of(O.ONE), Optional.<O>empty()));
Assert.assertEquals(expected, got);
}
@Test
public void windowsAreInOrder() {
final Iterator<O> iter = Iterations.iterator(O.ONE, O.ANOTHER, O.YET_ANOTHER);
final CenteredWindowIterator<List<Optional<O>>, O> win =
new CenteredWindowIterator<List<Optional<O>>, O>(iter, 3, LIST_FACTORY);
final List<List<Optional<O>>> got = Consumers.all(win);
final List<List<Optional<O>>> expected = new ArrayList<List<Optional<O>>>();
expected.add(Arrays.asList(Optional.<O>empty(), Optional.of(O.ONE), Optional.of(O.ANOTHER)));
expected.add(
Arrays.asList(Optional.of(O.ONE), Optional.of(O.ANOTHER), Optional.of(O.YET_ANOTHER)));
expected.add(
Arrays.asList(Optional.of(O.ANOTHER), Optional.of(O.YET_ANOTHER), Optional.<O>empty()));
Assert.assertEquals(expected, got);
}