public void testSITwo() {
HashSet s1 = new HashSet();
s1.add("a");
Iterators.Sequence it = new Iterators.Sequence(new Iterator[] {s1.iterator()});
assertIteration(it, new Object[] {"a"});
it.remove();
assertEquals(Collections.EMPTY_SET, s1);
assertIllegalState(it);
List xs = Arrays.asList(new String[] {"a", "b"});
List ixs = Collections.unmodifiableList(xs);
Iterators.Sequence it2 = new Iterators.Sequence(new Iterator[] {ixs.iterator()});
assertIteration(it2, new Object[] {"a", "b"});
assertUnsupportedOperation(it2); // explicitly not modifiable
ArrayList xs2 = new ArrayList();
xs2.add("a");
xs2.add("b");
Iterators.Sequence it3 = new Iterators.Sequence(new Iterator[] {xs2.iterator()});
assertIteration(it3, new Object[] {"a", "b"});
it3.remove();
ArrayList xs2expected = new ArrayList();
xs2expected.add("a");
assertEquals(xs2expected, xs2);
ArrayList xs3 = new ArrayList();
xs3.add("a");
xs3.add("b");
Iterators.Sequence it4 = new Iterators.Sequence(new Iterator[] {xs3.iterator()});
it4.next();
it4.remove();
ArrayList xs3expected = new ArrayList();
xs3expected.add("b");
assertEquals(xs3expected, xs3);
}
public void testSISix() {
ArrayList empty = new ArrayList();
ArrayList ab = new ArrayList();
ab.add("a");
ab.add("b");
ArrayList cd = new ArrayList();
cd.add("c");
cd.add("d");
Iterators.Sequence it =
new Iterators.Sequence(
new Iterator[] {
ab.iterator(), empty.iterator(),
empty.iterator(), cd.iterator()
});
it.next();
it.next();
it.remove();
ArrayList a = new ArrayList();
a.add("a");
assertEquals(a, ab);
it.next();
it.remove();
ArrayList d = new ArrayList();
d.add("d");
assertEquals(d, cd);
}