@Test
public void zip() {
ImmutableBag<String> immutableBag = this.newBag();
List<Object> nulls = Collections.nCopies(immutableBag.size(), null);
List<Object> nullsPlusOne = Collections.nCopies(immutableBag.size() + 1, null);
List<Object> nullsMinusOne = Collections.nCopies(immutableBag.size() - 1, null);
ImmutableBag<Pair<String, Object>> pairs = immutableBag.zip(nulls);
Assert.assertEquals(
immutableBag, pairs.collect((Function<Pair<String, ?>, String>) Pair::getOne));
Assert.assertEquals(
HashBag.newBag(nulls), pairs.collect((Function<Pair<?, Object>, Object>) Pair::getTwo));
ImmutableBag<Pair<String, Object>> pairsPlusOne = immutableBag.zip(nullsPlusOne);
Assert.assertEquals(
immutableBag, pairsPlusOne.collect((Function<Pair<String, ?>, String>) Pair::getOne));
Assert.assertEquals(
HashBag.newBag(nulls),
pairsPlusOne.collect((Function<Pair<?, Object>, Object>) Pair::getTwo));
ImmutableBag<Pair<String, Object>> pairsMinusOne = immutableBag.zip(nullsMinusOne);
Assert.assertEquals(immutableBag.size() - 1, pairsMinusOne.size());
Assert.assertTrue(
immutableBag.containsAllIterable(
pairsMinusOne.collect((Function<Pair<String, ?>, String>) Pair::getOne)));
Assert.assertEquals(
immutableBag.zip(nulls), immutableBag.zip(nulls, HashBag.<Pair<String, Object>>newBag()));
}
