@Test
public void zip() {
List<Object> nulls = Collections.nCopies(this.lazyIterable.size(), null);
List<Object> nullsPlusOne = Collections.nCopies(this.lazyIterable.size() + 1, null);
List<Object> nullsMinusOne = Collections.nCopies(this.lazyIterable.size() - 1, null);
LazyIterable<Pair<Integer, Object>> pairs = this.lazyIterable.zip(nulls);
Assert.assertEquals(
this.lazyIterable.toSet(), pairs.collect(Functions.<Integer>firstOfPair()).toSet());
Assert.assertEquals(nulls, pairs.collect(Functions.<Object>secondOfPair(), Lists.mutable.of()));
LazyIterable<Pair<Integer, Object>> pairsPlusOne = this.lazyIterable.zip(nullsPlusOne);
Assert.assertEquals(
this.lazyIterable.toSet(), pairsPlusOne.collect(Functions.<Integer>firstOfPair()).toSet());
Assert.assertEquals(
nulls, pairsPlusOne.collect(Functions.<Object>secondOfPair(), Lists.mutable.of()));
LazyIterable<Pair<Integer, Object>> pairsMinusOne = this.lazyIterable.zip(nullsMinusOne);
Assert.assertEquals(this.lazyIterable.size() - 1, pairsMinusOne.size());
Assert.assertTrue(
this.lazyIterable.containsAllIterable(
pairsMinusOne.collect(Functions.<Integer>firstOfPair())));
Assert.assertEquals(
this.lazyIterable.zip(nulls).toSet(),
this.lazyIterable.zip(nulls, UnifiedSet.<Pair<Integer, Object>>newSet()));
}
@Test
public void keysWithMultiValuesView() {
Multimap<Integer, String> multimap = this.newMultimapWithKeysValues(1, "1", 2, "2", 3, "3");
Assert.assertEquals(
Bags.mutable.of(1, 2, 3), multimap.keyMultiValuePairsView().collect(Pair::getOne).toBag());
Assert.assertEquals(
Bags.mutable.of("1", "2", "3"),
multimap.keyMultiValuePairsView().flatCollect(Functions.secondOfPair()).toBag());
}
@Test
public void zipWithIndex() {
LazyIterable<Pair<Integer, Integer>> pairs = this.lazyIterable.zipWithIndex();
Assert.assertEquals(
this.lazyIterable.toSet(), pairs.collect(Functions.<Integer>firstOfPair()).toSet());
Assert.assertEquals(
Interval.zeroTo(this.lazyIterable.size() - 1).toSet(),
pairs.collect(Functions.<Integer>secondOfPair(), UnifiedSet.<Integer>newSet()));
Assert.assertEquals(
this.lazyIterable.zipWithIndex().toSet(),
this.lazyIterable.zipWithIndex(UnifiedSet.<Pair<Integer, Integer>>newSet()));
}