ImmutableSetMultimapTest.java 文件源码

public void testToImmutableSetMultimap() {
  Collector<Entry<String, Integer>, ?, ImmutableSetMultimap<String, Integer>> collector =
      ImmutableSetMultimap.toImmutableSetMultimap(Entry::getKey, Entry::getValue);
  BiPredicate<ImmutableSetMultimap<?, ?>, ImmutableSetMultimap<?, ?>> equivalence =
      Equivalence.equals()
          .onResultOf(
              (ImmutableSetMultimap<?, ?> mm)
                  -> ImmutableListMultimap.copyOf(mm).asMap().entrySet().asList())
          .and(Equivalence.equals());
  CollectorTester.of(collector, equivalence)
      .expectCollects(ImmutableSetMultimap.of())
      .expectCollects(
          ImmutableSetMultimap.of("a", 1, "b", 2, "a", 3, "c", 4),
          mapEntry("a", 1),
          mapEntry("b", 2),
          mapEntry("a", 3),
          mapEntry("c", 4));
}