ImmutableListMultimapTest.java 文件源码

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