@Test
public void whenGroupListUsingMultimap_thenGrouped() {
final List<String> names = Lists.newArrayList("John", "Adam", "Tom");
final Function<String, Integer> function =
new Function<String, Integer>() {
@Override
public final Integer apply(final String input) {
return input.length();
}
};
final Multimap<Integer, String> groups = Multimaps.index(names, function);
assertThat(groups.get(3), containsInAnyOrder("Tom"));
assertThat(groups.get(4), containsInAnyOrder("John", "Adam"));
}
