public void testFlatteningToImmutableSetMultimap() { Collector<String, ?, ImmutableSetMultimap<Character, Character>> collector = ImmutableSetMultimap.flatteningToImmutableSetMultimap( str -> str.charAt(0), str -> str.substring(1).chars().mapToObj(c -> (char) c)); BiPredicate<Multimap<?, ?>, Multimap<?, ?>> equivalence = Equivalence.equals() .onResultOf((Multimap<?, ?> mm) -> ImmutableList.copyOf(mm.asMap().entrySet())) .and(Equivalence.equals()); ImmutableSetMultimap<Character, Character> empty = ImmutableSetMultimap.of(); ImmutableSetMultimap<Character, Character> filled = ImmutableSetMultimap.<Character, Character>builder() .putAll('b', Arrays.asList('a', 'n', 'a', 'n', 'a')) .putAll('a', Arrays.asList('p', 'p', 'l', 'e')) .putAll('c', Arrays.asList('a', 'r', 'r', 'o', 't')) .putAll('a', Arrays.asList('s', 'p', 'a', 'r', 'a', 'g', 'u', 's')) .putAll('c', Arrays.asList('h', 'e', 'r', 'r', 'y')) .build(); CollectorTester.of(collector, equivalence) .expectCollects(empty) .expectCollects(filled, "banana", "apple", "carrot", "asparagus", "cherry"); }
public void testFlatteningToImmutableSetMultimap() { Collector<String, ?, ImmutableSetMultimap<Character, Character>> collector = ImmutableSetMultimap.flatteningToImmutableSetMultimap( str -> str.charAt(0), str -> str.substring(1).chars().mapToObj(c -> (char) c)); BiPredicate<Multimap<?, ?>, Multimap<?, ?>> equivalence = Equivalence.equals() .onResultOf((Multimap<?, ?> mm) -> ImmutableList.copyOf(mm.asMap().entrySet())) .and(Equivalence.equals()); ImmutableSetMultimap<Character, Character> empty = ImmutableSetMultimap.of(); ImmutableSetMultimap<Character, Character> filled = ImmutableSetMultimap.<Character, Character>builder() .putAll('b', Arrays.asList('a', 'n', 'a', 'n', 'a')) .putAll('a', Arrays.asList('p', 'p', 'l', 'e')) .putAll('c', Arrays.asList('a', 'r', 'r', 'o', 't')) .putAll('a', Arrays.asList('s', 'p', 'a', 'r', 'a', 'g', 'u', 's')) .putAll('c', Arrays.asList('h', 'e', 'r', 'r', 'y')) .build(); CollectorTester.of(collector, equivalence) .expectCollects(empty) .expectCollects(filled, "banana", "apple", "carrot", "asparagus", "cherry"); }