assertEquals(Collections.emptyList(), multimap.get("foo"));
    assertEquals(0, multimap.hashCode());
    assertTrue(multimap.isEmpty());
    assertEquals(HashMultiset.create(), multimap.keys());
    assertEquals(Collections.emptySet(), multimap.keySet());
    assertEquals(0, multimap.size());
    assertTrue(multimap.values().isEmpty());
    assertEquals("{}", multimap.toString());
  }

            }
        };

        assertEquals(Locale.ROOT, fessConfig.getQueryLocaleFromName(null));
        assertEquals(Locale.ROOT, fessConfig.getQueryLocaleFromName(""));
        assertEquals(Locale.ROOT, fessConfig.getQueryLocaleFromName("ja"));
        assertEquals(Locale.JAPANESE, fessConfig.getQueryLocaleFromName("test_ja"));
        assertEquals(Locale.CHINESE, fessConfig.getQueryLocaleFromName("test_zh"));

  }

  public void testToString() {
    assertEquals("foo=1", entry("foo", 1).toString());
  }

  public void testToStringNull() {
    assertEquals("null=1", entry(NK, 1).toString());
    assertEquals("foo=null", entry("foo", NV).toString());
    assertEquals("null=null", entry(NK, NV).toString());
  }

  public void testEquals() {

    SortedSet<@Nullable String> keySet = multimap.keySet();

    assertEquals(null, keySet.first());
    assertEquals("google", keySet.last());
    assertEquals(StringLength.COMPARATOR, keySet.comparator());
    assertEquals(Sets.<@Nullable String>newHashSet(null, "tree"), keySet.headSet("yahoo"));
    assertEquals(Sets.newHashSet("google"), keySet.tailSet("yahoo"));
    assertEquals(Sets.newHashSet("tree"), keySet.subSet("ask", "yahoo"));
  }

    Set<String> all = Sets.union(friends, enemies);
    assertEquals(5, all.size());

    ImmutableSet<String> immut = Sets.union(friends, enemies).immutableCopy();
    HashSet<String> mut = Sets.union(friends, enemies).copyInto(new HashSet<String>());

    enemies.add("Buck");
    assertEquals(6, all.size());
    assertEquals(5, immut.size());
    assertEquals(5, mut.size());
  }

  public void testIntersection() {

        assertEquals(0, list.size());

        list = crawlerThread.getClientRuleList("");
        assertEquals(0, list.size());

        list = crawlerThread.getClientRuleList(" ");
        assertEquals(0, list.size());

        list = crawlerThread.getClientRuleList("playwright:http://.*");
        assertEquals(1, list.size());
        assertEquals("playwright", list.get(0).getFirst());

        assertEquals("", documentHelper.appendLineNumber("L", null));
        assertEquals("", documentHelper.appendLineNumber("L", ""));
        assertEquals("", documentHelper.appendLineNumber("L", " "));
        assertEquals("", documentHelper.appendLineNumber("L", "\n"));
        assertEquals("", documentHelper.appendLineNumber("L", "\n\n"));
        assertEquals("", documentHelper.appendLineNumber("L", "\n \n"));

    assertEquals(Ordering.natural(), asMap.comparator());
    assertEquals("foo", asMap.firstKey());
    assertEquals("tree", asMap.lastKey());
    Set<Integer> fooValues = ImmutableSet.of(1, 3, 7);
    Set<Integer> googleValues = ImmutableSet.of(2, 6);
    Set<Integer> treeValues = ImmutableSet.of(4, 0);

    in.readFully(actual);
    assertEquals('r', actual[0]);
    assertEquals(0, actual[1]);
    assertEquals((byte) 0xC9, actual[2]);
    assertEquals(0, actual[3]);
    assertEquals('s', actual[4]);
    assertEquals(0, actual[5]);
    assertEquals('u', actual[6]);
    assertEquals(0, actual[7]);
    assertEquals('m', actual[8]);
    assertEquals(0, actual[9]);
    assertEquals((byte) 0xC9, actual[10]);

    EnumHashBiMap<Currency, String> bimap = EnumHashBiMap.create(Currency.class);
    assertTrue(bimap.isEmpty());
    assertEquals("{}", bimap.toString());
    assertEquals(HashBiMap.create(), bimap);
    bimap.put(Currency.DOLLAR, "dollar");
    assertEquals("dollar", bimap.get(Currency.DOLLAR));
    assertEquals(Currency.DOLLAR, bimap.inverse().get("dollar"));
  }

  public void testCreateFromMap() {