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() {

          public void failed(State from, Throwable failure) {
            assertEquals(State.RUNNING, from);
            assertEquals(error, failure);
            latch.countDown();
          }
        },
        directExecutor());
    service.startAsync();
    latch.await();

    assertEquals(0, service.numberOfTimesRunCalled.get());
    assertEquals(Service.State.FAILED, service.state());
  }

        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(3, itemList1.size());
        assertEquals(3, itemList1.getAllRecordCount());
        assertEquals(1, itemList1.getCurrentPageNumber());
        assertEquals(20, itemList1.getPageSize());

        final PagingList<KuromojiItem> itemList2 = kuromojiFile.selectList(2, 2);
        assertEquals(1, itemList2.size());
        assertEquals(3, itemList2.getAllRecordCount());

    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);

    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() {

        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"));

    // the underlying supplier hasn't executed yet
    assertEquals(0, countingSupplier.calls);

    assertEquals(10, (int) memoizedSupplier.get());

    // now it has
    assertEquals(1, countingSupplier.calls);

    assertEquals(10, (int) memoizedSupplier.get());

    // it still should only have executed once due to memoization
    assertEquals(1, countingSupplier.calls);
  }

  public void testMemoize() {

    // the underlying supplier hasn't executed yet
    assertEquals(0, countingSupplier.calls);

    assertEquals(10, (int) memoizedSupplier.get());

    // now it has
    assertEquals(1, countingSupplier.calls);

    assertEquals(10, (int) memoizedSupplier.get());

    // it still should only have executed once due to memoization
    assertEquals(1, countingSupplier.calls);
  }

  public void testMemoize() {

        assertEquals(3, dispatched.size());
        assertEquals(1, unresolved.size());
        assertEquals(8, classes.size()); // "plexus.pom" and "junit.jar" are excluded.
        assertEquals(1, modules.size());
        assertEquals("plexus-1.0.11.pom", unresolved.get(0).getFileName().toString());
        assertEquals("test-extension-1.jar", classes.get(0).getFileName().toString());