assume().that(graphIsMutable()).isTrue();

    Set<Integer> nodes = graph.nodes();
    assertThrows(UnsupportedOperationException.class, () -> nodes.add(N2));
    addNode(N1);
    assertThat(graph.nodes()).containsExactlyElementsIn(nodes);
  }

  @Override
  @Test
  public void adjacentNodes_checkReturnedSetMutability() {
    assume().that(graphIsMutable()).isTrue();

    addNode(N1);

    ImmutableMap<String, String> expected =
        ImmutableMap.of("boy", "tom", "girl", "tina", "cat", "kitty", "dog", "tommy");
    assertThat(m).isEqualTo(expected);
    assertThat(m.entrySet()).containsExactlyElementsIn(expected.entrySet()).inOrder();
  }

  public void testMapSplitter_trimmedEntries() {
    Map<String, String> m =
        COMMA_SPLITTER
            .trimResults()

    while (!q.isEmpty()) {
      assertThat(q).containsExactlyElementsIn(contents);
      Integer next = q.pollFirst();
      contents.remove(next);
      assertThat(q).containsExactlyElementsIn(contents);
      for (int i = 0; i <= size; i++) {
        q.add(i);
        contents.add(i);
        assertThat(q).containsExactlyElementsIn(contents);
        q.add(next);
        contents.add(next);

    ImmutableSortedSet<String> set = ImmutableSortedSet.copyOf(strings);
    sort(strings);
    for (int i = 0; i < strings.length; i++) {
      assertThat(set.headSet(strings[i], true))
          .containsExactlyElementsIn(sortedNumberNames(0, i + 1))
          .inOrder();
    }
  }

  public void testHeadSetExclusive() {
    String[] strings = NUMBER_NAMES.toArray(new String[0]);

    addNode(N1);
    ImmutableSet<Integer> nodes = ImmutableSet.copyOf(networkAsMutableNetwork.nodes());
    assertFalse(networkAsMutableNetwork.addNode(N1));
    assertThat(networkAsMutableNetwork.nodes()).containsExactlyElementsIn(nodes);
  }

  @Test
  public void removeNode_existingNode() {
    assume().that(graphIsMutable()).isTrue();

    addEdge(N1, N2, E12);
    addEdge(N4, N1, E41);

    assertThrows(UnsupportedOperationException.class, () -> edgesConnecting.add(E23));
    network.addEdge(N1, N2, E12);
    assertThat(networkForTest.edgesConnecting(N1, N2)).containsExactlyElementsIn(edgesConnecting);
  }

  @Test
  public void edgesConnecting_oneEdge() {
    network.addEdge(N1, N2, E12);
    assertThat(networkForTest.edgesConnecting(N1, N2)).containsExactly(E12);

      assertThat(location.scanResources()).containsExactlyElementsIn(resources);
    }
  }

  public void testLocationsFrom_idempotentLocations() {
    ImmutableSet<ClassPath.LocationInfo> locations =
        ClassPath.locationsFrom(getClass().getClassLoader());
    assertThat(ClassPath.locationsFrom(getClass().getClassLoader()))
        .containsExactlyElementsIn(locations);
  }

    ImmutableSortedSet<Integer> asSet = RANGE_SET_ONE.asSet(DiscreteDomain.integers());
    assertEquals(expectedSet, asSet);
    assertThat(asSet).containsExactlyElementsIn(expectedSet).inOrder();
    assertTrue(asSet.containsAll(expectedSet));
    SerializableTester.reserializeAndAssert(asSet);
  }

  public void testAsSetHeadSet() {

    multimap.put("bar", 3);
    multimap.put("foo", 2);
    LinkedListMultimap<String, Integer> copy = LinkedListMultimap.create(multimap);
    assertEquals(multimap, copy);
    assertThat(copy.entries()).containsExactlyElementsIn(multimap.entries()).inOrder();
  }

  public void testCreateFromSize() {
    LinkedListMultimap<String, Integer> multimap = LinkedListMultimap.create(20);
    multimap.put("foo", 1);

    Object[] lookupKeys = new Object[] {new Object(), new Object(), new Object()};
    Map<Object, Object> result = cache.getAll(asList(lookupKeys));
    assertThat(result.keySet()).containsExactlyElementsIn(asList(lookupKeys));
    for (Entry<Object, Object> entry : result.entrySet()) {
      Object key = entry.getKey();
      Object value = entry.getValue();
      assertSame(value, result.get(key));