assertThat(edges).doesNotContain(EndpointPair.ordered(N3, N4)); // nodes not in graph
  }

  // We are testing our implementations of methods on Collection.
  @SuppressWarnings({"CollectionSizeTruth", "CollectionContainsTruth"})
  private static void containsExactlySanityCheck(Collection<?> collection, Object... varargs) {
    assertThat(collection.size()).isEqualTo(varargs.length);
    for (Object obj : varargs) {

    assertThat(edges).doesNotContain(EndpointPair.ordered(N3, N4)); // nodes not in graph
  }

  // We are testing our implementations of methods on Collection.
  @SuppressWarnings({"CollectionSizeTruth", "CollectionContainsTruth"})
  private static void containsExactlySanityCheck(Collection<?> collection, Object... varargs) {
    assertThat(collection.size()).isEqualTo(varargs.length);
    for (Object obj : varargs) {

  public void testAsListIsEmpty() {
    assertThat(Booleans.asList(EMPTY).isEmpty()).isTrue();
    assertThat(Booleans.asList(ARRAY_FALSE).isEmpty()).isFalse();
  }

  @SuppressWarnings("CollectionSizeTruth")
  public void testAsListSize() {
    assertThat(Booleans.asList(EMPTY).size()).isEqualTo(0);
    assertThat(Booleans.asList(ARRAY_FALSE).size()).isEqualTo(1);