Iterable<Character> result = Traverser.forGraph(graph).breadthFirst(charactersOf("ab"));

    assertEqualCharNodes(Iterables.limit(result, 2), "ab");
    assertThat(graph.requestedNodes).containsExactly('a', 'a', 'b', 'b');

    // Iterate again to see if calculation is done again
    assertEqualCharNodes(Iterables.limit(result, 2), "ab");
    assertThat(graph.requestedNodes).containsExactly('a', 'a', 'a', 'b', 'b', 'b');
  }

    mutableNetwork.addEdge("A", "A", "AA");
    mutableNetwork.addEdge("A", "B", "AB");
    Network<String, String> network = ImmutableNetwork.copyOf(mutableNetwork);

    assertThat(network.edgesConnecting("A", "A")).containsExactly("AA");
    assertThat(network.edgesConnecting("A", "B")).containsExactly("AB");
    assertThat(network.edgesConnecting("B", "A")).containsExactly("AB");
  }

  @Test

    assertEquals(Proxy.getInvocationHandler(proxy).toString(), proxy.toString());
  }

  interface A {}

  interface B {}

  public void testEquals() {
    class AB implements A, B {}
    class BA implements B, A {}
    AB ab = new AB();
    BA ba = new BA();
    new EqualsTester()
        .addEqualityGroup(newDelegatingList(LIST1))
        // Actually, this violates List#equals contract.

    Iterable<Character> result = Traverser.forGraph(graph).breadthFirst(charactersOf("ab"));

    assertEqualCharNodes(Iterables.limit(result, 2), "ab");
    assertThat(graph.requestedNodes).containsExactly('a', 'a', 'b', 'b');

    // Iterate again to see if calculation is done again
    assertEqualCharNodes(Iterables.limit(result, 2), "ab");
    assertThat(graph.requestedNodes).containsExactly('a', 'a', 'a', 'b', 'b', 'b');
  }

    mutableNetwork.addEdge("A", "A", "AA");
    mutableNetwork.addEdge("A", "B", "AB");
    Network<String, String> network = ImmutableNetwork.copyOf(mutableNetwork);

    assertThat(network.edgesConnecting("A", "A")).containsExactly("AA");
    assertThat(network.edgesConnecting("A", "B")).containsExactly("AB");
    assertThat(network.edgesConnecting("B", "A")).containsExactly("AB");
  }

  @Test

    ImmutableList<String> a = ImmutableList.of("a");
    ImmutableList<String> aa = ImmutableList.of("a", "a");
    ImmutableList<String> ab = ImmutableList.of("a", "b");
    ImmutableList<String> b = ImmutableList.of("b");

    Helpers.testComparator(lexy, empty, a, aa, ab, b);

    new EqualsTester()
        .addEqualityGroup(lexy, Comparators.lexicographical(comparator))

    assertEquals(Proxy.getInvocationHandler(proxy).toString(), proxy.toString());
  }

  interface A {}

  interface B {}

  public void testEquals() {
    class AB implements A, B {}
    class BA implements B, A {}
    AB ab = new AB();
    BA ba = new BA();
    new EqualsTester()
        .addEqualityGroup(newDelegatingList(LIST1))
        // Actually, this violates List#equals contract.

    // These have a combination of invalid length and unrecognized characters.
    assertFailsToDecode(base16(), "?", "Invalid input length 1");
    assertFailsToDecode(base16(), "ab");
    assertFailsToDecode(base16().lowerCase(), "AB");
  }

  public void testBase16Offset() {
    testEncodesWithOffset(base16(), "foobar", 0, 6, "666F6F626172");
    testEncodesWithOffset(base16(), "foobar", 1, 5, "6F6F626172");

    ImmutableList<String> a = ImmutableList.of("a");
    ImmutableList<String> aa = ImmutableList.of("a", "a");
    ImmutableList<String> ab = ImmutableList.of("a", "b");
    ImmutableList<String> b = ImmutableList.of("b");

    Helpers.testComparator(lexy, empty, a, aa, ab, b);

    new EqualsTester()
        .addEqualityGroup(lexy, Comparators.lexicographical(comparator))

    // These have a combination of invalid length and unrecognized characters.
    assertFailsToDecode(base16(), "?", "Invalid input length 1");
    assertFailsToDecode(base16(), "ab");
    assertFailsToDecode(base16().lowerCase(), "AB");
  }

  public void testBase16Offset() {
    testEncodesWithOffset(base16(), "foobar", 0, 6, "666F6F626172");
    testEncodesWithOffset(base16(), "foobar", 1, 5, "6F6F626172");