assertEquals(3, Iterables.frequency(multiset, "a"));
    assertEquals(2, Iterables.frequency(multiset, "b"));
    assertEquals(1, Iterables.frequency(multiset, "c"));
    assertEquals(0, Iterables.frequency(multiset, "d"));
    assertEquals(0, Iterables.frequency(multiset, 4.2));
    assertEquals(0, Iterables.frequency(multiset, null));
  }

    assertEquals("", Files.getFileExtension("."));
    assertEquals("", Files.getFileExtension(".."));
    assertEquals("", Files.getFileExtension("..."));
    assertEquals("", Files.getFileExtension("blah"));
    assertEquals("", Files.getFileExtension("blah."));
    assertEquals("", Files.getFileExtension(".blah."));
    assertEquals("", Files.getFileExtension("/foo.bar/blah"));

    assertEquals(0, ticker.read());
    assertEquals(10, ticker.read());
    assertEquals(20, ticker.read());
  }

  public void testAutoIncrementStep_millis() {
    FakeTicker ticker = new FakeTicker().setAutoIncrementStep(1, TimeUnit.MILLISECONDS);
    assertEquals(0, ticker.read());
    assertEquals(1000000, ticker.read());
    assertEquals(2000000, ticker.read());
  }

    assertThat(factory.getTypeParameters()).hasLength(2);
    assertEquals(type.getTypeParameters()[0], factory.getTypeParameters()[0]);
    assertEquals(constructor.getTypeParameters()[0], factory.getTypeParameters()[1]);
    ParameterizedType returnType = (ParameterizedType) factory.getReturnType().getType();
    assertEquals(type, returnType.getRawType());
    assertEquals(
        ImmutableList.copyOf(type.getTypeParameters()),

      assertEquals(min, ordering.min(shuffledList));
      assertEquals(min, ordering.min(shuffledList.iterator()));
      assertEquals(min, ordering.min(first, second, third, rest));
      assertEquals(min, ordering.min(min, max));
      assertEquals(min, ordering.min(max, min));

      assertEquals(max, ordering.max(shuffledList));
      assertEquals(max, ordering.max(shuffledList.iterator()));

      assertEquals(min, ordering.min(shuffledList));
      assertEquals(min, ordering.min(shuffledList.iterator()));
      assertEquals(min, ordering.min(first, second, third, rest));
      assertEquals(min, ordering.min(min, max));
      assertEquals(min, ordering.min(max, min));

      assertEquals(max, ordering.max(shuffledList));
      assertEquals(max, ordering.max(shuffledList.iterator()));

    assertEquals(Object.class, TypeToken.of(Object[].class).getComponentType().getType());
    assertEquals(Object[].class, TypeToken.of(Object[][].class).getComponentType().getType());
    assertEquals(char.class, TypeToken.of(char[].class).getComponentType().getType());
    assertEquals(char[].class, TypeToken.of(char[][].class).getComponentType().getType());

    assertEquals(
        "1:2:3:4:5:6:7:8", InetAddresses.toAddrString(InetAddresses.forString("1:2:3:4:5:6:7:8")));
    assertEquals(
        "2001:0:0:4::8", InetAddresses.toAddrString(InetAddresses.forString("2001:0:0:4:0:0:0:8")));
    assertEquals(
        "2001::4:5:6:7:8",
        InetAddresses.toAddrString(InetAddresses.forString("2001:0:0:4:5:6:7:8")));
    assertEquals(
        "2001:0:3:4:5:6:7:8",

  public void testToString() {
    // With ports.
    assertEquals("foo:101", "" + HostAndPort.fromString("foo:101"));
    assertEquals(":102", HostAndPort.fromString(":102").toString());
    assertEquals("[1::2]:103", HostAndPort.fromParts("1::2", 103).toString());
    assertEquals("[::1]:104", HostAndPort.fromString("[::1]:104").toString());

    // Without ports.
    assertEquals("foo", "" + HostAndPort.fromString("foo"));

    assertEquals("", MoreFiles.getFileExtension(root()));
    assertEquals("", MoreFiles.getFileExtension(FS.getPath(".")));
    assertEquals("", MoreFiles.getFileExtension(FS.getPath("..")));
    assertEquals("", MoreFiles.getFileExtension(FS.getPath("...")));
    assertEquals("", MoreFiles.getFileExtension(FS.getPath("blah")));
    assertEquals("", MoreFiles.getFileExtension(FS.getPath("blah.")));