ms.add("b");
    ms.add("c");

    assertEquals(2, ms.count("bar"));
    assertEquals(3, ms.count("b"));

    Multiset<String> ms2 = TreeMultiset.create(DEGENERATE_COMPARATOR);

    ms2.add("cat", 2);
    ms2.add("x", 3);

    assertEquals(ms, ms2);
    assertEquals(ms2, ms);

    SortedSet<String> elementSet = ms.elementSet();
    assertEquals("a", elementSet.first());

     * --- fail(). (If the test were to pass, its output would be hidden.)
     * - Run the test.
     * - Pull the relevant lines of output from the test into a testcases file.
     * - Test the output:
     * --- cat testcases | while read L; do
     *       X=($L)
     *       A=$( cd /b/c && sudo mkdir -p ${X[0]} && cd ${X[0]} && pwd |
     *           sed -e 's#^//*#/#' )
     *       B=$( cd /b/c && cd ${X[1]} && pwd )

     * --- fail(). (If the test were to pass, its output would be hidden.)
     * - Run the test.
     * - Pull the relevant lines of output from the test into a testcases file.
     * - Test the output:
     * --- cat testcases | while read L; do
     *       X=($L)
     *       A=$( cd /b/c && sudo mkdir -p ${X[0]} && cd ${X[0]} && pwd |
     *           sed -e 's#^//*#/#' )
     *       B=$( cd /b/c && cd ${X[1]} && pwd )

    }
  }

  public void testForArrayWithPosition() {
    String[] array = {"foo", "bar", "cat"};
    Iterator<String> iterator = Iterators.forArrayWithPosition(array, 1);
    assertTrue(iterator.hasNext());
    assertEquals("bar", iterator.next());
    assertTrue(iterator.hasNext());
    assertEquals("cat", iterator.next());
    assertFalse(iterator.hasNext());
  }

    doTestTrimFrom("x-x-", "x-x");
    doTestTrimFrom("x-xx", "x-xx");
    doTestTrimFrom("x-x--xx---x----x", "x-x--xx---x----x");
    // additional testing using the doc example
    assertEquals("cat", anyOf("ab").trimFrom("abacatbab"));
  }

  private void doTestTrimFrom(String in, String out) {
    // Try a few different matchers which all match '-' and not 'x'
    assertEquals(out, is('-').trimFrom(in));

    doTestTrimFrom("x-x-", "x-x");
    doTestTrimFrom("x-xx", "x-xx");
    doTestTrimFrom("x-x--xx---x----x", "x-x--xx---x----x");
    // additional testing using the doc example
    assertEquals("cat", anyOf("ab").trimFrom("abacatbab"));
  }

  private void doTestTrimFrom(String in, String out) {
    // Try a few different matchers which all match '-' and not 'x'
    assertEquals(out, is('-').trimFrom(in));

poor animal's feelings.  `I quite forgot you didn't like cats.'

  `Not like cats!' cried the Mouse, in a shrill, passionate
voice.  `Would YOU like cats if you were me?'

  `Well, perhaps not,' said Alice in a soothing tone:  `don't be
angry about it.  And yet I wish I could show you our cat Dinah:
I think you'd take a fancy to cats if you could only see her.

   * the beginning and from the end of the string. For example:
   *
   * <pre>{@code
   * CharMatcher.anyOf("ab").trimFrom("abacatbab")
   * }</pre>
   *
   * ... returns {@code "cat"}.
   *
   * <p>Note that:
   *
   * <pre>{@code
   * CharMatcher.inRange('\0', ' ').trimFrom(str)
   * }</pre>
   *
   * ... is equivalent to {@link String#trim()}.
   */

    unfiltered.put("apple", 2);
    unfiltered.put("banana", 6);
    unfiltered.put("cat", 3);
    unfiltered.put("dog", 5);

    SortedMap<String, Integer> filtered = Maps.filterEntries(unfiltered, CORRECT_LENGTH);
    assertEquals("banana", filtered.firstKey());
    assertEquals("cat", filtered.lastKey());
  }

  public void testHeadSubTailMap_FilteredMap() {

    assertThat(m.keySet()).containsExactly("boy", "girl", "cat", "dog").inOrder();
    assertThat(m)
        .isEqualTo(ImmutableMap.of("boy", "tom", "girl", "tina", "cat", "kitty", "dog", "tommy"));

    // try in a different order
    m = COMMA_SPLITTER.withKeyValueSeparator(":").split("girl:tina,boy:tom,dog:tommy,cat:kitty");