try {
      presentAsSet.add("b");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
  }

  public void testAsSet_absentIsImmutable() {
    Set<Object> absentAsSet = Optional.absent().asSet();
    try {
      absentAsSet.add("foo");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
  }

    try {
      Ascii.truncate("foobar", 2, "...");
      fail();
    } catch (IllegalArgumentException expected) {
    }

    try {
      Ascii.truncate("foobar", 8, "1234567890");
      fail();
    } catch (IllegalArgumentException expected) {
    }

    try {
      Ascii.truncate("foobar", -1, "...");
      fail();
    } catch (IllegalArgumentException expected) {
    }

    try {

      base64().upperCase();
      fail();
    } catch (IllegalStateException expected) {
    }
  }

  public void testBase64CannotLowerCase() {
    try {
      base64().lowerCase();
      fail();
    } catch (IllegalStateException expected) {
    }
  }

  public void testBase64CannotIgnoreCase() {
    try {
      base64().ignoreCase();
      fail();

          assertGoodTesterAnnotation(asAnnotation(containedClass));
        } else {
          fail(
              rootLocaleFormat(
                  "Feature enum %s contains a class named "
                      + "'Require' but it is not an annotation.",
                  featureEnumClass));
        }
        return;
      }
    }
    fail(
        rootLocaleFormat(

    try {
      getMultiset().remove(e0(), -1);
      fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException expected) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemoveUnsupported() {
    try {
      getMultiset().remove(e0(), 2);
      fail("Expected UnsupportedOperationException");

    try {
      stopwatch.start();
      fail();
    } catch (IllegalStateException expected) {
    }
    assertTrue(stopwatch.isRunning());
  }

  public void testStop() {
    stopwatch.start();
    assertSame(stopwatch, stopwatch.stop());
    assertFalse(stopwatch.isRunning());
  }

  public void testStop_new() {
    try {
      stopwatch.stop();
      fail();
    } catch (IllegalStateException expected) {

    assertFalse(task.isDone());
    task.cancel(false);
    assertTrue(task.isDone());
    assertTrue(task.isCancelled());
    assertFalse(task.wasInterrupted());
    try {
      getDone(task);
      fail();
    } catch (CancellationException expected) {
    }
    verifyThreadWasNotInterrupted();
  }

  public void testFailed() throws Exception {
    final Exception e = new Exception();

    try {
      iia.get(-1);
      fail();
    } catch (IndexOutOfBoundsException expected) {
    }
    try {
      iia.get(3);
      fail();
    } catch (IndexOutOfBoundsException expected) {
    }

    iia = iia.subArray(1, 2);
    try {
      iia.get(-1);
      fail();
    } catch (IndexOutOfBoundsException expected) {
    }
  }

  public void testSetValue_valuePresent() {
    for (Entry<K, V> entry : getMap().entrySet()) {
      if (entry.getKey().equals(k0())) {
        try {
          entry.setValue(v1());
          fail("Expected IllegalArgumentException");
        } catch (IllegalArgumentException expected) {
        }
      }
    }
    expectUnchanged();
  }

  public void testPutAllNullValueNullLast_unsupported() {
    int size = getNumElements();

    try {
      multimap().putAll(k3(), Lists.newArrayList(v3(), null));
      fail();
    } catch (NullPointerException expected) {
    }

    Collection<V> values = multimap().get(k3());
    if (values.size() == 0) {
      expectUnchanged();