public static void assertMapEntryIsUnmodifiable(Entry<?, ?> entry) {
    try {
      // fine because the call is going to fail without modifying the entry
      @SuppressWarnings("unchecked")
      Entry<?, @Nullable Object> nullableValueEntry = (Entry<?, @Nullable Object>) entry;
      nullableValueEntry.setValue(null);
      fail("setValue on unmodifiable Map.Entry succeeded");
    } catch (UnsupportedOperationException expected) {
    }
  }

  public static void assertMapEntryIsUnmodifiable(Entry<?, ?> entry) {
    try {
      // fine because the call is going to fail without modifying the entry
      @SuppressWarnings("unchecked")
      Entry<?, @Nullable Object> nullableValueEntry = (Entry<?, @Nullable Object>) entry;
      nullableValueEntry.setValue(null);
      fail("setValue on unmodifiable Map.Entry succeeded");
    } catch (UnsupportedOperationException expected) {
    }
  }

      Preconditions.checkArgument(false);
      fail("no exception thrown");
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testCheckArgument_simpleMessage_success() {
    Preconditions.checkArgument(true, IGNORE_ME);
  }

  public void testCheckArgument_simpleMessage_failure() {
    try {
      Preconditions.checkArgument(false, new Message());
      fail("no exception thrown");

      equalsTester.addEqualityGroup((Object) null);
      fail("Should fail on null reference");
    } catch (NullPointerException e) {
    }
  }

  /** Test equalObjects after adding multiple instances at once with a null */
  public void testAddTwoEqualObjectsAtOnceWithNull() {
    try {
      equalsTester.addEqualityGroup(reference, equalObject1, null);
      fail("Should fail on null equal object");
    } catch (NullPointerException e) {

      getList().add(0, e3());
      iterator.next();
      fail("Expected ConcurrentModificationException");
    } catch (ConcurrentModificationException expected) {
      // success
    }
  }

  @ListFeature.Require(absent = SUPPORTS_ADD_WITH_INDEX)
  public void testAddAtIndex_unsupportedNotPresent() {
    try {
      getList().add(0, e3());
      fail("add(n, notPresent) should throw");

    try {
      iter.peek();
      fail("peek() should throw NoSuchElementException at end");
    } catch (NoSuchElementException expected) {
    }

    try {
      iter.peek();
      fail("peek() should continue to throw NoSuchElementException at end");
    } catch (NoSuchElementException expected) {
    }

    try {
      iter.next();
      fail("next() should throw NoSuchElementException as usual");

    future.cancel(true);
    try {
      getUnchecked(future);
      fail();
    } catch (CancellationException expected) {
    }
  }

  public void testGetUnchecked_ExecutionExceptionChecked() {
    try {
      getUnchecked(FAILED_FUTURE_CHECKED_EXCEPTION);
      fail();
    } catch (UncheckedExecutionException expected) {
      assertEquals(CHECKED_EXCEPTION, expected.getCause());

      range.lowerEndpoint();
      fail();
    } catch (IllegalStateException expected) {
    }
    try {
      range.lowerBoundType();
      fail();
    } catch (IllegalStateException expected) {
    }
  }

  private static void assertUnboundedAbove(Range<Integer> range) {
    assertFalse(range.hasUpperBound());
    try {
      range.upperEndpoint();
      fail();

      range.lowerEndpoint();
      fail();
    } catch (IllegalStateException expected) {
    }
    try {
      range.lowerBoundType();
      fail();
    } catch (IllegalStateException expected) {
    }
  }

  private static void assertUnboundedAbove(Range<Integer> range) {
    assertFalse(range.hasUpperBound());
    try {
      range.upperEndpoint();
      fail();

    try {
      builder.add((String) null);
      fail("expected NullPointerException");
    } catch (NullPointerException expected) {
    }

    try {
      builder.add((String[]) null);
      fail("expected NullPointerException");
    } catch (NullPointerException expected) {
    }

    try {
      builder.add("a", null, "b");
      fail("expected NullPointerException");