try {
      iterator.next();
      fail("no exception thrown");
    } catch (NoSuchElementException expected) {
    }
    try {
      iterator.previous();
      fail("no exception thrown");
    } catch (NoSuchElementException expected) {
    }
    try {
      iterator.remove();
      fail("no exception thrown");
    } catch (UnsupportedOperationException expected) {
    }

  public void testCopyOf_nullArray() {
    try {
      copyOf((String[]) null);
      fail();
    } catch (NullPointerException expected) {
    }
  }

  public void testCopyOf_arrayContainingOnlyNull() {
    @Nullable String[] array = new @Nullable String[] {null};
    try {
      copyOf((String[]) array);
      fail();
    } catch (NullPointerException expected) {
    }
  }

  public void testCopyOf_nullArray() {
    try {
      copyOf((String[]) null);
      fail();
    } catch (NullPointerException expected) {
    }
  }

  public void testCopyOf_arrayContainingOnlyNull() {
    @Nullable String[] array = new @Nullable String[] {null};
    try {
      copyOf((String[]) array);
      fail();
    } catch (NullPointerException expected) {
    }
  }

    try {
      ImmutableSortedMap.of(n, 1);
      fail();
    } catch (NullPointerException expected) {
    }

    try {
      ImmutableSortedMap.of("one", 1, null, 2);
      fail();
    } catch (NullPointerException expected) {
    }
  }

  public void testOfNullValue() {
    try {
      ImmutableSortedMap.of("one", null);
      fail();
    } catch (NullPointerException expected) {
    }

      fail();
    } catch (IllegalArgumentException expected) {
    }

    try {
      Set<Set<Integer>> unused = powerSet(ContiguousSet.closed(0, Integer.MAX_VALUE / 2));
      fail();
    } catch (IllegalArgumentException expected) {
    }

    try {
      powerSet(singleton(null));
      fail();
    } catch (NullPointerException expected) {
    }
  }

    try {
      builder.put(null, 1);
      fail();
    } catch (NullPointerException expected) {
    }
    try {
      builder.putAll(null, Arrays.asList(1, 2, 3));
      fail();
    } catch (NullPointerException expected) {
    }
    try {
      builder.putAll(null, 1, 2, 3);
      fail();
    } catch (NullPointerException expected) {
    }
    try {

    try {
      builder.put(null, 1);
      fail();
    } catch (NullPointerException expected) {
    }
    try {
      builder.putAll(null, Arrays.asList(1, 2, 3));
      fail();
    } catch (NullPointerException expected) {
    }
    try {
      builder.putAll(null, 1, 2, 3);
      fail();
    } catch (NullPointerException expected) {
    }
    try {

    } catch (PermittedMetaException e) {
      referenceException = e;
    } catch (UnknownElementException e) {
      Helpers.fail(e, e.getMessage());
    }

    if (referenceException == null) {
      if (targetException != null) {
        Helpers.fail(targetException, "Target threw exception when reference did not");
      }

      /*

    if (spliterator.estimateSize() > originalSize) {
      fail(
          format(
              "estimated size of spliterator after trySplit (%s) is larger than original size (%s)",
              spliterator.estimateSize(), originalSize));
    }
    if (trySplit != null) {
      if (trySplit.estimateSize() > originalSize) {
        fail(
            format(

    /**
     * Associates {@code key} with {@code value} in the built map. Duplicate keys, according to the
     * comparator (which might be the keys' natural order), are not allowed, and will cause {@link
     * #build} to fail.
     */
    @CanIgnoreReturnValue
    @Override
    public Builder<K, V> put(K key, V value) {
      ensureCapacity(size + 1);
      checkEntryNotNull(key, value);
      keys[size] = key;