}
      }
    }
  }

  public void testToArray_withNull() {
    List<@Nullable Double> list = Arrays.asList(0.0, 1.0, null);
    assertThrows(NullPointerException.class, () -> Doubles.toArray(list));
  }

  public void testToArray_withConversion() {
    double[] array = {0.0, 1.0, 2.0};

    List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2);

    public void test_hook_withNullAssistantDirector() {
        // Hook should handle null parameter gracefully
        curtainFinallyHook.hook(null);

        // Verify no NullPointerException is thrown
        assertTrue(true);
    }

    // Mock class for testing exception scenarios
    private static class MockMultiThreadedHttpConnectionManager {
        public static void shutdownAll() {

            private static final long serialVersionUID = 1L;

            @Override
            public String get(String key) {
                // Override to return empty string instead of null to avoid NullPointerException
                return "";
            }

            @Override
            public String getIndexFieldTitle() {
                return "title";
            }

            @Override

     * inside or outside the 'safe' range.
     *
     * @param c the character to be replaced
     * @param replacement the string to replace the given character
     * @return the builder instance
     * @throws NullPointerException if {@code replacement} is null
     */
    @CanIgnoreReturnValue
    public Builder addEscape(char c, String replacement) {
      checkNotNull(replacement);

    void openCopyTargetFile_nullDest_throwsNPE() {
        // Arrange
        SmbFile dest = null;

        // Act + Assert
        assertThrows(NullPointerException.class, () -> SmbCopyUtil.openCopyTargetFile(dest, SmbConstants.ATTR_NORMAL, false));
    }

    // --- Tests for copyFile exception handling branch ---

    @Nested
    class CopyFileExceptions {

    internal var resolvePrivateAddresses = false
    internal var resolvePublicAddresses = true

    fun build(): DnsOverHttps {
      val client = this.client ?: throw NullPointerException("client not set")
      return DnsOverHttps(
        client.newBuilder().dns(buildBootstrapClient(this)).build(),
        checkNotNull(url) { "url not set" },
        includeIPv6,
        post,

        // Then - should not throw during construction
        assertNotNull(reqWithNull);

        // But should throw when trying to use the null path
        assertThrows(NullPointerException.class, () -> {
            reqWithNull.size();
        });
    }

    @Test
    @DisplayName("Should write consistent structure at different offsets")

    assertEquals(7, (int) map.getInstance(TypeToken.of(Integer.class)));

    // Won't compile: map.putInstance(Double.class, new Long(42));
  }

  public void testNull() {
    assertThrows(
        NullPointerException.class,
        () -> map.putInstance((TypeToken<Integer>) null, Integer.valueOf(1)));
    map.putInstance(Integer.class, null);
    assertTrue(map.containsKey(TypeToken.of(Integer.class)));

   *
   * @param collection a collection of {@code Character} objects
   * @return an array containing the same values as {@code collection}, in the same order, converted
   *     to primitives
   * @throws NullPointerException if {@code collection} or any of its elements is null
   */
  public static char[] toArray(Collection<Character> collection) {
    if (collection instanceof CharArrayAsList) {

   *
   * @param collection a collection of {@code Number} instances
   * @return an array containing the same values as {@code collection}, in the same order, converted
   *     to primitives
   * @throws NullPointerException if {@code collection} or any of its elements is null
   * @since 1.0 (parameter was {@code Collection<Short>} before 12.0)
   */
  public static short[] toArray(Collection<? extends Number> collection) {