* @return A function that applies each function in the collection in order until a non-null result is found.
     *         If all functions return null, the composite function returns null.
     *
     * @throws NullPointerException if the input collection is null or contains null elements.
     */
    static UnaryOperator<String> chain(Collection<? extends UnaryOperator<String>> functions) {
        return s -> {

   *
   * @param rowKeys row keys that may be stored in the generated table
   * @param columnKeys column keys that may be stored in the generated table
   * @throws NullPointerException if any of the provided keys is null
   * @throws IllegalArgumentException if {@code rowKeys} or {@code columnKeys} contains duplicates
   *     or if exactly one of {@code rowKeys} or {@code columnKeys} is empty.
   */

        this.connection.setReadTimeout(timeout);
    }

    @Override
    public void setRequestProperty(final String key, final String value) {
        if (key == null) {
            throw new NullPointerException();
        }
        final List<String> values = new ArrayList<>();
        values.add(value);
        boolean found = false;

        @DisplayName("Should handle null file ID during write")
        void testWriteWithNullFileId() {
            request.setFileId(null);
            byte[] buffer = new byte[256];

            assertThrows(NullPointerException.class, () -> request.writeBytesWireFormat(buffer, 0));
        }

        @Test
        @DisplayName("Should handle file ID of different sizes")
        void testWriteWithDifferentFileIdSizes() {

    void getters_withoutTree_throwNPE(String name, org.junit.jupiter.api.function.Executable call) {
        // Each call is invalid without a held tree and should throw NPE
        assertThrows(NullPointerException.class, call);
    }

    static java.util.stream.Stream<Arguments> wrapExceptions() {
        CIFSContext ctx = mock(CIFSContext.class);

            // when authority is null. This is a known issue in the legacy implementation.
            // For now, we expect the NPE to maintain backward compatibility
            assertThrows(NullPointerException.class, () -> new SmbFile("smb1://").getParent());
        }

        @Test
        public void testGetPath() throws MalformedURLException {
            // Path should be the original, uncanonicalized URL

        // Set up an expired cache entry
        Dfs.CacheEntry expiredEntry = new Dfs.CacheEntry(-1); // Expired
        testDfs._domains = expiredEntry;
        testDfs.setDisabled(true); // Set disabled to avoid NullPointerException

        when(auth.getDomain()).thenReturn("domain.com");

        assertNull(testDfs.getTrustedDomains(auth));
    }

    @Test

   *
   * @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<Double>} before 12.0)
   */
  public static double[] toArray(Collection<? extends Number> collection) {

## Version 3.14.4

_2019-09-29_

 *  Fix: Cancel calls that fail due to unexpected exceptions. We had a bug where an enqueued call
    would never call back if it crashed with an unchecked throwable, such as a
    `NullPointerException` or `OutOfMemoryError`. We now call `Callback.onFailure()` with an
    `IOException` that reports the call as canceled. The triggering exception is still delivered to
    the thread's `UncaughtExceptionHandler`.

        when(mockHealthResponse.isTimedOut()).thenReturn(false);
        when(mockFuture.actionGet(anyLong(), any(TimeUnit.class))).thenReturn(mockHealthResponse);

        // Should not throw NullPointerException
        try {
            // Note: We can't easily test connect() fully without mocking createClient()
            // This test verifies the null check logic indirectly