* Returns {@link ChecksumAlgorithm} for given algorithm name, or throws if algorithm not supported.
     *
     * @throws ChecksumAlgorithmServiceException if asked algorithm name is not supported.
     * @throws NullPointerException if passed in name is {@code null}.
     */
    @Nonnull
    ChecksumAlgorithm select(@Nonnull String algorithmName);

    /**

public enum MapFeature implements Feature<Map> {
  /**
   * The map does not throw {@code NullPointerException} on calls such as {@code containsKey(null)},
   * {@code get(null)}, {@code keySet().contains(null)} or {@code remove(null)}.
   */
  ALLOWS_NULL_KEY_QUERIES,
  ALLOWS_NULL_KEYS(ALLOWS_NULL_KEY_QUERIES),
  /**
   * The map does not throw {@code NullPointerException} on calls such as {@code

        String testString = null;

        // Expect a NullPointerException due to null string
        assertThrows(NullPointerException.class, () -> {
            pacString.check(testString);
        }, "A NullPointerException should be thrown for a null string with non-zero pointer.");
    }

  public void testReplace_presentNullValueUnsupported() {
    assertThrows(NullPointerException.class, () -> getMap().replace(k0(), null));
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUE_QUERIES)
  public void testReplace_absentNullValueUnsupported() {
    try {
      getMap().replace(k3(), null);
    } catch (NullPointerException tolerated) {
      // permitted not to throw because it would be a no-op

        result.addFailure(new RuntimeException("RuntimeException"));
        result.addFailure(new IllegalStateException("IllegalStateException"));
        result.addFailure(new NullPointerException("NullPointerException"));

        assertEquals(4, result.getFailures().size());
        assertTrue(result.getFailures().get(0) instanceof Exception);
        assertTrue(result.getFailures().get(1) instanceof RuntimeException);

        ByteEncodable encodable = new ByteEncodable(null, 0, 0);
        byte[] dest = new byte[1];

        // Expect NullPointerException from System.arraycopy
        assertThrows(NullPointerException.class, () -> {
            encodable.encode(dest, 0);
        }, "Should throw NullPointerException if source array is null");
    }

    @Test
    void testEncodeNullDestinationArray() {

                "The exception should be either PACDecodingException or NullPointerException.");

        if (exception instanceof PACDecodingException) {
            assertEquals("Malformed kerberos ticket", exception.getMessage(), "PAC exception should indicate malformed ticket.");
        } else if (exception instanceof NullPointerException) {
            // Empty input causes null ASN1 object, which is expected behavior

    /**
     * Ensure encode throws NPE when passed a null buffer.
     */
    @Test
    @DisplayName("Encode with null buffer throws NullPointerException")
    public void testEncodeNullBuffer() throws NdrException {
        NdrHyper hyper = new NdrHyper(5L);
        assertThrows(NullPointerException.class, () -> hyper.encode(null));
    }

    /**
     * Ensure decode throws NPE when passed a null buffer.
     */
    @Test

   * the call to {@code contains(null)} is permitted to throw a {@code NullPointerException}.
   *
   * @param message message to use upon assertion failure
   */
  protected void expectNullKeyMissingWhenNullKeysUnsupported(String message) {
    try {
      assertFalse(message, getMap().containsKey(null));
    } catch (NullPointerException tolerated) {
      // Tolerated
    }
  }

  /**

                new ClUnsupportedOperationException("hoge", new NullPointerException());
        assertThat(clUnsupportedOperationException.getMessage(), is("hoge"));
        assertThat(clUnsupportedOperationException.getCause(), instanceOf(NullPointerException.class));
    }

    /**
     * Test method for