// getFormat checks that the block is a valid tar header based on the checksum.
// It then attempts to guess the specific format based on magic values.
// If the checksum fails, then FormatUnknown is returned.
func (b *block) getFormat() Format {
	// Verify checksum.
	var p parser
	value := p.parseOctal(b.toV7().chksum())
	chksum1, chksum2 := b.computeChecksum()

 *   <li>comparing each pair of objects from different equality groups returns false
 *   <li>the hash codes of any two equal objects are equal
 * </ul>
 *
 * <p>When a test fails, the error message labels the objects involved in the failed comparison as
 * follows:
 *
 * <ul>
 *   <li>"{@code [group }<i>i</i>{@code , item }<i>j</i>{@code ]}" refers to the

        verify(handle, times(1)).ensureDFSResolved();
        verifyNoMoreInteractions(handle);
    }

    @Test
    @DisplayName("ensureDFSResolved(): throws CIFSException when underlying call fails")
    void ensureDFSResolved_throws() throws Exception {
        // Arrange: configure the mock to throw
        doThrow(new CIFSException("DFS resolution failed")).when(handle).ensureDFSResolved();

                if (logger.isDebugEnabled()) {
                    logger.debug("Silent token refresh failed: {}", e.getMessage());
                }
            }
            // For MSAL4J, if silent refresh fails, return true if token is still valid
            // Actual refresh will happen during next authentication request
            return true;
        }

        /**
         * Gets the Azure AD authentication result.

  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemove_occurrences_unsupported_absent() {
    // notice: we don't care whether it succeeds, or fails with UOE
    try {
      assertEquals(
          "multiset.remove(absent, 2) didn't return 0 or throw an exception",
          0,
          getMultiset().remove(e3(), 2));

  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemove_occurrences_unsupported_absent() {
    // notice: we don't care whether it succeeds, or fails with UOE
    try {
      assertEquals(
          "multiset.remove(absent, 2) didn't return 0 or throw an exception",
          0,
          getMultiset().remove(e3(), 2));

        UnsupportedOperationException.class,
        () -> collection.removeAll(MinimalCollection.of(e0())));
    expectUnchanged();
    assertTrue(collection.contains(e0()));
  }

  /*
   * AbstractCollection fails the removeAll(null) test when the subject
   * collection is empty, but we'd still like to test removeAll(null) when we
   * can. We split the test into empty and non-empty cases. This allows us to
   * suppress only the former.

        setMechanismListMIC(mechanismListMIC);
    }

    /**
     * Constructs a NegTokenTarg by parsing the provided token bytes
     * @param token the SPNEGO token bytes to parse
     * @throws IOException if parsing fails
     */
    public NegTokenTarg(final byte[] token) throws IOException {
        parse(token);
    }

    /**
     * Gets the negotiation result code
     * @return the result code
     */

        verifyNoMoreInteractions(locator);
    }

    // Error path: overlaps may throw a CIFSException per signature
    @Test
    @DisplayName("overlaps throws CIFSException when implementation fails")
    void overlapsThrowsCifsException() throws Exception {
        when(locator.overlaps(any())).thenThrow(new CIFSException("Simulated failure"));

        assertFalse(channelManager.isUseMultiChannel());

        try {
            channelManager.initializeMultiChannel();
            // Should not throw exception even if initialization fails
        } catch (Exception e) {
            // Expected in test environment without proper server setup
        }

        assertDoesNotThrow(() -> channelManager.shutdown());
    }

    @Test