assertTrue(ex.getMessage().contains("directory must end with '/'"));
        verify(tree, times(1)).acquire();
        verify(tree, times(1)).release(); // closed after failure
    }

    @Test
    @DisplayName("open(): invalid UNC without trailing backslash throws SmbException")
    void invalidUncThrows() throws Exception {
        // Override the default setup for this specific test

            SmbFile dest = mock(SmbFile.class);
            CIFSContext ctx = ctxWithIgnore(false);
            when(src.getContext()).thenReturn(ctx);

            // Force failure before any stream construction
            when(src.openUnshared(anyInt(), anyInt(), anyInt(), anyInt(), anyInt())).thenThrow(new SmbException("boom"));

        verify(transport).ensureConnected();
    }

    // Error case: ensureConnected throws IOException
    @Test
    @DisplayName("ensureConnected throws IOException on failure")
    void ensureConnected_throwsIOException() throws Exception {
        doThrow(new java.io.IOException("connect failed")).when(transport).ensureConnected();

# Application Exception
# ---------------------
# /- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure = Logowanie nie powiodło się.
errors.app.illegal.transition = Nieprawidłowe przejście. Spróbuj ponownie.
errors.app.db.already.deleted = Mogło zostać już usunięte przez inny proces. Spróbuj ponownie.

        return;
      }

      oldRunCount = workerRunCount;

      // If the worker is not yet running, the delegate Executor might reject our attempt to start
      // it. To preserve FIFO order and failure atomicity of rejected execution when the same
      // Runnable is executed more than once, allocate a wrapper that we know is safe to remove by
      // object identity.

        return;
      }

      oldRunCount = workerRunCount;

      // If the worker is not yet running, the delegate Executor might reject our attempt to start
      // it. To preserve FIFO order and failure atomicity of rejected execution when the same
      // Runnable is executed more than once, allocate a wrapper that we know is safe to remove by
      // object identity.

		Recursive: false,
		Immediate: false,
	})
	if err != nil {
		t.Errorf("Failure during deleting part.1 - %v", err)
	}

	err = firstDisk.WriteAll(t.Context(), bucket, pathJoin(object, fi.DataDir, "part.1"), []byte{})
	if err != nil {
		t.Errorf("Failure during creating part.1 - %v", err)
	}

        PreauthIntegrityContext context = preauthService.initializeSession(sessionId, salt, PreauthIntegrityService.HASH_ALGO_SHA512);
        assertTrue(context.isValid());

        // Simulate validation failure (context should be invalidated)
        byte[] incorrectHash = new byte[64];
        secureRandom.nextBytes(incorrectHash);

        try {
            preauthService.validatePreauthIntegrity(sessionId, incorrectHash);

          }
        };
    AssertionError actual = null;
    try {
      tester.test();
    } catch (AssertionError e) {
      actual = e;
    }
    assertNotNull("verify() should be able to cause test failure", actual);
    assertTrue(
        "AssertionError should have info about why test failed",
        actual.getCause().getMessage().contains(message));
  }

  public void testMissingException() {

# Application Exception
# ---------------------
# /- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure = Oturum açma başarısız oldu.
errors.app.illegal.transition = Geçersiz geçiş. Lütfen tekrar deneyin.
errors.app.db.already.deleted = Başka bir işlem tarafından silinmiş olabilir. Lütfen tekrar deneyin.