// Arrange
        SmbFile dest = mock(SmbFile.class);
        SmbFileHandleImpl handle = mock(SmbFileHandleImpl.class);
        SmbAuthException authEx = new SmbAuthException("denied");

        when(dest.openUnshared(anyInt(), anyInt(), anyInt(), anyInt(), anyInt())).thenThrow(authEx) // first attempt fails with auth
                .thenReturn(handle); // second attempt succeeds

        // dest currently has READONLY attribute set

    public void testAutoCloseableImpl() {
        String testPassword = "AutoCloseablePass123!";
        NtlmPasswordAuthenticator authRef;

        // Use try-with-resources
        try (NtlmPasswordAuthenticator auth = new NtlmPasswordAuthenticator("user", testPassword)) {
            authRef = auth;
            assertEquals(testPassword, auth.getPassword());
            assertFalse(auth.isClosed());
        }