when(mockCredentials.getUserDomain()).thenReturn(null);
        assertFalse(dfsImpl.isTrustedDomain(mockContext, "anydomain.com"));
    }

    @Test
    void testIsTrustedDomain_ConnectionFails() throws SmbAuthException {
        // Scenario: Transport connection fails
        when(mockCredentials.getUserDomain()).thenReturn("authdomain.com");
        // When transport fails, it should return false