CIFSContext secondInstance = SingletonContext.getInstance();
        assertSame(firstInstance, secondInstance);
    }

    @Test
    void testRegisterSmbURLHandlerWhenPkgsIsNull() {
        // Test registerSmbURLHandler when java.protocol.handler.pkgs is null
        System.clearProperty("java.protocol.handler.pkgs");
        SingletonContext.registerSmbURLHandler();