TestLocking t = new TestLocking();
        assertNotNull(t, "TestLocking instance should not be null");
    }

    @Test
    @DisplayName("Field values are independent across instances")
    void testIndependentInstances() {
        TestLocking t1 = new TestLocking();
        TestLocking t2 = new TestLocking();

        // Set different values
        t1.numThreads = 2;
        t1.url = "smb://server1/share/file.txt";