assertNotNull(negativeProvider);
    }

    // Test getTimeAdjustTimeMillis string values
    @Test
    public void test_getTimeAdjustTimeMillis_stringValues() {
        // Test various string formats
        String[] testValues = { "0", "1000", "-1000", "999999999", "-999999999", "1", "-1" };

        for (String value : testValues) {