assertEquals("********", SystemUtil.maskSensitiveValue("Password", "secret"));
        assertEquals("********", SystemUtil.maskSensitiveValue("PaSsWoRd", "secret"));
    }

    @Test
    public void test_maskSensitiveValue_emptyValue() {
        assertEquals("********", SystemUtil.maskSensitiveValue("PASSWORD", ""));
        assertEquals("", SystemUtil.maskSensitiveValue("HOST", ""));
    }