public static void checkContextPath(String contextPath) {
        if (contextPath == null) {
            return;
        }
        Matcher matcher = CONTEXT_PATH_MATCH.matcher(contextPath);
        if (matcher.find()) {
            throw new IllegalArgumentException("Illegal url path expression");
        }
    }
@Test
    void testContextPathIllegal1() {
        assertThrows(IllegalArgumentException.class, () -> {
            String contextPath1 = "//nacos/";
            ValidatorUtils.checkContextPath(contextPath1);
        });
    }