@Override
    protected Mono<Void> handleRuleIfNull(final String pluginName, final ServerWebExchange exchange, final ShenyuPluginChain chain) {
        return WebFluxResultUtils.noRuleResult(pluginName, exchange);
    }
@Test
    public void handleRuleIfNullTest() {
        assertNotNull(dividePlugin.handleRuleIfNull(PluginEnum.DIVIDE.getName(), exchange, chain));
    }