@Test
    @Order(4)
    public void findUpstreamListBySelectorIdTest() {
        final UpstreamCacheManager upstreamCacheManager = UpstreamCacheManager.getInstance();
        Assertions.assertNull(upstreamCacheManager.findUpstreamListBySelectorId(SELECTOR_ID));
    }
The type UpstreamCacheManager check task test.
shenyu-loadbalancer/src/test/java/org/apache/shenyu/loadbalancer/cache/UpstreamCacheManagerTest.java