@Test
public void testMergeUrl() throws Exception {

    URL providerURL = URL.valueOf("dubbo://localhost:55555");
    providerURL = providerURL.setPath("path")
            .setUsername("username")
            .setPassword("password");
    providerURL = URLBuilder.from(providerURL)
            .addParameter(GROUP_KEY, "dubbo")
            .addParameter(VERSION_KEY, "1.2.3")
            .addParameter(DUBBO_VERSION_KEY, "2.3.7")
            .addParameter(THREADPOOL_KEY, "fixed")
            .addParameter(THREADS_KEY, Integer.MAX_VALUE)
            .addParameter(THREAD_NAME_KEY, "test")
            .addParameter(CORE_THREADS_KEY, Integer.MAX_VALUE)
            .addParameter(QUEUES_KEY, Integer.MAX_VALUE)
            .addParameter(ALIVE_KEY, Integer.MAX_VALUE)
            .addParameter(DEFAULT_KEY_PREFIX + THREADS_KEY, Integer.MAX_VALUE)
            .addParameter(DEFAULT_KEY_PREFIX + THREADPOOL_KEY, "fixed")
            .addParameter(DEFAULT_KEY_PREFIX + CORE_THREADS_KEY, Integer.MAX_VALUE)
            .addParameter(DEFAULT_KEY_PREFIX + QUEUES_KEY, Integer.MAX_VALUE)
            .addParameter(DEFAULT_KEY_PREFIX + ALIVE_KEY, Integer.MAX_VALUE)
            .addParameter(DEFAULT_KEY_PREFIX + THREAD_NAME_KEY, "test")
            .addParameter(APPLICATION_KEY, "provider")
            .addParameter(REFERENCE_FILTER_KEY, "filter1,filter2")
            .build();
    URL consumerURL = new URLBuilder(DUBBO_PROTOCOL, "localhost", 55555)
            .addParameter(PID_KEY, "1234")
            .addParameter(THREADPOOL_KEY, "foo")
            .addParameter(APPLICATION_KEY, "consumer")
            .addParameter(REFERENCE_FILTER_KEY, "filter3")
            .build();
    URL url = ClusterUtils.mergeUrl(providerURL, consumerURL.getParameters());
    Assertions.assertFalse(url.hasParameter(THREADS_KEY));
    Assertions.assertFalse(url.hasParameter(DEFAULT_KEY_PREFIX + THREADS_KEY));
    Assertions.assertFalse(url.hasParameter(DEFAULT_KEY_PREFIX + THREADPOOL_KEY));
    Assertions.assertFalse(url.hasParameter(CORE_THREADS_KEY));
    Assertions.assertFalse(url.hasParameter(DEFAULT_KEY_PREFIX + CORE_THREADS_KEY));
    Assertions.assertFalse(url.hasParameter(QUEUES_KEY));
    Assertions.assertFalse(url.hasParameter(DEFAULT_KEY_PREFIX + QUEUES_KEY));
    Assertions.assertFalse(url.hasParameter(ALIVE_KEY));
    Assertions.assertFalse(url.hasParameter(DEFAULT_KEY_PREFIX + ALIVE_KEY));
    Assertions.assertFalse(url.hasParameter(THREAD_NAME_KEY));
    Assertions.assertFalse(url.hasParameter(DEFAULT_KEY_PREFIX + THREAD_NAME_KEY));
    Assertions.assertEquals(url.getPath(), "path");
    Assertions.assertEquals(url.getUsername(), "username");
    Assertions.assertEquals(url.getPassword(), "password");
    Assertions.assertEquals(url.getParameter(PID_KEY), "1234");
    Assertions.assertEquals(url.getParameter(THREADPOOL_KEY), "foo");
    Assertions.assertEquals(url.getParameter(APPLICATION_KEY), "consumer");
    Assertions.assertEquals(url.getParameter(REMOTE_APPLICATION_KEY), "provider");
    Assertions.assertEquals(url.getParameter(REFERENCE_FILTER_KEY), "filter1,filter2,filter3");
}