1. non-simplify mode:
```
dubbo://120.0.0.1:20880/org.apache.dubbo.demo.DemoService?key=value
```
the store path of ZK will be: `/dubbo/porg.apache.dubbo.demo.DemoService/url`

2. simplify mode:
```
dubbo://120.0.0.1:20880/org.apache.dubbo.demo.DemoService?key=value
```
the store path of ZK will be: `/dubbo/porg.apache.dubbo.demo.DemoService/url`

3. simplify mode with path specified:
```
dubbo://120.0.0.1:20880/path-value?key=value
```
the store path of ZK will be: `/dubbo/path-value/url`
public void testUniqueServiceName() throws Exception {
        ServiceBuilder<Greeting> builder = new ServiceBuilder<>();
        builder.group("dubbo").interfaceClass(Greeting.class).version("1.0.0");
        ServiceConfig<Greeting> service = builder.build();
        assertThat(service.getUniqueServiceName(), equalTo("dubbo/" + Greeting.class.getName() + ":1.0.0"));
    }
    @Test
    void path() {
        ServiceBuilder builder = new ServiceBuilder();
        builder.path("path");
        Assertions.assertEquals("path", builder.build().getPath());
    }
    @Test
    void addMethod() {
        MethodConfig method = new MethodConfig();
        ServiceBuilder builder = new ServiceBuilder();
        builder.addMethod(method);
        Assertions.assertTrue(builder.build().getMethods().contains(method));
        Assertions.assertEquals(1, builder.build().getMethods().size());
    }
    @Test
    void addMethods() {
        MethodConfig method = new MethodConfig();
        ServiceBuilder builder = new ServiceBuilder();
        builder.addMethods(Collections.singletonList(method));
        Assertions.assertTrue(builder.build().getMethods().contains(method));
        Assertions.assertEquals(1, builder.build().getMethods().size());
    }
    @Test
    void provider() {