2.7.0版本getContextPath方法：
```
protected String getContextPath(URL url) {
        String contextPath = url.getPath();
        return contextPath.endsWith("/") ? contextPath.substring(0,contextPath.length()-1) : contextPath;
    }
```
无法将方法置入web容器中，退回2.6.5版本的方法：
```
protected String getContextPath(URL url) {
        int pos = url.getPath().lastIndexOf("/");
        return pos > 0 ? url.getPath().substring(0, pos) : "";
    }
```
使用正常，两个方法应该不等价的。
public void testGeneric2() throws Exception {
        Assertions.assertThrows(IllegalArgumentException.class, () -> {
            ServiceConfig service = new ServiceConfig();
            service.setGeneric("illegal");
        });
    }
    @Test
    public void testMock() throws Exception {
        Assertions.assertThrows(IllegalArgumentException.class, () -> {
            ServiceConfig service = new ServiceConfig();
            service.setMock("true");
        });
    }
    @Test
    public void testMock2() throws Exception {
        Assertions.assertThrows(IllegalArgumentException.class, () -> {
            ServiceConfig service = new ServiceConfig();
            service.setMock(true);
        });
    }
    @Test
    public void testUniqueServiceName() throws Exception {
        ServiceConfig<Greeting> service = new ServiceConfig<Greeting>();
        service.setGroup("dubbo");
        service.setInterface(Greeting.class);
        service.setVersion("1.0.0");
        assertThat(service.getUniqueServiceName(), equalTo("dubbo/" + Greeting.class.getName() + ":1.0.0"));
    }
}