### Question:
Application { public void setServerGroup(String serverGroup) { this.serverGroup = serverGroup; } Application();  Application(List<String> registryUrlList, String serverGroup);  Application(List<String> registryUrlList, ProviderInfo providerInfo, String serverGroup); String getServerGroup(); void setServerGroup(String serverGroup); List<String> getRegistryUrlList(); void setRegistryUrlList(List<String> registryUrlList); ProviderInfo getProviderInfo(); void setProviderInfo(ProviderInfo providerInfo);  }### Answer:
@Test public void setServerGroup() throws Exception { Application application = new Application(); String group = "g"; application.setServerGroup(group); assertEquals(group, application.getServerGroup()); }