Java 服务器端 UnitTest GCM 的结果

Question

我正在使用GCM（Google Cloud Messaging）向Android应用程序发送通知。我的服务器正在使用谷歌提供的gcm-server.jar，我正在遵循文档。我可以毫无问题地向设备发送通知。

现在我正在尝试根据从PushNotificationDaoGcmImpl的私有方法sendNotificationToServer返回的Result（源）对业务逻辑进行单元测试。

我知道Result不能被嘲笑，因为它是一个final类，并且简单地将其实例化为new Result()是行不通的，因为没有公共构造函数。Result内部Builder类在package com.google.android.gcm.server;外部无法访问，因此我无法以这种方式构建对象。

我没有找到一个好的方法来创建一个Result这是从Sender（源）返回的内容。

我的问题是我将如何进行单元测试，PushNotificationDaoGcmImpl根据Result处理某些条件？

public class PushNotificationDaoGcmImpl{
    //method I'm trying to test
    public void sendPushNotification(){
        // builds message to send
        Result result = this.sendNotificationToServer(gcmMessage, deviceToken)
        //handle result's error conditions
    }
    //method call I'm trying to mock
    private Result sendNotificationToServer(Message gcmMessage, String deviceToken){
        return gcmSender.send(gcmMessage, deviceToken, 1);
    }
}   
//test snipet
@Test
public void testSendNotificationToServer () throws Exception {
    Result result = new Result();
    PushNotificationMessage message = new PushNotificationMessage("123", "Test", "deviceToken", "Android");
    //Having issue with how to handle Result here
    doReturn(result).when(gcmPushNotificationDaoSpy).sendNotificationToServer(any(Message.class), anyString());
    PushNotificationResult result = gcmPushNotificationDaoSpy.sendPushNotification(message);
    //verify business logic was correct based on Result
}

Answer 1

您还可以在com.google.android.gcm.server软件包中创建MockResult类，该软件包将允许您访问Builder。

package com.google.android.gcm.server;
class MockResult {
    public static Result mockResult(...) {
      // Use Builder here to construct Result
    }
}

对我来说，这感觉比处理反思更容易管理。

Answer 2

我得出的解决方案是使用反射来创建Result对象。我不确定这是否是一种很好的方法，但我能够根据不同的Result错误代码测试业务逻辑。

@Test
public void testSendNotificationToServer () throws Exception {
    String successIndicator = null;
    Result result = buildFauxResult("messageId", "deviceToken", successIndicator);
    PushNotificationMessage message = new PushNotificationMessage("123", "Test", "deviceToken", "Android");
    //Having issue with how to handle Result here
    doReturn(result).when(gcmPushNotificationDaoSpy).sendNotificationToServer(any(Message.class), anyString());
    PushNotificationResult result = gcmPushNotificationDaoSpy.sendPushNotification(message);
    //verify business logic was correct based on Result
}
public Result buildFauxResult (String messageId, String canonicalRegistrationId, String errorCode) throws Exception {
           Class <?> builderClass = Class.forName("com.google.android.gcm.server.Result$Builder");
           Constructor <?> builderConstructor = builderClass.getDeclaredConstructors()[0];
           ReflectionUtils.makeAccessible(builderConstructor);
           Object builderObject = builderConstructor.newInstance();
           Method canonicalRegistrationIdMethod = builderClass.getMethod("canonicalRegistrationId", String.class);
           ReflectionUtils.makeAccessible(canonicalRegistrationIdMethod);
           builderObject = ReflectionUtils.invokeMethod(canonicalRegistrationIdMethod, builderObject, canonicalRegistrationId);
           Method messageIdMethod = builderClass.getMethod("messageId", String.class);
           ReflectionUtils.makeAccessible(messageIdMethod);
           builderObject = ReflectionUtils.invokeMethod(messageIdMethod, builderObject, messageId);
           Method errorCodeMethod = builderClass.getMethod("errorCode", String.class);
           ReflectionUtils.makeAccessible(errorCodeMethod);
           builderObject = ReflectionUtils.invokeMethod(errorCodeMethod, builderObject, errorCode);
           Method buildMethod = builderClass.getMethod("build");
           ReflectionUtils.makeAccessible(buildMethod);
           return (Result) ReflectionUtils.invokeMethod(buildMethod, builderObject);
    }