c# - 如何对调用服务总线队列客户端 SendAsync 方法的类进行单元测试

Question

我有一个接口(interface)，它有一个方法来创建队列客户端和消息工厂的实例。我已经创建了相同的具体实现，现在我正在尝试对用于将消息发送到队列的功能进行单元测试。我已经为相同的代码编写了以下代码:

private readonly Mock<IQueueClientProvider> queueClientProvider;

private readonly Mock<IJsonSerializer> jsonSerializer;

private readonly Mock<ILogger<QueueConnector>> logger;

private readonly ModelLogger<QueueConnector> modelLogger;

private readonly QueueConnector queueConnector;

private readonly Mock<QueueClient> queueClient;

public QueueConnectorTests() 

{

   queueClientProvider = new Mock< IQueueClientProvider >();

   queueClient = new Mock< QueueClient >();

   logger = new Mock< ILogger< QueueConnector >>();

   jsonSerializer = new Mock< IJsonSerializer >();

   modelLogger = new ModelLogger<QueueConnector>(logger.Object,     jsonSerializer.Object);

queueConnector = new QueueConnector(modelLogger, queueClientProvider.Object);

}

[Fact]
public async void ShouldBeAbleToSendMessage()

{

  BrokeredMessage brokeredMessage = new BrokeredMessage();

brokeredMessage.CorrelationId = "0HKVUFCD6Q5JL";

queueClientProvider.Setup(q =>q.CreateQueueClient()).Returns(queueClient.Object);

// Act

await queueConnector.SendMessage(brokeredMessage);

// Assert

 queueClient.Verify(q => q.SendAsync(brokeredMessage));


}

但出现异常

An exception of type 'System.NotSupportedException' occurred in mscorlib.dll but was not handled in user code

Additional information: Parent does not have a default constructor. The default constructor must be explicitly defined.

不知道这里出了什么问题，有人可以帮我解决这个问题吗？

Answer 1

您应该在代码中使用 IQueueClient 接口(interface)，而不是 QueueClient 实现。 SendAsync 方法是 ISenderClient 接口(interface)的一部分，IQueueClient 继承自该接口(interface)。

一旦你使用了IQueueClient，你可以做这样的事情:

var queueClientMock = new Mock<IQueueClient>();
queueClientMock.Setup(x => 
x.SendAsync(It.IsAny<Message>))).Returns(Task.CompletedTask).Verifiable();