【消息队列开发】实现 VirtualHostTests 类——测试虚拟主机操作

刺骨的言语ヽ痛彻心扉 2024-04-17 10:55 31阅读 0赞

#### 文章目录 ####

*  ?前言
 *  ?准备与收尾工作
 *  ?测试交换机与队列操作
 *  ?测试绑定操作
 *  ?测试将消息发入交换机
 *  ?测试订阅消息
 *  ?测试FANOUT与TOPIC类型的交换机
 *  ?测试手动应答
 *  ⭕总结

## ?前言 ##

本次开发任务

*  实现 VirtualHostTests 类，对虚拟主机进行测试

![在这里插入图片描述][9fedc0d57c5b4fe195655410377e8758.png]

## ?准备与收尾工作 ##

准备工作我们需要做的有

1.  虚拟机操作后续涉及操作数据库，所以我们需要将spring上下文进行获取一下；
2.  创建一个虚拟主机

收尾工作我们需要做的有：

1.  关闭上下文
2.  虚拟主机置为null
3.  删除硬盘上的目录及目录下的文件

代码实现如下：

private VirtualHost virtualHost = null;
    
    @BeforeEach
    public void setUp() {
        
        MqApplication.context = SpringApplication.run(MqApplication.class);
        virtualHost = new VirtualHost("default");
    }
    
    @AfterEach
    public void tearDown() throws IOException {
        
        MqApplication.context.close();
        virtualHost = null;
        // 把硬盘的目录删除掉
        File dataDir = new File("./data");
        FileUtils.deleteDirectory(dataDir);
    }

## ?测试交换机与队列操作 ##

测试交换机我们主要测试四方法：

1.  增加交换机
2.  删除交换机
3.  增加队列
4.  删除队列

由于虚拟机里面的方法，都是调用我们前面已经测试过了的方法，所以我们这里只用看该方法返回值知否未true就好

代码实现如下:

@Test
    public void testExchangeDeclare() {
        
        boolean ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.DIRECT,
                true, false, null);
        Assertions.assertTrue(ok);
    }
    
    @Test
    public void testExchangeDelete() {
        
        boolean ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.DIRECT,
                true, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.exchangeDelete("testExchange");
        Assertions.assertTrue(ok);
    }
    
    @Test
    public void testQueueDeclare() {
        
        boolean ok = virtualHost.queueDeclare("testQueue", true,
                false, false, null);
        Assertions.assertTrue(ok);
    }
    
    @Test
    public void testQueueDelete() {
        
        boolean ok = virtualHost.queueDeclare("testQueue", true,
                false, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.queueDelete("testQueue");
        Assertions.assertTrue(ok);
    }

## ?测试绑定操作 ##

创建相应的队列与交换机，然后将这些队列交换机添加绑定即可

删除也是如此：

代码实现如下：

@Test
    public void testQueueBind() {
        
        boolean ok = virtualHost.queueDeclare("testQueue", true,
                false, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.DIRECT,
                true, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.queueBind("testQueue", "testExchange", "testBindingKey");
        Assertions.assertTrue(ok);
    }
    
    @Test
    public void testQueueUnbind() {
        
        boolean ok = virtualHost.queueDeclare("testQueue", true,
                false, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.DIRECT,
                true, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.queueBind("testQueue", "testExchange", "testBindingKey");
        Assertions.assertTrue(ok);
    
        ok = virtualHost.queueUnbind("testQueue", "testExchange");
        Assertions.assertTrue(ok);
    }

## ?测试将消息发入交换机 ##

传参调用即可，代码实现如下：

@Test
    public void testBasicPublish() {
        
        boolean ok = virtualHost.queueDeclare("testQueue", true,
                false, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.DIRECT,
                true, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.basicPublish("testExchange", "testQueue", null,
                "hello".getBytes());
        Assertions.assertTrue(ok);
    }

## ?测试订阅消息 ##

订阅消息我们分为两种情况：

1.  先订阅队列，再发送消息
2.  先发送消息，再订阅队列

订阅队列操作，我们只需要出入相应的参数，再实现以下消费者自身的回调方法即可。

发送消息直径发送即可

代码实现如下：

// 先订阅队列, 后发送消息
    @Test
    public void testBasicConsume1() throws InterruptedException {
        
        boolean ok = virtualHost.queueDeclare("testQueue", true,
                false, false, null);
        Assertions.assertTrue(ok);
        ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.DIRECT,
                true, false, null);
        Assertions.assertTrue(ok);
    
        // 先订阅队列
        ok = virtualHost.basicConsume("testConsumerTag", "testQueue", true, new Consumer() {
        
            @Override
            public void handleDelivery(String consumerTag, BasicProperties basicProperties, byte[] body) {
        
                try {
        
                    // 消费者自身设定的回调方法.
                    System.out.println("messageId=" + basicProperties.getMessageId());
                    System.out.println("body=" + new String(body, 0, body.length));
    
                    Assertions.assertEquals("testQueue", basicProperties.getRoutingKey());
                    Assertions.assertEquals(1, basicProperties.getDeliverMode());
                    Assertions.assertArrayEquals("hello".getBytes(), body);
                } catch (Error e) {
        
                    // 断言如果失败, 抛出的是 Error, 而不是 Exception!
                    e.printStackTrace();
                    System.out.println("error");
                }
            }
        });
        Assertions.assertTrue(ok);
    
        Thread.sleep(500);
    
        // 再发送消息
        ok = virtualHost.basicPublish("testExchange", "testQueue", null,
                "hello".getBytes());
        Assertions.assertTrue(ok);
    }
    
    // 先发送消息, 后订阅队列.
    @Test
    public void testBasicConsume2() throws InterruptedException {
        
        boolean ok = virtualHost.queueDeclare("testQueue", true,
                false, false, null);
        Assertions.assertTrue(ok);
        ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.DIRECT,
                true, false, null);
        Assertions.assertTrue(ok);
    
        // 先发送消息
        ok = virtualHost.basicPublish("testExchange", "testQueue", null,
                "hello".getBytes());
        Assertions.assertTrue(ok);
    
        // 再订阅队列
        ok = virtualHost.basicConsume("testConsumerTag", "testQueue", true, new Consumer() {
        
            @Override
            public void handleDelivery(String consumerTag, BasicProperties basicProperties, byte[] body) {
        
                // 消费者自身设定的回调方法.
                System.out.println("messageId=" + basicProperties.getMessageId());
                System.out.println("body=" + new String(body, 0, body.length));
    
                Assertions.assertEquals("testQueue", basicProperties.getRoutingKey());
                Assertions.assertEquals(1, basicProperties.getDeliverMode());
                Assertions.assertArrayEquals("hello".getBytes(), body);
            }
        });
        Assertions.assertTrue(ok);
    
        Thread.sleep(500);
    }

## ?测试FANOUT与TOPIC类型的交换机 ##

上面我们只测试了 DIRECT 类型的交换机，接下来我们测试一下FANOUT与TOPIC类型的交换机。

测试步骤与上述类似，准备数据传入，进行测试就好

代码实现如下：

@Test
    public void testBasicConsumeFanout() throws InterruptedException {
        
        boolean ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.FANOUT, false, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.queueDeclare("testQueue1", false, false, false, null);
        Assertions.assertTrue(ok);
        ok = virtualHost.queueBind("testQueue1", "testExchange", "");
        Assertions.assertTrue(ok);
    
        ok = virtualHost.queueDeclare("testQueue2", false, false, false, null);
        Assertions.assertTrue(ok);
        ok = virtualHost.queueBind("testQueue2", "testExchange", "");
        Assertions.assertTrue(ok);
    
        // 往交换机中发布一个消息
        ok = virtualHost.basicPublish("testExchange", "", null, "hello".getBytes());
        Assertions.assertTrue(ok);
    
        Thread.sleep(500);
    
        // 两个消费者订阅上述的两个队列.
        ok = virtualHost.basicConsume("testConsumer1", "testQueue1", true, new Consumer() {
        
            @Override
            public void handleDelivery(String consumerTag, BasicProperties basicProperties, byte[] body) {
        
                System.out.println("consumerTag=" + consumerTag);
                System.out.println("messageId=" + basicProperties.getMessageId());
                Assertions.assertArrayEquals("hello".getBytes(), body);
            }
        });
        Assertions.assertTrue(ok);
    
        ok = virtualHost.basicConsume("testConsumer2", "testQueue2", true, new Consumer() {
        
            @Override
            public void handleDelivery(String consumerTag, BasicProperties basicProperties, byte[] body) {
        
                System.out.println("consumerTag=" + consumerTag);
                System.out.println("messageId=" + basicProperties.getMessageId());
                Assertions.assertArrayEquals("hello".getBytes(), body);
            }
        });
        Assertions.assertTrue(ok);
    
        Thread.sleep(500);
    }
    
    @Test
    public void testBasicConsumeTopic() throws InterruptedException {
        
        boolean ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.TOPIC, false, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.queueDeclare("testQueue", false, false, false, null);
        Assertions.assertTrue(ok);
    
        ok = virtualHost.queueBind("testQueue", "testExchange", "aaa.*.bbb");
        Assertions.assertTrue(ok);
    
        ok = virtualHost.basicPublish("testExchange", "aaa.ccc.bbb", null, "hello".getBytes());
        Assertions.assertTrue(ok);
    
        ok = virtualHost.basicConsume("testConsumer", "testQueue", true, new Consumer() {
        
            @Override
            public void handleDelivery(String consumerTag, BasicProperties basicProperties, byte[] body) {
        
                System.out.println("consumerTag=" + consumerTag);
                System.out.println("messageId=" + basicProperties.getMessageId());
                Assertions.assertArrayEquals("hello".getBytes(), body);
            }
        });
        Assertions.assertTrue(ok);
    
        Thread.sleep(500);
    }

## ?测试手动应答 ##

测试手动应答的时候。

我们需要在订阅队列时，将 autoAck 改成 false；

并且我们需要在消费者的回调方法里进行调用手动应答的方法。

代码实现如下：

@Test
    public void testBasicAck() throws InterruptedException {
        
        boolean ok = virtualHost.queueDeclare("testQueue", true,
                false, false, null);
        Assertions.assertTrue(ok);
        ok = virtualHost.exchangeDeclare("testExchange", ExchangeType.DIRECT,
                true, false, null);
        Assertions.assertTrue(ok);
    
        // 先发送消息
        ok = virtualHost.basicPublish("testExchange", "testQueue", null,
                "hello".getBytes());
        Assertions.assertTrue(ok);
    
        // 再订阅队列 [要改的地方, 把 autoAck 改成 false]
        ok = virtualHost.basicConsume("testConsumerTag", "testQueue", false, new Consumer() {
        
            @Override
            public void handleDelivery(String consumerTag, BasicProperties basicProperties, byte[] body) {
        
                // 消费者自身设定的回调方法.
                System.out.println("messageId=" + basicProperties.getMessageId());
                System.out.println("body=" + new String(body, 0, body.length));
    
                Assertions.assertEquals("testQueue", basicProperties.getRoutingKey());
                Assertions.assertEquals(1, basicProperties.getDeliverMode());
                Assertions.assertArrayEquals("hello".getBytes(), body);
    
                // [要改的地方, 新增手动调用 basicAck]
                boolean ok = virtualHost.basicAck("testQueue", basicProperties.getMessageId());
                Assertions.assertTrue(ok);
            }
        });
        Assertions.assertTrue(ok);
    
        Thread.sleep(500);
    }

## ⭕总结 ##

关于《【消息队列开发】 实现 VirtualHostTests 类——测试虚拟主机操作》就讲解到这儿，感谢大家的支持，欢迎各位留言交流以及批评指正，如果文章对您有帮助或者觉得作者写的还不错可以点一下关注，点赞，收藏支持一下

[9fedc0d57c5b4fe195655410377e8758.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/15/bcbf396fac8d4d7b8002edb92d253f25.png