Unit testing 为什么在单元测试期间未调用onMessage（）（JMS侦听器）

从下面的控制台输出中，据我所见，我的嵌入式ActiveMQ已正确初始化，并在616端口应答

当我运行下面的测试时，我假设消息已成功发送，因为我可以逐行调试并看到simpleSend和sendMessage都已运行

我本来希望看到onMessage被触发两次，但实际上并没有发生

在下面的代码中，当我运行单元测试时，我了解到： 1-启动带有代理的嵌入式ActiveMQ 2-MyListener的一个实例被传递到org.springframework.jms.listener.DefaultMessageListenerContainer

那么，为了测试消息，我在这里遗漏了什么

控制台

 INFO | Using Persistence Adapter: MemoryPersistenceAdapter
 INFO | Apache ActiveMQ 5.14.1 (localhost, ID:win10-cha-55866-1509636415848-0:1) is starting
 INFO | Listening for connections at: tcp://127.0.0.1:61616
 INFO | Connector tcp://localhost:61616 started
 INFO | Apache ActiveMQ 5.14.1 (localhost, ID:win10-cha-55866-1509636415848-0:1) started
 INFO | For help or more information please see: http://activemq.apache.org

寄件人

import javax.jms.Queue;

import org.springframework.jms.core.JmsTemplate;

public class SampleJmsMessageSender {

    private JmsTemplate jmsTemplate;
    private Queue queue;

    public void setJmsTemplate(JmsTemplate jmsTemplate) {
        this.jmsTemplate = jmsTemplate;
    }

    public void setQueue(Queue queue) {
        this.queue = queue;
    }

    public void simpleSend() {
        jmsTemplate.send(queue, s -> s.createTextMessage("hello queue world"));
    }

    public void sendMessage(final MyPojo mp) {
        this.jmsTemplate.convertAndSend(mp);
    }
}

EmbeddedActiveMQ.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:task="http://www.springframework.org/schema/task"
    xmlns:amq="http://activemq.apache.org/schema/core"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://activemq.apache.org/schema/core
                        http://activemq.apache.org/schema/core/activemq-core-5.2.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">

    <!-- Embedded ActiveMQ Broker -->
    <amq:broker id="broker" useJmx="false" persistent="false"
        useShutdownHook="false">
        <amq:transportConnectors>
            <amq:transportConnector uri="tcp://localhost:61616" />
        </amq:transportConnectors>
    </amq:broker>
</beans>

听众

import org.springframework.jms.core.JmsTemplate;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Queue;
import javax.jms.TextMessage;
import java.util.Map;

public class MyListener implements MessageListener {

    private JmsTemplate jmsTemplate;
    private Queue queue;

    public void setJmsTemplate(JmsTemplate jmsTemplate) {
        this.jmsTemplate = jmsTemplate;
    }

    public void setQueue(Queue queue) {
        this.queue = queue;
    }
    @Override
    public void onMessage(Message message) {
        if (message instanceof TextMessage) {
            try {
                String msg = ((TextMessage) message).getText();
                System.out.println("Received message: " + msg);
            } catch (JMSException ex) {
                throw new RuntimeException(ex);
            }
        }
    }

    public MyPojo receiveMessage() throws JMSException {
        Map map = (Map) this.jmsTemplate.receiveAndConvert();
        return new MyPojo((String) map.get("name"), (Integer) map.get("age"));
    }
}

pom.xml

   <properties>
        <springframework.version>4.3.4.RELEASE</springframework.version>
        <activemq.version>5.14.1</activemq.version>
        <maven-war-plugin.version>2.6</maven-war-plugin.version>
        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
        <junit.version>4.12</junit.version>
    </properties>

    <dependencies>

        <!-- Spring JMS -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jms</artifactId>
            <version>${springframework.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-logging</artifactId>
                    <groupId>commons-logging</groupId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- ActiveMQ -->
        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-all</artifactId>
            <version>${activemq.version}</version>
        </dependency>

        <!--  test -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <pluginManagement> 
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>${maven-war-plugin.version}</version>
                    <configuration>
                        <warSourceDirectory>src/main/webapp</warSourceDirectory>
                        <warName>spring-jms</warName>
                        <failOnMissingWebXml>false</failOnMissingWebXml>
                    </configuration>
                </plugin>

                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>${maven-compiler-plugin.version}</version>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement> 
        <finalName>spring-jms</finalName>
    </build>

---

您的单元测试在侦听器异步使用消息之前停止，您必须通过以下方式将其包括到测试中： 添加一个Thread.sleep2000；延迟测试停止

或者添加MyListener.receiveMessage并删除DMLC

或者将字符串msg=null；将MyListener作为实例变量，并在测试中等待此值不为null

对于实际代码，在调试模式下，您可以在MyListener.onMessage上设置断点，以验证消息是否已被使用

import org.springframework.jms.core.JmsTemplate;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Queue;
import javax.jms.TextMessage;
import java.util.Map;

public class MyListener implements MessageListener {

    private JmsTemplate jmsTemplate;
    private Queue queue;

    public void setJmsTemplate(JmsTemplate jmsTemplate) {
        this.jmsTemplate = jmsTemplate;
    }

    public void setQueue(Queue queue) {
        this.queue = queue;
    }
    @Override
    public void onMessage(Message message) {
        if (message instanceof TextMessage) {
            try {
                String msg = ((TextMessage) message).getText();
                System.out.println("Received message: " + msg);
            } catch (JMSException ex) {
                throw new RuntimeException(ex);
            }
        }
    }

    public MyPojo receiveMessage() throws JMSException {
        Map map = (Map) this.jmsTemplate.receiveAndConvert();
        return new MyPojo((String) map.get("name"), (Integer) map.get("age"));
    }
}

   <properties>
        <springframework.version>4.3.4.RELEASE</springframework.version>
        <activemq.version>5.14.1</activemq.version>
        <maven-war-plugin.version>2.6</maven-war-plugin.version>
        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
        <junit.version>4.12</junit.version>
    </properties>

    <dependencies>

        <!-- Spring JMS -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jms</artifactId>
            <version>${springframework.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-logging</artifactId>
                    <groupId>commons-logging</groupId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- ActiveMQ -->
        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-all</artifactId>
            <version>${activemq.version}</version>
        </dependency>

        <!--  test -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <pluginManagement> 
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>${maven-war-plugin.version}</version>
                    <configuration>
                        <warSourceDirectory>src/main/webapp</warSourceDirectory>
                        <warName>spring-jms</warName>
                        <failOnMissingWebXml>false</failOnMissingWebXml>
                    </configuration>
                </plugin>

                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>${maven-compiler-plugin.version}</version>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement> 
        <finalName>spring-jms</finalName>
    </build>