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javaspringjunit

No bean named is defined

I am using JUnit to test Component of Spring,throws error:

org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'wsVehicleService' is defined

This is my test class:

package com.zw.ws.service.impl;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.ComponentScan;;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:/*.xml")    
public class WsVehicleServiceTest {

    @Autowired
    ApplicationContext ctx;

    @Test
    public void getHistoryAlarmInfo() throws Exception {
        try {
            String requestJson = "\"{\"VEHICLEID\":\"cae21196-cb66-4256-88a6-7cdfb23e2c78\",\"STARTTIME\":1476115200,\"ENDTIME\":1476201599,\"TYPE\":1}\"";
            WsVehicleService vehicleService = (WsVehicleService) ctx.getBean("wsVehicleService");
            vehicleService.getHistoryAlarmInfoImpl(requestJson);
        } catch (BeansException e) {
            e.printStackTrace();
        }
    }
}

This is the class will be tested:

@Component
public class WsVehicleService {

    public List<HistoryAlarmInfo> getHistoryAlarmInfo(String requestJson) {
        try {
            return getHistoryAlarmInfoImpl(requestJson);
        } catch (Exception e) {
            log.error(e);
            return null;
        }
    }
}

When JUnit run to getBean,throws error:No bean named 'wsVehicleService' is defined. Where is going wrong?What could I do to make it right?

What I having tried:

add @ComponentScan("com.zw.ws.*") to scan the WsVehicleService class.

This is the log:

    12:53:11.098]-[main]-[org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener]-{After test method: context [DefaultTestContext@58783f6c testClass = WsVehicleServiceTest, testInstance = com.zw.ws.service.impl.WsVehicleServiceTest@7577b641, testMethod = getHistoryAlarmInfo@WsVehicleServiceTest, testException = org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'wsVehicleService' is defined, mergedContextConfiguration = [MergedContextConfiguration@3a7b503d testClass = WsVehicleServiceTest, locations = '{classpath:/*.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]], class annotated with @DirtiesContext [false] with mode [null], method annotated with @DirtiesContext [false] with mode [null].}

org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'wsVehicleService' is defined

    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:698)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1175)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054)
    at com.zw.ws.service.impl.WsVehicleServiceTest.getHistoryAlarmInfo(WsVehicleServiceTest.java:27)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:253)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)


            12:53:11.107]-[main]-[org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener]-{After test class: context [DefaultTestContext@58783f6c testClass = WsVehicleServiceTest, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@3a7b503d testClass = WsVehicleServiceTest, locations = '{classpath:/*.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]], class annotated with @DirtiesContext [false] with mode [null].}

PS:This is no XML configuration,all beans are using autoscan.

Solution

  • 1)First Solution:

    @ContextConfiguration initializes the Spring context and by default looks for a Spring XML file in the same package as the unit test with the file name the same as the class with '-context.xml' as a suffix

    Try adding the WsVehicleServiceTest-context.xml file in com.mycompany.annotation package.

    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
                           http://www.springframework.org/schema/beans/spring-beans.xsd">

      <bean id="wsVehicleService"
          class="com.mycompany.annotation.WsVehicleService">
      </bean>

</beans>

    Junit test class after removing ("classpath:/*.xml"):

    package com.mycompany.annotation;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
public class WsVehicleServiceTest {

    @Autowired
    ApplicationContext ctx;

    @Test
    public void getHistoryAlarmInfo() throws Exception {
        try {
            WsVehicleService vehicleService = (WsVehicleService) ctx
                    .getBean("wsVehicleService");
            String hi = vehicleService.sayHi();
            System.out.println(hi);
        } catch (BeansException e) {
            e.printStackTrace();
        }
    }
}

    Note: If you want to use @ContextConfiguration("classpath:/*.xml") make sure you put 

    <bean id="wsVehicleService"
              class="com.mycompany.annotation.WsVehicleService">
</bean>

    in any one of your *.xml file

    2) Second Solution:

    Make sure you put <context:annotation-config /> in your xml file. Here you do not need to declare the wsVehicleService bean in your xml file.

    Modify your test class by using @Autowired on WsVehicleService 

    @RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:/*.xml")   
public class WsVehicleServiceTest {

    @Autowired
    ApplicationContext ctx;

    @Autowired
    WsVehicleService wsVehicleService;

    @Test
    public void getHistoryAlarmInfo() throws Exception {
        try {
            String hi = wsVehicleService.sayHi();
            System.out.println(hi);
        } catch (BeansException e) {
            e.printStackTrace();
        }
    }
}

    3) Third solution:

    You have mentioned, you do not use any xml configuration files and your exception tells org.springframework.beans.factory.NoSuchBeanDefinitionException

    One reason your WsVehicleService may not exist in the context – is that it may be defined in a package that is not scanned by Spring.

    Make sure your WsVehicleService exist in @ComponentScan("com.mycompany.annotation") package.

    1) Application configuration class with annotation @Configuration

    package com.mycompany.annotation;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;


@Configuration
@ComponentScan("com.mycompany.annotation")
public class AppConfig {

}

    2) Your service class

    package com.mycompany.annotation;

import org.springframework.stereotype.Component;

@Component
public class WsVehicleService {
    public String sayHi(){
        return "HI !!!!!!!!!!";
    }
}

    3)Junit test class

    package com.mycompany.annotation;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = AppConfig.class)
public class WsVehicleServiceTest {

    @Autowired
    ApplicationContext ctx;

    @Test
    public void getHistoryAlarmInfo() throws Exception {
        try {
            WsVehicleService vehicleService = (WsVehicleService) ctx
                    .getBean("wsVehicleService");
            String hi = vehicleService.sayHi();
            System.out.println(hi);
        } catch (BeansException e) {
            e.printStackTrace();
        }
    }
}

    OUTPUT:

    HI !!!!!!!!!!

    For more info you can refer this and this

    More reference for causes and possible solution for NoSuchBeanDefinitionException