Spring 3 and JUnit 4 (autowiring)

autowiredjunit4spring

I am new to Spring MVC and JUnit. Basically I want to autowire the service class and this class should be loaded in spring context.

Service


    @Service 
    public class FundService  {
        @Autowired
        FundDAO fundDAO;

        /**
         * @return
         */
        public List getFundDetails(String productId) {

            return fundDAO.getFundDetails(productId);
        }   
    }

application-context

<beans>

    <mvc:annotation-driven />

    <context:component-scan base-package="com.test.*" />
</beans>

Junit class


    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration(locations={"classpath*:/WEB-INF/application-context.xml"})
    public class CompensationServiceTest {

        @Autowired
        private FundService fundService;

        @Test
        public void verifyGetCompensationList()
        {
            System.out.println(fundService == null);
        }
    }

While executing the test I am getting following exception trace


    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.test.admin.service.CompensationServiceTest': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.test.admin.service.FundService com.test.admin.service.CompensationServiceTest.fundService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.test.admin.service.FundService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:286)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1064)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:374)
        at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:110)
        at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75)
        at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:333)
        at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:220)
        at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:301)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
        at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:303)
        at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:240)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
        at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
        at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
        at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
        at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
        at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
    Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.test.admin.service.FundService com.test.admin.service.CompensationServiceTest.fundService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.test.admin.service.FundService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:507)
        at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84)
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:283)
        ... 26 more
    Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.test.admin.service.FundService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:903)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:772)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:686)
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478)
        ... 28 more

Best Solution

First of all, the WEB-INF folder should never be in the classpath; it should be in the file system of the project. So if you use the Maven project structure, that folder would be located relative to the root of your project (i.e., src/main/webapp/WEB-INF). In that case you would want to declare an XML configuration file in that folder as a file system resource like this:

@ContextConfiguration("file:src/main/webapp/WEB-INF/application-context.xml")

Secondly, if this is a test configuration file, you should not store it under WEB-INF. Instead, you should store it in the classpath. Following the Maven project structure, this would be src/test/resources/application-context.xml, in which case you would use the following declaration in your test:

@ContextConfiguration("/application-context.xml")

or

@ContextConfiguration("classpath:application-context.xml")

... whichever your prefer, but note that they are equivalent.

Regards and thanks,

Sam

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