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POUnit testing a Spring Boot service class with(out) repository in JUnit
 

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  1. POUnit testing a Spring Boot service class with(out) repository in JUnit
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    <p>I am working on a spring boot based webservice with following structure:</p> <p>Controller (REST) --> Services --> Repositories (as suggested in some tutorials).</p> <p>My Database Connection (JPA/Hibernate/MySQL) is defined in a @Configuration class. (see below)</p> <p>Now I'd like to write simple tests for methods in my Service classes, but I don't really understand how to load ApplicationContext into my test classes and how to mock the JPA / Repositories. </p> <p>This is how far I came:</p> <p>My service class</p> <pre><code>@Component public class SessionService { @Autowired private SessionRepository sessionRepository; public void MethodIWantToTest(int i){ }; [...] } </code></pre> <p>My test class:</p> <pre><code>@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(loader = AnnotationConfigContextLoader.class) public class SessionServiceTest { @Configuration static class ContextConfiguration { @Bean public SessionService sessionService() { return new SessionService(); } } @Autowired SessionService sessionService; @Test public void testMethod(){ [...] } } </code></pre> <p>But I get following exception:</p> <blockquote> <p>Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.myApp.SessionRepository com.myApp.SessionService.sessionRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.myApp.SessionRepository] 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)}</p> </blockquote> <p>For completeness: here's my @Configuration for jpa:</p> <pre><code>@Configuration @EnableJpaRepositories(basePackages={"com.myApp.repositories"}) @EnableTransactionManagement public class JpaConfig { @Bean public ComboPooledDataSource dataSource() throws PropertyVetoException, IOException { ... } @Bean public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource, JpaVendorAdapter jpaVendorAdapter) { ... } @Bean public JpaVendorAdapter jpaVendorAdapter() { ... } @Bean public PlatformTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) { ... } @Bean public PersistenceExceptionTranslationPostProcessor exceptionTranslation(){ ... } } </code></pre>
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