Spring Data neo4j JUnit4 setup

Question

I confess I am a total newbie at the Java way of doing things and I am totally lost trying to get a simple unit test running.

I am building a data access library and want to unit test it. I am using Spring Data Neo4j 4.0.0.BUILD-SNAPSHOT because I need to connect to a remote Neo4j server in the real world.

After battling errors all day I am at the point where I have a test class:

@RunWith(SpringJUnit4ClassRunner.class)
@ComponentScan(basePackages = {"org.mystuff.data"})
@ContextConfiguration(classes={Neo4jTestConfiguration.class})
public class PersonRepositoryTest {
    @Autowired
    PersonRepository personRepository;
    protected GraphDatabaseService graphDb;

    @Before
    public void setUp() throws Exception {
        graphDb = new TestGraphDatabaseFactory().newImpermanentDatabase();
    }

    @After
    public void tearDown() {
        graphDb.shutdown();
    }

    @Test
    public void testCreatePerson() throws Exception {
        assertNotNull(personRepository);
        Person p = new Person("Test", "User");
        personRepository.save(p);
    }
}

Neo4jTestConfiguration.java

@Configuration
@EnableNeo4jRepositories(basePackages = "org.mystuff.data")
@EnableTransactionManagement
public class Neo4jTestConfiguration extends Neo4jConfiguration {
    @Bean
    public SessionFactory getSessionFactory() {
        return new SessionFactory("org.mystuff.data");
    }

    @Bean
    public Neo4jServer neo4jServer() {
        // What to return here? I want in-memory database
        return null;
    }

    @Bean
    @Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
    public Session getSession() throws Exception {
        return super.getSession();
    }
}

When running tests the personRepository.save() throws and exception 'No Scope registered for scope "session"' I don't know if I need the configuration class but my test class won't work without it because Spring needs @ContextConfiguration and I want all the DI niceness Spring provides (amongst other things).

How can I get my tests to work with Spring?

score 3 · Accepted Answer · edited May 23 '17 at 12:22

3

You can use an InProcessServer which is an in-memory database:

@Bean
public Neo4jServer neo4jServer() {
    return new InProcessServer();
}

Omit the session scope as your test isn't running in a web container. An example: https://github.com/neo4j-examples/sdn4-cineasts/blob/4.0-RC1/src/test/java/org/neo4j/cineasts/PersistenceContext.java

This will require dependencies as described in this question: Spring Data Neo4j 4.0.0.M1 Test Configuration

In your test class PersonRepositoryTest, you don't need to construct an instance of the database, your tests will run against the same InProcessServer. Here's an example: https://github.com/neo4j-examples/sdn4-cineasts/blob/4.0-RC1/src/test/java/org/neo4j/cineasts/domain/DomainTest.java

edited May 23 '17 at 12:22

Community

1
1

answered Jun 05 '15 at 04:08

Luanne

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I don't seem to have InProcessServer available. Where does this come from? – Robin Elvin Jun 05 '15 at 09:29
Found it - I needed spring-data-neo4j in my Gradle testCompile definitions – Robin Elvin Jun 05 '15 at 09:35
This works brilliantly now, thank you. The example project is a great source of information and really helps. – Robin Elvin Jun 05 '15 at 09:44
Welcome. There are a couple more sdn4* examples in https://github.com/neo4j-examples – Luanne Jun 05 '15 at 09:48

Spring Data neo4j JUnit4 setup

1 Answers1