Do a Unit test with an H2 database

Question

I am starting to write some Unit test with an H2 database.

Therefore, I want to create a table out of my @Entity.

However, I always get the following error message:

12:40:13.635 [main] WARN org.springframework.context.support.GenericApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in at.wrk.fmd.config.JpaConfigTest: Bean instantiation via factory method failed;

Table "ROLLETEST" not found; SQL statement:

INSERT INTO RolleTest(created_at, bezeichnung) VALUES (now(), 'ADMIN') [42102-197] java.lang.IllegalStateException: Failed to load ApplicationContext

Here are my classes:

JpaConfigTest

@Configuration
@EnableJpaRepositories
@PropertySource("application.propertiesTest")
@EnableTransactionManagement
public class JpaConfigTest {


@Autowired
private Environment env;
 
@Bean
public DataSource dataSource() {
    DataSource dataSource = new DriverManagerDataSource("jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1", "sa", null);
    new ResourceDatabasePopulator(new ClassPathResource("/import-test.sql")).execute(dataSource);

    return dataSource;
}
}

InMemoryDbTest:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(
  classes = { JpaConfigTest.class }, 
  loader = AnnotationConfigContextLoader.class)
@Transactional
@WebMvcTest
public class InMemoryDbTest {
 
@Resource
private StudentRepository studentRepository;
 
@Test
public void givenStudent_whenSave_thenGetOk() {
    Student student = new Student(1, "john");
    studentRepository.save(student);
     
    List<Student> student2 = studentRepository.findAll();
}
}

application.propertiesTest

server.port=8080
server.error.whitelabel.enabled=false

# H2
spring.datasource.driver-class-name=org.h2.Driver
spring.datasource.url=jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1
spring.datasource.username=sa
spring.datasource.password=sa

import-test.sql

INSERT INTO RolleTest(created_at, bezeichnung) VALUES (now(), 'ADMIN');

Maybe someone can tell me what I am missing here.

Answer 1

Sorry, for answering so late, but I have been ill the last couple of days. What I did wrong was that I was not aware of doing an Integration test here. So, some steps had to be done before doing the test itself. I copied the application-test.properties to besides my application.properties file. Then I annotated my main test class as following:

@RunWith(SpringRunner.class)
@SpringBootTest
@AutoConfigureMockMvc
@ActiveProfiles("test")

Then ApplicationContext starts up, creates my tables in my in-memory-database and I can do my tests.