jdbc:derby:memory:mydb;create=true

jdbc:derby:memory:mydb;drop=true

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath*:application-context-test.xml"})
@TestExecutionListeners({DirtiesContextTestExecutionListener.class,
    DependencyInjectionTestExecutionListener.class})
@DirtiesContext(classMode = ClassMode.AFTER_EACH_TEST_METHOD)
public abstract class AbstractTest {

}

hibernate.hbm2ddl.auto = create-drop

mydb.drop.url = jdbc:derby:memory:mydb;drop=true

    ...

    <bean id="mydbDropUrl" class="java.lang.String">
    <constructor-arg value="${mydb.drop.url}" />
</bean>

    ...

    @Resource
private String mydbDropUrl;

    @After
public void tearDown() {
    try {
        DriverManager.getConnection(mydbDropUrl);
    } catch (SQLException e) {
        // ignore
    }
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/spring-test.xml")
public class MyTest {
}

public class DatabaseTest implements ApplicationContextAware {
    private ApplicationContext context;
    private DataSource source;

    public void setApplicationContext(ApplicationContext applicationContext) {
        this.context = applicationContext;
    }

    @Before
    public void before() {
        source = (DataSource) dataSource.getBean("dataSource", DataSource.class);
    }

    @After
    public void after() {
        source = null;
    }
}

public class MyDataSourceSpringTest extends
AbstractTransactionalDataSourceSpringContextTests {

    @Override
    protected String[] getConfigLocations() {
        return new String[]{"classpath:test-context.xml"};
    }

    @Override
    protected void onSetUpInTransaction() throws Exception {
        super.deleteFromTables(new String[]{"myTable"});
        super.executeSqlScript("file:db/load_data.sql", true);
    }
}

public class MyDataSourceSpringTest extends
    AbstractTransactionalDataSourceSpringContextTests {

        @Override
        protected String[] getConfigLocations() {
            return new String[]{"classpath:test-context.xml"};
        }

        @Override
        protected void onSetUpInTransaction() throws Exception {
            super.executeSqlScript("file:db/recreate_tables.sql", true);
        }
}

This is what we do at the start of every test.

 1) Drop all Previous Objects.
 2) Create all tables mentioned in the create_table.sql
 3) Insert values onto the created tables based on what you want to test.

  @Before
  public void initialInMemoryDatabase() throws IOException, FileNotFoundException {

  inMemoryDerbyDatabase.dropAllObjects();
  inMemoryDerbyDatabase.executeSqlFile("/create_table_policy_version_manager.sql");
  inMemoryDerbyDatabase.executeSqlFile("/insert_table_policy_version_manager.sql");

  }