Failed to load ApplicationContext in JUnit with JNDI datasource - spring

Question

I have some troubles testing my application, whereas it works well in normal execution.
I think it comes from JNDI resources which are not found, but I don't understand why and how to fix it.
When I start my Junit test, I got this error:
java.lang.IllegalStateException: Failed to load ApplicationContext
at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContext(CacheAwareContextLoaderDelegate.java:99)
at ...
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'DAOImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.sql.DataSource com.sample.DAOImpl.myDatasource; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [javax.sql.DataSource] 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), #org.springframework.beans.factory.annotation.Qualifier(value=myDatasource)}
Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myDatasource' defined in URL [file:src/test/resources/spring/test-dao-config.xml]: Invocation of init method failed; nested exception is javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
at ...
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.sql.DataSource com.sample.DAOImpl.myDatasource; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [javax.sql.DataSource] 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), #org.springframework.beans.factory.annotation.Qualifier(value=myDatasource)}
at ...
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [javax.sql.DataSource] 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), #org.springframework.beans.factory.annotation.Qualifier(value=myDatasource)}
at ..
Here is my configuration:
Context.xml
<Resource name="jdbc/myDatasource" auth="Container" type="javax.sql.DataSource"
driverClassName="oracle.jdbc.OracleDriver"
url="jdbc:oracle:thin:#database:99999:instance"
username="user"
password="password"
validationQuery="select 1 from dual"
testOnBorrow ="true"
maxActive="5"
maxIdle="1"
maxWait="-1" />
test-dao-config.xml
<bean id="myDatasource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:comp/env/jdbc/myDatasource" />
</bean>
DaoImpl
#Repository
public class DacsDAOImpl implements DacsDAO
{
private final static Logger LOGGER = LoggerFactory.getLogger(DAOImpl.class);
#Autowired
#Qualifier("myDatasource")
private DataSource myDatasource;
....
}
And my tests
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(locations = { "file:src/test/resources/spring/test-dao-config.xml" })
public class MyDAOImplTest
{
private MyDAO dao;
#BeforeClass
public static void initJndi() throws IllegalStateException, NamingException
{
//some test, but doesn't work
// SimpleNamingContextBuilder builder = SimpleNamingContextBuilder.emptyActivatedContextBuilder();
// builder.bind("java:comp/env/jdbc/myDatasource", "myDatasource");
// builder.activate();
}
#Before
public void setUp() throws IllegalStateException, NamingException
{
dao = new MyDAOImpl();
}
#Test
public void testTotalUser()
{
int result = dao.getTotalUser();
Assert.assertEquals(0, result);
}
}
Thanks

Answer 1

You are running in a test case so everything in your Context.xml isn't available as that is only available on tomcat. Why do you need a jndi lookup in your test case anyway? If you want to test your dao use an in-memory database like hsql, h2 or derby and use that instead. Spring has some nice tags to make it easy for you.
<jdbc:embedded-database id="myDataSource" type="H2">
// Add some init scripts here.
</jdbc:embedded-database>
If you really need to do a JNDI lookup you are almost there in your test case. However you have to register a DataSource not a String. So you still will need to construct some (in-memory) datasource and bind that to the mock jndi location
#BeforeClass
public static void initJndi() throws IllegalStateException, NamingException
{
//some test, but doesn't work
// Construct in-memory database
SimpleNamingContextBuilder builder = SimpleNamingContextBuilder.emptyActivatedContextBuilder();
builder.bind("java:comp/env/jdbc/myDatasource", myDatasource); //Actual datasource not a String!
builder.activate();
}
And finally your test is also flawed, you are loading your context but aren't doing anything with it. You are constructing a MyDAOImpl in your #Before method. Why even bother loading the context as you are doing nothing with.