#Autowired always getting null - spring

Question

I have a Java interface:
public interface TestRequestDAO {
...
}
And the Implementation of the interface:
#Component
#ContextConfiguration(locations = "file:src/main/resources/my-context.xml")
public class TestRequestDAOImpl implements TestRequestDAO {
...
}
Now I am autowiring the Bean from another class like below and getting null always:
#Autowired
private TestRequestDAO requestDao;
Here is my spring context xml named as my-context.xml which is placed inside the src/main/resources/ directory.
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context/spring-context-4.0.xsd" >
<context:annotation-config/>
<context:component-scan base-package="org.test.code"/>
</beans>
This example is made based one the other stackoverflow questions. I have added the annotation #ContextConfiguration since nothing worked with me.
I am using Maven and I have started from spring version 2.5.5 and ended with 4.0.1.RELEASE. But nothing seemed to work with me. I have changed this version through maven:
...
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<!--version>2.5.5</version-->
<version>4.0.1.RELEASE</version>
</dependency>
...

Answer 1

A test would normally look something like this :
#RunWith (SpringJUnit4ClassRunner.class)
#ContextConfiguration (locations = "classpath:applicationContext-test.xml")
#WebAppConfiguration
#Transactional
public MyTest {...}
And then have Components injected into into it, as required. Don't make the test a component.
If the bean is not a test, don't call it TestXyz.