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Should I use a separate beans.xml configuration to create objects in unit tests?

Here is my Beans.xml for my application

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">


        <bean id="myRoom" class="org.world.hello.Room">
            <property name="bottleCounter">
                <bean id="myBottleCounter" class="org.world.hello.BottleCounter" />
            </property>
            <property name="numBottles" value="10"></property>

        </bean>    
</beans>

This is one Roombean that has a BottleCounterbean property as a property.

Now I want to write unit testing for BottleCounter.

public class BottleCounterTest {

    ApplicationContext context; 

    @Before
    public void setUp()
    {
        context = new ClassPathXmlApplicationContext("Beans.xml");      
    }

    @Test
    public void testOneBottle() {

        BottleCounter bottleCounter = (BottleCounter) context.getBean("myBottleCounter");

        assertEquals("1 bottles of beer on the wall1 bottles of beer!", bottleCounter.countBottle(1));
    }

}

But I can not directly refer to myBottleCounterhow the internal bean? And gives me No bean named 'myBottleCounter' is defined.

So, instead, I define my beans test in a separate xml?

eg.

testBeans.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">


        <bean id="testRoom" class="org.world.hello.Room">
            <property name="bottleCounter">
                <bean id="myBottleCounter" class="org.world.hello.BottleCounter" />
            </property>
            <property name="numBottles" value="3"></property>

        </bean>

        <bean id="testBottleCounter" class="org.world.hello.BottleCounter" />



</beans>

BottleCounterTest.java

public class BottleCounterTest {

    ApplicationContext context; 

    @Before
    public void setUp()
    {
        context = new ClassPathXmlApplicationContext("testBeans.xml");      
    }

    @Test
    public void testOneBottle() {

        BottleCounter bottleCounter = (BottleCounter) context.getBean("testBottleCounter");

        assertEquals("1 bottles of beer on the wall1 bottles of beer!", bottleCounter.countBottle(1));
    }

}
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2 answers

You can do it as follows:

Room room = (Room) context.getBean("myRoom");
BottleCounter bottleCounter = room.getBottleCounter();

, XML, BottleCounter bean .

<bean id="testRoom" class="org.world.hello.Room">
    <property name="bottleCounter">
        <ref bean="myBottleCounter"/>
    </property>
    <property name="numBottles" value="3"></property>

</bean>

<bean id="myBottleCounter" class="org.world.hello.BottleCounter" />
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:

<bean id="myBottleCounter" class="org.world.hello.BottleCounter" />

<bean id="testRoom" class="org.world.hello.Room">
  <property name="bottleCounter">
    <ref bean="myBottleCounter"/>
  </property>
  <property name="numBottles" value="3"></property>
</bean>

@ContextConfiguration(locations = "classpath:Beans.xml")
@RunWith(SpringJUnit4ClassRunner.class)
public class BottleCounterTest {
  @Autowired
  BottleCounter bottleCounter;

  @Test
  public void testOneBottle() {
    assertEquals("1 bottles of beer on the wall1 bottles of beer!", bottleCounter.countBottle(1));
  }
}

, bean BottleCounter, , Spring.

, spring-test.jar .

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