Question

我正在尝试使用Weld SE 2.3.0.Final在测试期间交换注入依赖项的替代实现，方法是在beans.xml中提供不同的src/test/resources/META-INF

虽然似乎总是使用beans.xml的主要版本，但我不确定原因。

首先，这里是支持类

Engine.java

public interface Engine
{
    void start();
    void stop();
}

DefaultEngine.java

@Vetoed
public class DefaultEngine implements Engine
{

    public void start()
    {
        System.out.println("Cough cough vrummmmm");
    }

    public void stop()
    {
        System.out.println("Phhhut clank");
    }

}

Car.java

public class Car
{
    @Inject
    private Engine engine;

    public void startCar()
    {
        engine.start();
    }

    public void stopCar()
    {
        engine.stop();
    }

}

EngineProducer.java

public class EngineProducer
{

    @Produces
    public Engine getEngine()
    {
        return new DefaultEngine();
    }

}

App.java

public class App 
{
    @Inject
    private Car car;

    public void main(@Observes ContainerInitialized event)
    {
        car.startCar();
        car.stopCar();
    }
}

beans.xml

中src/main/resources/META-INF的生产版本

<beans xmlns="http://java.sun.com/xml/ns/javaee" 
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
      http://www.oracle.com/webfolder/technetwork/jsc/xml/ns/javaee/beans_1_0.xsd">
</beans>

从App.java运行时的上述代码应该打印（并且确实如此）

Cough cough vrummmmm
Phhhut clank

现在从测试代码中我想使用SportsEngine实现。所以我有以下

SportsEngine.java

@Vetoed
public class SportsEngine implements Engine
{

    public void start()
    {
        System.out.println("Vrummm vrummm vrummmm!");
    }

    public void stop()
    {
        System.out.println("Prrrrrr clunk");
    }

}

TestEngineProducer.java

@Alternative
public class TestEngineProducer
{

    @Produces
    public Engine getEngine()
    {
        return new SportsEngine();
    }

}

AppTest.java

@RunWith(WeldJUnit4Runner.class)
public class AppTest
{

    @Inject
    private Car car;

    @Test
    public void testCar()
    {
        car.startCar();
        car.stopCar();
    }

}

WeldJUnit4Runner.java

public class WeldJUnit4Runner extends BlockJUnit4ClassRunner
{

    /** The test class to run. */
    private final Class<?> mKlass;
    /** Weld infrastructure. */
    private final Weld weld;
    /** The container itself. */
    private final WeldContainer container;

    /**
     * Runs the class passed as a parameter within the container.
     * 
     * @param klass
     *            to run
     * @throws InitializationError
     *             if anything goes wrong.
     */
    public WeldJUnit4Runner(final Class<Object> klass) throws InitializationError
    {
        super(klass);
        this.mKlass = klass;
        this.weld = new Weld();
        this.container = weld.initialize();
    }

    @Override
    protected Object createTest() throws Exception
    {
        final Object test = container.instance().select(mKlass).get();
        return test;
    }
}

beans.xml

中的src/test/resources/META-INF测试版

<beans xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
      http://www.oracle.com/webfolder/technetwork/jsc/xml/ns/javaee/beans_1_0.xsd">
    <alternatives>
        <class>com.test.testing.TestEngineProducer</class>
    </alternatives>
</beans>

运行测试方法时，应打印

Vrummm vrummm vrummmm!
Prrrrrr clunk

但相反它似乎使用EngineProducer而不是TestEngineProducer并打印输出两次

Cough cough vrummmmm
Phhhut clank
Cough cough vrummmmm
Phhhut clank

为什么不使用test beans.xml？

如果我从test beans.xml中放入<alternatives>部分并将其放在main beans.xml中，那么它可以工作，但我不想在main / resources /中交换beans.xml我测试时的META-INF

Answer 1

这似乎是Weld Se的一个错误。它只使用src / main / resources / META-INF下的beans.xml版本。

解决方案是使用CDI-SE src / main / resources / META-INF / beans.xml下的beans.xml进行测试，您可能需要添加＆lt;排除＆GT;进入beans.xml。

您可以拥有另一个生产beans.xml文件，并将代码导出到部署包（jar，war，ear）。不要忘记用production beans.xml替换测试beans.xml。

如果您正在开发网络应用程序。您可以在WEB-INF下创建生产beans.xml。存在beans.xml的2个版本，但WAS仅使用WEB-INF / beans.xml。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
    version="1.1" bean-discovery-mode="all">
    <scan>
        <exclude name="org.jboss.weld.**" />
        <exclude name="com.your_package.EngineProducer" />
    </scan>
    <alternatives>
        <class>com.test.testing.TestEngineProducer</class>
    </alternatives>
</beans>

焊接使用src / test / META-INF / beans.xml中的替代生产者

1 个答案: