将Spring与Serenity / JBehave测试集成

Question

我试图让Spring依赖注入在Serenity / JBehave测试中工作，但是SpringClassRule和SpringMethodRule都没有得到应用（我怀疑，这是为什么@ContextConfiguration和@Autowired都被忽略了，并且当调用tyring时我得到一个NullPointerException服务）。

我也尝试过来自serenity-spring库的SpringIntegrationClassRule和SpringIntegrationMethodRule，但无济于事。

有谁知道如何让它工作？

我的考试班：

@ContextConfiguration(locations = "test-beans.xml", 
                      loader = TestContextLoader.class)
public class GreetingServiceTest extends SerenityStories {

    @ClassRule
    public static final SpringClassRule SPRING_CLASS_RULE = new SpringClassRule();
    @Rule
    public final SpringMethodRule springMethodRule = new SpringMethodRule();

    @Autowired
    private GreetingService greetingService;

    private String greeting;

    @When("I want a greeting")
    public void whenIWantAGreeting() {
        greeting = greetingService.getGreeting();
    }

    @Then("I shall be greeted with \"$greeting\"")
    public void thenIShallBeGreetedWith(String greeting) {
        assertEquals(greeting, this.greeting);
    }

    @Override
    public InjectableStepsFactory stepsFactory() {
        return new InstanceStepsFactory(configuration(), this);
    }
}

我的故事：

Scenario: Hello world
When I want a greeting
Then I shall be greeted with "Hello world"

test context loader.Java:

public class TestContextLoader implements ContextLoader {

    @Override
    public String[] processLocations(Class<?> clazz, String... locations) {
        return locations;
    }

    @Override
    public ApplicationContext loadContext(String... locations) throws Exception {
        System.err.println("This is never printed.");
        return new ClassPathXmlApplicationContext(locations);
    }

}

测试-beans.xml文件：

<?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:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd">

    <context:component-scan base-package="com.example"/>

</beans>

greeting service.Java:

@Service
public class GreetingService {

    public String getGreeting() {
        return "Hello world";
    }
}

我使用以下库：

org.springframework:spring-core:5.1.4.RELEASE  
org.springframework:spring-context:5.1.4.RELEASE  
org.springframework:spring-test:5.1.4.RELEASE  
net.serenity-bdd:serenity-core:2.0.40  
net.serenity-bdd:serenity-jbehave:1.44.0  
junit:junit:4.12

注意：这是我现实生活中的一个非常简化的版本，我需要Spring XML配置和自定义上下文加载器。

Answer 1

我使用以下hack（基本上自己注入服务）解决了这个问题：

@ContextConfiguration(locations = "test-beans.xml", 
                      loader = TestContextLoader.class)
public class GreetingServiceTest extends SerenityStories {

    @Autowired
    private GreetingService greetingService;

    private String greeting;

    @When("I want a greeting")
    public void whenIWantAGreeting() {
        greeting = greetingService.getGreeting();
    }

    @Then("I shall be greeted with \"$greeting\"")
    public void thenIShallBeGreetedWith(String greeting) {
        assertEquals(greeting, this.greeting);
    }

    @Override
    public InjectableStepsFactory stepsFactory() {
        return new InstanceStepsFactory(configuration(), this);
    }

    @BeforeStories
    public final void beforeStories() {
        AutowireCapableBeanFactory beanFactory = getContext().getAutowireCapableBeanFactory();
        beanFactory.autowireBeanProperties(this, AutowireCapableBeanFactory.AUTOWIRE_NO, false);
        beanFactory.initializeBean(this, getClass().getName());
    }

    private ApplicationContext getContext() {
        return SpringClassRuleHack.getTestContextManager(getClass())
            .getTestContext()
            .getApplicationContext();
    }
}

SpringClassRuleHack（必须与SpringClassRule相同才能访问getTestContextManager方法）：

package org.springframework.test.context.junit4.rules;

import org.springframework.test.context.TestContextManager;

public final class SpringClassRuleHack {

   private SpringClassRuleHack() {}

   public static TestContextManager getTestContextManager(Class<?> testClass) {
      return SpringClassRule.getTestContextManager(testClass);
   }

}

我通过SpringClassRule获取Spring上下文，以便它被Spring缓存，让Spring控制上下文需要重新加载（如果我已经正确理解）。

我对这个解决方案并不完全满意，我怀疑它并不等同于以标准方式启用SpringClassRule / SpringMethodRule，但它适用于我的情况。