我使用Cucumber
与Guice
作为DI。
我遇到过以下问题:
我有一步,即
class MyStep() {
@Inject
private MyService myService;
@Given("Some acction happen")
public void sthHappen() {
myService.doSth();
}
}
我已将此课程作为JUnit
测试
@RunWith(Cucumber.class)
@CucumberOptions(...)
public class MyTest {
}
有一个
class MyModule extends AbstractModule {
@Override
protected void configure() {
bind(MyService.class).to(MyFirstService.class);
}
}
我的MyInjectorSource
使用的
我定义了我定义guice.injector-source=MyInjectorSource;
的cucumber.properties
还有一个带有场景的功能文件。
现在一切都在运作。
并且我不想在其他MyService实现中运行MyStep步骤(当然我不会重复MyStep的代码) 我用新场景和新的测试类
定义了一个新的特征文件@RunWith(Cucumber.class)
@CucumberOptions(...)
public class MyOtherTest {
}
现在我尝试创建另一个InjectorSource
,但我无法配置它。
答案 0 :(得分:2)
我发现的解决方案是使用继承自原始Cucumber跑步者并更改其createRuntime
方法的自定义Junit4跑步者。
最新的黄瓜guise 1.2.5使用几个阶段来创建注入器,不幸的是它使用全局变量cucumber.runtime.Env.INSTANCE
。此变量由cucumber.properties
和System.getProperties
填充。
流程是:
cucumber.runtime.java.JavaBackend
)ObjectFactory
(在我的设置中为cucumber.runtime.java.guice.impl.GuiceFactory)Env.INSTANCE
,它将创建自定义InjectorSource
或默认注入器理想情况下,黄瓜应该将其在开始时创建的' RuntimeOptions`传递给InjectorSource,但不幸的是它并没有使用全局变量。创建像这样的补丁并不容易,所以我的解决方案简化了这种方法,并通过读取新的注释直接在自定义运行器中创建InjectorSource。
public class GuiceCucumberRunner extends Cucumber {
public GuiceCucumberRunner(Class<?> clazz) throws InitializationError, IOException {
super(clazz);
}
@Override
protected Runtime createRuntime(ResourceLoader resourceLoader, ClassLoader classLoader, RuntimeOptions runtimeOptions) throws InitializationError, IOException {
Runtime result = new Runtime(resourceLoader, classLoader, Arrays.asList(createGuiceBackend()), runtimeOptions);
return result;
}
private JavaBackend createGuiceBackend() {
GuiceCucumberOptions guiceCucumberOptions = getGuiceCucumberOptions();
InjectorSource injectorSource = createInjectorSource(guiceCucumberOptions.injectorSource());
ObjectFactory objectFactory = new GuiceFactory(injectorSource.getInjector());
JavaBackend result = new JavaBackend(objectFactory);
return result;
}
private GuiceCucumberOptions getGuiceCucumberOptions() {
GuiceCucumberOptions guiceCucumberOptions = getTestClass().getJavaClass().getAnnotation(GuiceCucumberOptions.class);
if (guiceCucumberOptions == null) {
String message = format("Suite class ''{0}'' is missing annotation GuiceCucumberOptions", getTestClass().getJavaClass());
throw new CucumberException(message);
}
return guiceCucumberOptions;
}
private InjectorSource createInjectorSource(Class<? extends InjectorSource> clazz) {
try {
return clazz.newInstance();
} catch (Exception e) {
String message = format("Instantiation of ''{0}'' failed. InjectorSource must have has a public zero args constructor.", clazz);
throw new InjectorSourceInstantiationFailed(message, e);
}
}
static class GuiceFactory implements ObjectFactory {
private final Injector injector;
GuiceFactory(Injector injector) {
this.injector = injector;
}
@Override
public boolean addClass(Class<?> clazz) {
return true;
}
@Override
public void start() {
injector.getInstance(ScenarioScope.class).enterScope();
}
@Override
public void stop() {
injector.getInstance(ScenarioScope.class).exitScope();
}
@Override
public <T> T getInstance(Class<T> clazz) {
return injector.getInstance(clazz);
}
}
}
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.TYPE })
public @interface GuiceCucumberOptions {
Class<? extends InjectorSource> injectorSource();
}
@RunWith(GuiceCucumberRunner.class)
@GuiceCucumberOptions(injectorSource = MyInjector.class)
@CucumberOptions(
...
)
public class Suite {
}
我需要复制GuiceFactory,因为它没有公开普通的构造函数(!)