Guice, impossible de créer l'injecteur

Question

Je tente de créer un injecteur pour tester une API.

The test binding are as follows 
    class ApiTestModule extends AbstractModule { 
    def configure(): Unit = { 
     bind(classOf[Client]).in(classOf[Singleton]) 
     bind(classOf[ApiGetController]).in(classOf[Singleton]) 
     bind(classOf[ApiPostController]).in(classOf[Singleton]) 
     bind(classOf[IndexService]).in(classOf[Singleton]) 
     bind(classOf[PanelService]).in(classOf[Singleton]) 
     bind(classOf[EntitiesService]).in(classOf[Singleton]) 
     bind(classOf[AuthenticatedPublicApiAction]).in(classOf[Singleton]) 
     bind(classOf[RateLimitedApiAction]).in(classOf[Singleton]) 
     bind(classOf[ApiKeyValidatorUpdaterThread]).in(classOf[Singleton]) 
     bind(classOf[ApiKeyValidatorService]).in(classOf[Singleton]) 
     bind(classOf[ArticleFrontService]).in(classOf[Singleton]) 

    } 

Je te ai créé l'injecteur dans le code

val testModule = new AbstractModule() { 
    def configure() = { 
     new ApiTestModule().configure(binder()) 
    } 
    } 
    val injector = new GuiceApplicationBuilder() 
    .overrides(testModule).injector() 

    val apiGetController = injector.instanceOf(classOf[ApiGetController]) 

Et j'obtiens l'erreur suivante

exception ou erreur a provoqué une course à avorter: Impossible de créer injecteur, voir les erreurs suivantes:

1) No implementation for org.elasticsearch.client.Client annotated with @com.google.inject.name.Named(value=SpikeClient) was bound. 
    while locating org.elasticsearch.client.Client annotated with @com.google.inject.name.Named(value=SpikeClient) 
    for parameter 2 at com.newswhip.api.service.ApiArticleService.<init>(ApiArticleService.scala:19) 
    while locating com.newswhip.api.service.ApiArticleService 
    for parameter 1 at com.newswhip.api.controllers.ApiGetController.<init>(ApiGetController.scala:57) 
    at com.newswhip.spike.inject.TestBindings$ApiTestModule.configure(TestBindings.scala:133) (via modules: com.google.inject.util.Modules$OverrideModule -> com.newswhip.api.service.ApiArticleServiceTest$$anon$1) 

2) No implementation for org.elasticsearch.client.Client annotated with @com.google.inject.name.Named(value=SpikeClient) was bound. 
    while locating org.elasticsearch.client.Client annotated with @com.google.inject.name.Named(value=SpikeClient) 
    for parameter 2 at com.newswhip.api.service.ApiArticleService.<init>(ApiArticleService.scala:19) 
    while locating com.newswhip.api.service.ApiArticleService 
    for parameter 1 at com.newswhip.api.controllers.ApiPostController.<init>(ApiPostController.scala:17) 
    at com.newswhip.spike.inject.TestBindings$ApiTestModule.configure(TestBindings.scala:134) (via modules: com.google.inject.util.Modules$OverrideModule -> com.newswhip.api.service.ApiArticleServiceTest$$anon$1) 

3) No implementation for org.elasticsearch.client.Client annotated with @com.google.inject.name.Named(value=SpikeClient) was bound. 
    while locating org.elasticsearch.client.Client annotated with @com.google.inject.name.Named(value=SpikeClient) 
    for parameter 0 at com.newswhip.spike.article.service.SpikeEsQueryBuilder.<init>(SpikeEsQueryBuilder.scala:20) 
    while locating com.newswhip.spike.article.service.SpikeEsQueryBuilder 
    for parameter 2 at com.newswhip.spike.article.service.EntitiesService.<init>(EntitiesService.scala:30) 
    at com.newswhip.spike.inject.TestBindings$ApiTestModule.configure(TestBindings.scala:137) (via modules: com.google.inject.util.Modules$OverrideModule -> com.newswhip.api.service.ApiArticleServiceTest$$anon$1) 

4) No implementation for org.elasticsearch.client.Client was bound. 
    at com.newswhip.spike.inject.TestBindings$ApiTestModule.configure(TestBindings.scala:131) (via modules: com.google.inject.util.Modules$OverrideModule -> com.newswhip.api.service.ApiArticleServiceTest$$anon$1) 

5) No implementation for play.api.db.Database was bound. 
    at com.newswhip.spike.inject.TestBindings$ApiTestModule.configure(TestBindings.scala:132) (via modules: com.google.inject.util.Modules$OverrideModule -> com.newswhip.api.service.ApiArticleServiceTest$$anon$1 

)

Je pense que le problème est dans mon module de liaisons, mais je n'arrive pas à comprendre quel est le problème. Toute aide serait grandement appréciée.

Answer 1

Mockito est utile pour les tests. Je pense que vous pouvez essayer comme ci-dessous pour tester l'injection avec Guice

class TestModule extends AbstractModule with MockitoSugar { 

    val mockClient: Client = mock[Client] 

    override def configure(): Unit = { 
    bind(classOf[Client]).toInstance(mockClient) 
    } 

} 

Il est facile pour se moquant et stubbing. Si vous voulez ou faux moignon dans le test que vous pouvez utiliser comme cette

doReturn("dummyResult").when(testModule.mockClient).someMethod() 

Answer 2

Jetez un oeil à Guice's BoundFields. Ensuite, vous pouvez créer un test comme celui-ci:

public class TestFoo extends WordSpec with BeforeAndAfterEach with MockitoSugar { 
    // bind(Bar.class).toInstance(barMock); 
    @Bind var barMock: Bar = _ 

    // Foo depends on Bar. 
    @Inject var foo: Foo = _ 

    override def beforeEach() = { 
    barMock = mock[Bar]; 
    Guice.createInjector(BoundFieldModule.of(this)).injectMembers(this); 
    } 

    "your Test" should { 
    "do" in { 
     // your test case 
    } 
    } 
}