GrpcServerRule 未找到实现

Question

我正在尝试为其中一项 GRPC 服务编写一些单元测试。

我正在使用 GrpcServerRule 来执行此操作。

有一次我运行测试，似乎服务的执行没有正确加载。我没找到原因。

这是测试代码。

@RunWith(JUnit4::class)
class CreateListTest {

// Workaround for public
@get:Rule  val serverRule: GrpcServerRule = GrpcServerRule().directExecutor()

@Before
fun setup() {
    serverRule.serviceRegistry.addService(ShopperServerImplementation())
}


@Test
fun testCreateListValidRequest() {
    val request = CreateListRequest.newBuilder()
            .setName("a test list")
            .setAuthorId(25)
            .addAuthorizedUsers(12)
            .build()
    val reply = ShopperServiceGrpc.newBlockingStub(serverRule.channel).createList(request)
    assertEquals(45, reply.createdListId)
}

}

这是服务实现的代码。

class ShopperServerImplementation : ShopperGRPCGrpc.ShopperGRPCImplBase() {
override fun createList(request: CreateListRequest, responseObserver: StreamObserver<CreateListReply>) {
    val reply = CreateListReply.newBuilder().setCreatedListId(80).build()
    responseObserver.onNext(reply)
    responseObserver.onCompleted()
}
}

这是测试结果的日志

io.grpc.StatusRuntimeException: UNIMPLEMENTED: Method not found: shopper.ShopperService/createList

at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:227)
at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:208)
at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:141)
at com.kevinlegoff.shopper.io.ShopperServiceGrpc$ShopperServiceBlockingStub.createList(ShopperServiceGrpc.java:156)
at com.kevinlegoff.shopper.server.CreateListTest.testCreateListValidRequest(CreateListTest.kt:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.rules.ExternalResource.evaluate(ExternalResource.java:48)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access[=12=]0(ParentRunner.java:58)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

提前感谢您的帮助

Answer 1

看来项目的良好清理使一切都运行符合预期。不确定会发生什么。如果我再次遇到它，将调查并 post 关于 github 的问题。

Answer 2

尝试为您的规则字段使用 @JvmField 注释。您还可能运行遇到 gRPC 服务未正确清理的问题。因此，另一种方法是使用单独的 class 和清理规则，例如：

class LoopbackServer {
    val client: ShopperServiceGrpc.ShopperServiceBlockingStub
    private val yourService = ShopperServiceController()

    @Rule
    @JvmField
    val grpcCleanup = GrpcCleanupRule()

    init {
        // Generate a unique in-process server name.
        val serverName = InProcessServerBuilder.generateName()

        // Create a server, add service, start, and register for automatic graceful shutdown.
        grpcCleanup.register(InProcessServerBuilder.forName(serverName).directExecutor()
                .addService(yourService).build().start())

        client = ShopperServiceGrpc.newBlockingStub(
                // Create a client channel and register for automatic graceful shutdown.
                grpcCleanup.register(InProcessChannelBuilder.forName(serverName).directExecutor().build()))
    }
}

然后你可以在你的测试中引用它 class:

class CreateListTest {
    private val server = LoopbackServer()
    private val client = server.client

    @Test
    fun `When service called with a valid List request, it succeeds`() {
        val request = CreateListRequest.newBuilder()
            .setName("a test list")
            .setAuthorId(25)
            .addAuthorizedUsers(12)
            .build()
        val reply = client.createList(request)
        assertEquals(45, reply.createdListId)
    }

}

GrpcServerRule 未找到实现

GrpcServerRule Not finding implementation

kotlin

grpc

grpc-java