如何在Java中使用Junit4设置测试容器？

如何解决如何在Java中使用Junit4设置测试容器？

我正在尝试在Spring-Boot中使用junit4设置测试容器，以运行集成测试。我在应用程序中使用MongoDB，这就是为什么我在示例中使用MongoDB Container的原因。这是我到目前为止的代码：

import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.testcontainers.containers.MongoDBContainer;

import static org.junit.Assert.assertEquals;

public class AppTest {

    @Rule
    public MongoDBContainer container = new MongoDBContainer("mongo:4.0.10");

    @Before
    public void setUp() {
        container.start();
        String address = container.getHost();
        Integer port = container.getFirstMappedPort();

    }

    @Test
    public void test() {
        assertEquals("example","example");
    }

}

尽管我正在遵循文档，但是在运行测试以测试容器是否已启动并运行时，出现以下错误：

2020-09-14 19:00:42.392  INFO   --- [           main] org.testcontainers.DockerClientFactory   : Connected to docker: 
  Server Version: 19.03.6
  API Version: 1.40
  Operating System: Ubuntu 18.04.4 LTS
  Total Memory: 15731 MB
2020-09-14 19:01:12.856 ERROR   --- [           main] o.testcontainers.utility.ResourceReaper  : Timeout out waiting for Ryuk. Ryuk's log:
2020/09/14 17:00:42 Pinging Docker...
2020/09/14 17:00:42 Docker daemon is available!
2020/09/14 17:00:42 Starting on port 8080...
2020/09/14 17:00:42 Started!


org.testcontainers.containers.ContainerLaunchException: Container startup failed

    at org.testcontainers.containers.GenericContainer.doStart(GenericContainer.java:330)
    at org.testcontainers.containers.GenericContainer.start(GenericContainer.java:311)
    at org.testcontainers.containers.GenericContainer.starting(GenericContainer.java:1022)
    at org.testcontainers.containers.FailureDetectingExternalResource$1.evaluate(FailureDetectingExternalResource.java:29)
    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$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: org.testcontainers.containers.ContainerFetchException: Can't get Docker image: RemoteDockerImage(imageName=mongo:4.0.10,imagePullPolicy=DefaultPullPolicy())
    at org.testcontainers.containers.GenericContainer.getDockerImageName(GenericContainer.java:1279)
    at org.testcontainers.containers.GenericContainer.logger(GenericContainer.java:613)
    at org.testcontainers.containers.GenericContainer.doStart(GenericContainer.java:320)
    ... 18 more
Caused by: java.lang.IllegalStateException: Can not connect to Ryuk at localhost:32773
    at org.testcontainers.utility.ResourceReaper.start(ResourceReaper.java:176)
    at org.testcontainers.DockerClientFactory.client(DockerClientFactory.java:168)
    at org.testcontainers.LazyDockerClient.getDockerClient(LazyDockerClient.java:14)
    at org.testcontainers.LazyDockerClient.listImagesCmd(LazyDockerClient.java:12)
    at org.testcontainers.images.LocalImagesCache.maybeInitCache(LocalImagesCache.java:68)
    at org.testcontainers.images.LocalImagesCache.get(LocalImagesCache.java:32)
    at org.testcontainers.images.AbstractImagePullPolicy.shouldPull(AbstractImagePullPolicy.java:18)
    at org.testcontainers.images.RemoteDockerImage.resolve(RemoteDockerImage.java:59)
    at org.testcontainers.images.RemoteDockerImage.resolve(RemoteDockerImage.java:26)
    at org.testcontainers.utility.LazyFuture.getResolvedValue(LazyFuture.java:20)
    at org.testcontainers.utility.LazyFuture.get(LazyFuture.java:27)
    at org.testcontainers.containers.GenericContainer.getDockerImageName(GenericContainer.java:1277)
    ... 20 more

有人可以帮我弄清楚这里出了什么问题吗？我不确定为什么它无法获取docker镜像