JarCastingJunit5-kubernetes 
Inspired by https://www.testcontainers.org/, this project aims at using a kubernetes pod directly form your junit5 test classes. It hence fills the lack of kubernetes support of testcontainers while the library study it's implementation (https://github.com/testcontainers/testcontainers-java/issues/1135).
Maven installation
<dependency>
<groupId>com.github.jeanbaptistewatenberg.junit5kubernetes</groupId>
<artifactId>core</artifactId>
<version>2.3.1-beta</version>
<scope>test</scope>
</dependency>
Gradle installation
testImplementation("com.github.jeanbaptistewatenberg.junit5kubernetes:core:2.3.1-beta")
NEW 2.3.1-beta Usage
Version 2.3.1-beta introduces a new java property junitKubernetesUsePortService, when it is set to true it will create a NodePort service aside of your pods in order to ease pods access from outside your kubernetes cluster.
I am going to test this approach in the upcoming days and stabilize it if I see some benefits from using it.
If you want to test it out you can refer to TestUsingNodePortService.java and feel free to report any issues.
Usage
@JunitKubernetes
public class Test {
private static final String NGINX_PORT = "nginx-80";
private final PortMapper portMapper = new PortMapper();
@KubernetesObject
private KubernetesGenericObject pod = new GenericPodBuilder()
.withNewSpec()
.addNewContainer()
.withName("demonginx")
.withImage("nginx")
.addNewPort()
.withHostPort(portMapper.computeAvailablePort(NGINX_PORT))
.withContainerPort(80)
.endPort()
.endContainer()
.endSpec()
.withWaitStrategy(new WaitRunningStatusStrategy())
.build();
@Test
void should_start_a_pod() throws IOException {
assertThat(pod.getObjectHostIp()).isNotBlank();
assertThat(portMapper.getComputedPort("nginx-80")).isNotNull();
URL url = new URL("http://" + pod.getObjectHostIp() + ":" + portMapper.getComputedPort(NGINX_PORT));
int status = responseStatus(url);
assertThat(status).isEqualTo(200);
}
}
By default Junit5-kubernetes will create a new pod for each of your tests. If you want to reuse your pod accross your tests you can simply switch your @KubernetesObject to be static.
GenericPodBuilder
GenericPodBuilder relies on the official kubernetes java client. You can use it similarly as V1PodBuilder.
PortMapper
In order to use a port you need to expose it to the host machine. PortMapper class is here to pick an available port for you and name it with the name you provided. You can then use this port by calling portMapper.getComputedPort(PORT_NAME).
WaitStrategy
A WaitStrategy define the conditions your pod should meet before being considered as ready to execute your tests against.
Available WaitStrategies are :
PodWaitRunningStatusStrategy: Will wait until the Pod swith to "Running" phase (https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/)PodWaitReadyStrategy: Will wait until the Pod containers swith to "Ready" status (https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/)PodWaitLogStrategy: Will wait for a particular event in the logs (eg. TestWaitForLog.java)
Configuration options
You can configure the extension using JVM system properties. Available properties are :
- kubernetesNamespace : namespace in which you want the extension to deploy the objects
- kubernetesPullSecrets : Comma separated pull secrets (eg :
-DkubernetesPullSecrets=secret1,secret2) - junitKubernetesDebug : print advanced logs about what the extension does, however it will make waiters fails as kubernetes java client
watchis not compatible with this option - junitKubernetesDisableHttp2 : it will set kubernetes client to use only http 1 instead of 2
Common helpers
PostgreSQL helper
Maven
<dependency>
<groupId>com.github.jeanbaptistewatenberg.junit5kubernetes</groupId>
<artifactId>postgresql</artifactId>
<version>2.3.1-beta</version>
</dependency>
Gradle
testImplementation("com.github.jeanbaptistewatenberg.junit5kubernetes:postgresql:2.3.1-beta")
Usage
@JunitKubernetes
public class Test {
@KubernetesObject
private PostgreSQLPod pod = new PostgreSQLPod();
@Test
void should_start_a_pod() throws IOException {
HikariConfig hikariConfig = new HikariConfig();
hikariConfig.setJdbcUrl(pod.getJdbcUrl());
hikariConfig.setUsername(pod.getUsername());
hikariConfig.setPassword(pod.getPassword());
try (HikariDataSource ds = new HikariDataSource(hikariConfig)) {
Statement statement = ds.getConnection().createStatement();
statement.execute("SELECT 1");
ResultSet resultSet = statement.getResultSet();
resultSet.next();
int resultSetInt = resultSet.getInt(1);
assertThat(resultSetInt).isEqualTo(1);
}
}
}
RabbitMQ helper
Maven
<dependency>
<groupId>com.github.jeanbaptistewatenberg.junit5kubernetes</groupId>
<artifactId>rabbitmq</artifactId>
<version>2.3.1-beta</version>
</dependency>
Gradle
testImplementation("com.github.jeanbaptistewatenberg.junit5kubernetes:rabbitmq:2.3.1-beta")
Usage
@JunitKubernetes
public class Test {
@KubernetesObject
private RabbitMQPod pod = new RabbitMQPod();
@Test
void should_start_a_pod() throws IOException {
ConnectionFactory factory = new ConnectionFactory();
factory.setUri(pod.getAmqpUrl());
factory.setUsername(pod.getAdminUsername());
factory.setPassword(pod.getAdminPassword());
Connection conn = factory.newConnection();
assertThat(conn).isNotNull();
}
}
ElasticSearch helper
Maven
<dependency>
<groupId>com.github.jeanbaptistewatenberg.junit5kubernetes</groupId>
<artifactId>elasticsearch</artifactId>
<version>2.3.1-beta</version>
</dependency>
Gradle
testImplementation("com.github.jeanbaptistewatenberg.junit5kubernetes:elasticsearch:2.3.1-beta")
Usage
@JunitKubernetes
public class Test {
@KubernetesObject
private ElasticSearchPod pod = new ElasticSearchPod();
@Test
void should_start_a_pod() throws IOException {
HttpHost httpHost = new HttpHost(pod.getObjectHostIp(), pod.getHttpPort(), "http");
RestHighLevelClient restHighLevelClient = new RestHighLevelClient(RestClient.builder(httpHost));
IndexRequest indexRequest = new IndexRequest("anyindice");
indexRequest.source(Collections.singletonMap("key","value"));
IndexResponse response = restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
assertThat(response.status()).isEqualTo(RestStatus.CREATED);
}
}