Elasticsearch JUnit Rule and Extension

This library provides Junit 4 Rule and Junit 5 Extension for starting an elasticsearch server on the local machine.

JUnit 4 Support

With JUnit 4 you can declare and use Elasticsearch rule as follows:

Sample Usage

private static final String ELASTICSEARCH_CLUSTER_NAME = "elasticsearch";

@ClassRule
public static final ElasticsearchRule elasticsearchRule = new ElasticsearchRule(ELASTICSEARCH_CLUSTER_NAME);

private static TransportClient transportClient;

@BeforeClass
public static void setUpClass() {
    transportClient = elasticsearchRule.getTransportClient();
}

@Test
public void testClient() {
    String indexName = "twitter";
    CreateIndexResponse createIndexResponse = transportClient.admin().indices().prepareCreate(indexName).get();
    Assert.assertTrue(createIndexResponse.isAcknowledged());
}

It is also possible to get the network address of the Elasticsearch server and construct the TransportClient:

@BeforeClass
public static void setUpClass() {
    String address = elasticsearchRule.getAddress();
    String elasticsearchHost = address.split(":")[0];
    int elasticsearchPort = Integer.parseInt(address.split(":")[1]);
    InetAddress elasticsearchInetAddress;
    try {
        elasticsearchInetAddress = InetAddress.getByName(elasticsearchHost);
    } catch (UnknownHostException e) {
        throw new AssertionError("Cannot get the elasticsearch server address " + elasticsearchHost + ".", e);
    }
    Settings settings = Settings.builder().put("cluster.name", ELASTICSEARCH_CLUSTER_NAME).build();
    transportClient = new PreBuiltTransportClient(settings);
    transportClient.addTransportAddress(new TransportAddress(elasticsearchInetAddress, elasticsearchPort));
}

JUnit 5 Support

In case of using Junit 5, you can use ElasticsearchExtension like this:

private static final String ELASTICSEARCH_CLUSTER_NAME = "elasticsearch";

@RegisterExtension
static ElasticsearchExtension elasticsearchExtension = new ElasticsearchExtension(ELASTICSEARCH_CLUSTER_NAME);
private static TransportClient transportClient;

@BeforeAll
static void setUpClass(){
        transportClient = elasticsearchExtension.getTransportClient();
}

@Test
public void testClient(){
        String indexName = "twitter";
        CreateIndexResponse createIndexResponse = transportClient.admin().indices().prepareCreate(indexName).get();
        Assert.assertTrue(createIndexResponse.isAcknowledged());
}

Add it to your project

You can refer to this library by either of java build systems (Maven, Gradle, SBT or Leiningen) using snippets from this jitpack link:

JUnit 4 and 5 dependencies are marked as optional, so you need to provide JUnit 4 or 5 dependency (based on what version you need, and you use) in you project to make it work.