docker container based library to support elastic4s - scala

Question

Im using elastic4s and also interested in using a docker container based testing environment for my elastic search.
There are few libraries like: testcontainers-scala and docker-it-scala, but can't find how I integrate elastic4s into those libraries, did someone ever used a docker container based testing env?
currently my spec is very simple:
class ElasticSearchApiServiceSpec extends FreeSpec {
implicit val defaultPatience = PatienceConfig(timeout = Span(100, Seconds), interval = Span(50, Millis))
val configuration: Configuration = app.injector.instanceOf[Configuration]
val elasticSearchApiService = new ElasticSearchApiService(configuration)
override protected def beforeAll(): Unit = {
elasticSearchApiService.elasticClient.execute {
index into s"peopleIndex/person" doc StringDocumentSource(PeopleFactory.rawStringGoodPerson)
}
// since ES is eventually
Thread.sleep(3000)
}
override protected def afterAll(): Unit = {
elasticSearchApiService.elasticClient.execute {
deleteIndex("peopleIndex")
}
}
"ElasticSearchApiService Tests" - {
"elastic search service should retrieve person info properly - case existing person" in {
val personInfo = elasticSearchApiService.getPersonInfo("2324").futureValue
personInfo.get.name shouldBe "john"
}
}
}
and when I run it, I run elastic search in the background from my terminal, but I want to use containers now so it will be less dependent.

Answer 1

I guess you don't want to depend on ES server running on your local machine for the tests. Then the simplest approach would be using testcontainers-scala's GenericContainer to run official ES docker image this way:
class GenericContainerSpec extends FlatSpec with ForAllTestContainer {
override val container = GenericContainer("docker.elastic.co/elasticsearch/elasticsearch:5.5.1",
exposedPorts = Seq(9200),
waitStrategy = Wait.forHttp("/")
)
"GenericContainer" should "start ES and expose 9200 port" in {
assert(Source.fromInputStream(
new URL(
s"http://${container.containerIpAddress}:${container.mappedPort(9200)}/_status")
.openConnection()
.getInputStream)
.mkString
.contains("ES server is successfully installed"))
}
}