CODEWITHSUNDEEP
scalafunctional-testingscalatest
Saquib Gul
Saquib Gul

Reputation: 69

How to run BeforeAll and AfterAll for multiple suites in Scalatest

My scenario for test is that I have following hierarchy:

AfterAll
  AfterAll
    Test Suite for Component 1 with multiple test cases
  BeforeAll
  AfterAll
    Test Suite for Component 2 with multiple test cases
  BeforeAll
  AfterAll
    Test Suite for Component 2 with multiple test cases
  BeforeAll
BeforeAll

Now I have the idea that I can run my setup part before and after a Suite and each Test Case, but is there a way that i can run my setup before and after all Test Suites

Upvotes: 1

Views: 2793

Answers (1)

flavian
flavian

Reputation: 28511

You can leverage inheritance to replicate the setup across a variety of suites, it's slightly manual but it's a very common approach.

trait DefaultSuite extends Suite with BeforeAndAfterAll with Informing {
  override def beforeAll(): Unit = {..}
  override def afterAll(): Unit = {..}
}


class Component1Tests extends FlatSpec with DefaultSuite {}
class Component2Tests extends FlatSpec with DefaultSuite {}
class Component3Tests extends FlatSpec with DefaultSuite {}

If you want something that only runs once, before and after everying, you need to get a little smarter. In some cases an SBT plugin or task to deal with the most advanced scenarios, in others you do something like this:

object Singleton {
  val dbConnection = DB(..)
}

trait DefaultSuite extends Suite with BeforeAndAfterAll with Informing {
  def dbConnection: DB = Singleton.dbConnection
}

So implementors of your DefaultSuite will be able to access a bunch of things easily, but behind the scenes there is only a single instance of a particular object. I've used this technique quite successfully in the past, where a singleton and a trait are used to provide "fake" inheritance, but actually you are referencing the same instance of various objects.

Upvotes: 3

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