How do I share a single object with multiple Scalatest suites?

Question

I have a number of test files, each with their own tests. Until now, each one has a trait in which I create a configuration object.

Building that object now takes the better part of two minutes, as it has to do a lot of work calling a number of databases (don't ask - really, it has to be done).

Is there a way to share this object (tldConfigMap, below) between multiple test suites in multiple files without having to build it over and over?

Here's how I was doing it - as you can see, when brought in as a trait, load() will be called every time:

trait TLDMapAcceptanceIsLoadedSpec extends org.scalatest.fixture.FlatSpecLike with TLDConfigMap {

  val tldConfigMap: Map[String, TLDConfig] = load(withAttributes = true).right.get

  type FixtureParam = Map[String, TLDConfig]

  def withFixture(test: OneArgTest) = {

    withFixture(test.toNoArgTest(tldConfigMap)) // "loan" the fixture to the test
  }
}

Answer 1

You could just put it into an object (assuming it's really config and isn't changed by tests):

object TldConfigMap {
  val tldConfigMap: Map[String, TLDConfig] = load(withAttributes = true).right.get
}

trait TLDMapAcceptanceIsLoadedSpec extends org.scalatest.fixture.FlatSpecLike with TLDConfigMap {

  def tldConfigMap: Map[String, TLDConfig] = TldConfigMap.tldConfigMap // or just use it directly

  type FixtureParam = Map[String, TLDConfig]

  def withFixture(test: OneArgTest) = {
    withFixture(test.toNoArgTest(tldConfigMap)) // "loan" the fixture to the test
  }
}