Play scala integration spec - Injecting dependencies through Guice - scala

Question

I use Scala, Play 2.4, and Slick 3 in my project. I have following DAO code and it works fine from end to end.
#Singleton()
class CompaniesDAO #Inject() (protected val dbConfigProvider: DatabaseConfigProvider) extends CompaniesComponent
with HasDatabaseConfigProvider[JdbcProfile] {
import driver.api._
}
However, I can't get it working as expected in my integration test because of dbConfig stuff. My integration test is below:
class CompaniesDaoIntegrationSpec extends FunSpec with OneServerPerSuite {
def companiesDao(implicit app: Application) = {
val app2CompaniesDAO = Application.instanceCache[CompaniesDAO]
app2CompaniesDAO(app)
}
describe("create") {
it("should create ") {
companiesDao.create...
}
}
}
If I don't put db properties in application.conf I got the following error:
[info] java.lang.RuntimeException: com.google.inject.ProvisionException: Unable to provision, see the following errors:
[info]
[info] 1) No implementation for play.api.db.slick.DatabaseConfigProvider was bound.
[info] while locating play.api.db.slick.DatabaseConfigProvider
[info] for parameter 0 at
It seems given the above code, Play application reads the db properties from configuration file which is located at /conf/application.conf.
My project setup is a bit different to this, as we have multiple environments so we have file structuers like:
/conf/local/application.conf
/conf/testing/application.conf
/conf/staging/application.conf
/conf/production/application.conf
When we run the play application using command like: activator run -Dconfig.resource=/conf/local/application.conf and everything work fine.
I want to do the same for integration spec like: activator test -Dconfig.resource=/conf/local/application.conf.
Play will read the specified config to run integration tests.
What's the best way to achieve that?

Answer 1

You have to make a trait and mix it in the test, and then it will work.
trait WithDatabaseConfig {
lazy val (driver, db) = {
val dbConfig = DatabaseConfigProvider.get[JdbcProfile](Play.current)
(dbConfig.driver, dbConfig.db)
}
}
I have no idea why, I'm a Scala beginner. Probably has to do something with not/running app or Guice. Found it in their samples folder at https://github.com/playframework/play-slick/blob/1.1.x/samples/json/test/DBSpec.scala