I am using Play 2.5.10, Play-slick 2.0.2, and my activator-generated project comes with scalatest and code like this:
class TestSpec extends PlaySpec with OneAppPerSuite {...}
I managed to test routes/Actions; now I would test DAO methods on a lower level. I searched the web and SO for a solution, and could not find any that is still up-to-date. A DAO signature is like this:
class TestDAO @Inject()(protected val dbConfigProvider: DatabaseConfigProvider) extends HasDatabaseConfigProvider[JdbcProfile]
so I need to pass it the dbConfigProvider
thing.
For some reason I can't inject the provider into the tests like we do in controllers (no error, tests just won't run):
class TestSpec @Inject()(dbConfigProvider: DatabaseConfigProvider) extends PlaySpec with OneAppPerSuite {...}
The Play-Slick docs say we can alternatively use a global lookup
val dbConfig = DatabaseConfigProvider.get[JdbcProfile](Play.current)
but it won't work directly because
There is no started application
and link to an example project doing that:
class TestDAOSpec extends Specification {
"TestDAO" should {
"work as expected" in new WithApplicationLoader { // implicit 'app'
val app2dao = Application.instanceCache[TestDAO].apply(app)
but I could never find the WithApplicationLoader
. Instead, there seems to be a WithApplication
:
class TestDAOSpec extends Specification {
"TestDAO" should {
"work as expected" in new WithApplication() { // implicit 'app'
val app2dao = Application.instanceCache[TestDAO].apply(app)
but then I get
Type mismatch: expected a play.api.Application, got: play.Application.
At this point I lost hope.
How can I test a DAO?
N.B. I don't need to switch databases for testing (I handle this via config), I just want to access the default database in tests.
You can use:
lazy val appBuilder: GuiceApplicationBuilder = new GuiceApplicationBuilder().in(Mode.Test)
lazy val injector: Injector = appBuilder.injector()
lazy val dbConfProvider: DatabaseConfigProvider = injector.instanceOf[DatabaseConfigProvider]
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