server: Disable database on MyAPISpec

server/test/controllers/common/MyAPISpec.scala

@@ -2,9 +2,13 @@ package controllers.common
 
 import com.alexitc.playsonify.test.PlayAPISpec
 import org.slf4j.LoggerFactory
+import play.api.db.{DBApi, Database, Databases}
+import play.api.inject.bind
+import play.api.inject.guice.GuiceApplicationBuilder
 import play.api.mvc.Result
 import play.api.test.FakeRequest
 import play.api.test.Helpers._
+import play.api.{Configuration, Environment, Mode}
 
 import scala.concurrent.Future
 
@@ -15,4 +19,32 @@ trait MyAPISpec extends PlayAPISpec {
   override protected def log[T](request: FakeRequest[T], response: Future[Result]): Unit = {
     logger.info(s"> REQUEST, $request; < RESPONSE, status = ${status(response)}, body = ${contentAsString(response)}")
   }
+
+  /**
+   * A dummy [[Database]] and [[DBApi]] just to allow a play application
+   * to start without connecting to a real database from application.conf.
+   */
+  private val dummyDB = Databases.inMemory()
+  private val dummyDBApi = new DBApi {
+    override def databases(): Seq[Database] = List(dummyDB)
+    override def database(name: String): Database = dummyDB
+    override def shutdown(): Unit = dummyDB.shutdown()
+  }
+
+  /**
+   * Loads configuration disabling evolutions on default database.
+   *
+   * This allows to not write a custom application.conf for testing
+   * and ensure play evolutions are disabled.
+   */
+  private def loadConfigWithoutEvolutions(env: Environment): Configuration = {
+    val map = Map("play.evolutions.db.default.enabled" -> false)
+
+    Configuration.load(env) ++ Configuration.from(map)
+  }
+
+  override val guiceApplicationBuilder: GuiceApplicationBuilder = GuiceApplicationBuilder(loadConfiguration = loadConfigWithoutEvolutions)
+      .in(Mode.Test)
+      .overrides(bind[Database].to(dummyDB))
+      .overrides(bind[DBApi].to(dummyDBApi))
 }