Add game repo tests and implementation

system/src/main/scala/GameRepo.scala

@@ -0,0 +1,17 @@
+package lila.system
+package repo
+
+import model._
+
+import com.novus.salat._
+import com.novus.salat.global._
+import com.novus.salat.dao._
+import com.mongodb.casbah.MongoCollection
+import com.mongodb.casbah.Imports._
+
+class GameRepo(collection: MongoCollection) extends SalatDAO[Game, String](collection) {
+
+  def game(id: String): Option[Game] = findOneByID(id)
+
+  def anyGame = findOne(DBObject())
+}

system/src/test/scala/GameRepoTest.scala

@@ -0,0 +1,23 @@
+package lila.system
+
+class GameRepoTest extends SystemTest {
+
+  val env = SystemEnv()
+  val repo = env.gameRepo
+  val anyGame = repo.anyGame.get
+
+  "the game repo" should {
+    "find a game" in {
+      "by ID" in {
+        "non existing" in {
+          repo game "haha" must beNone
+        }
+        "existing" in {
+          repo game anyGame.id must beSome.like {
+            case g ⇒ g.id must_== anyGame.id
+          }
+        }
+      }
+    }
+  }
+}