feat(multiplayer): verify ranked profile delivery

server/domain/tier_test.go

@@ -54,3 +54,10 @@ func TestTierPolicyRejectsUnorderedOrUnboundedConfiguration(t *testing.T) {
 		t.Fatal("negative ranked games accepted")
 	}
 }
+
+func TestDefaultTierPolicyUsesBackendLaunchBands(t *testing.T) {
+	tier, err := RankedTier(RankedProfile{Rating: Rating{Value: 1600}, RankedGames: 10}, DefaultTierPolicy())
+	if err != nil || tier != RankTierGold {
+		t.Fatalf("default tier = (%q, %v), want GOLD", tier, err)
+	}
+}