Add dedicated server runtime

tests/dedicated_server_client_validation.gd

@@ -0,0 +1,49 @@
+extends SceneTree
+
+const MainScene = preload("res://main/main.tscn")
+const TEST_ENDPOINT: String = "127.0.0.1:7777"
+const EXPECTED_SERVER_NAME: String = "Dedicated-Client-Test"
+
+
+func _initialize() -> void:
+	call_deferred("_run")
+
+
+func _run() -> void:
+	root.size = Vector2i(1280, 720)
+	var main: Node = MainScene.instantiate()
+	root.add_child(main)
+	for _frame: int in 4:
+		await process_frame
+	if not bool(main.get("_application_initialized")):
+		main.call("_activate_selected_data_path", "", true)
+	for _frame: int in 8:
+		await process_frame
+	assert(bool(main.get("_application_initialized")))
+	main.call("_on_title_join_game_requested", TEST_ENDPOINT)
+	var session := main.get_node("%NetworkSession") as NetworkSession
+	var joined: bool = false
+	var deadline: int = Time.get_ticks_msec() + 20000
+	while Time.get_ticks_msec() < deadline:
+		await process_frame
+		if session.state == NetworkSession.State.VERIFYING_SERVER_IDENTITY:
+			main.call("_confirm_server_trust")
+		if session.is_joined_client() and bool(main.get("_gameplay_started")):
+			joined = true
+			break
+	assert(joined)
+	assert(session.get_local_peer_id() > 1)
+	assert(session.get_player_count() == 1)
+	var metadata: Dictionary = session.get_last_server_metadata()
+	assert(str(metadata.get("server_display_name", "")) == EXPECTED_SERVER_NAME)
+	var spawn_service := main.get_node(
+		"%PlayerSpawnService"
+	) as PlayerSpawnService
+	assert(spawn_service.get_avatar(1) == null)
+	assert(spawn_service.get_avatar(session.get_local_peer_id()) != null)
+	print("DEDICATED_SERVER_CLIENT_VALIDATION_OK")
+	session.disconnect_session("Dedicated client validation complete.")
+	main.queue_free()
+	for _frame: int in 4:
+		await process_frame
+	quit()