Preserve approved pixel tower prototype as development baseline

tests/run_tests.gd

@@ -0,0 +1,61 @@
+extends SceneTree
+
+var _failures := 0
+var _checks := 0
+
+func _initialize() -> void:
+	call_deferred("_run")
+
+func _run() -> void:
+	print("The Tree: automated checks")
+	_test_game_clock()
+	_test_game_state()
+	_test_facility_data()
+	load("res://tests/s0/test_kernel_and_save.gd").run(Callable(self, "_expect"))
+	if _failures == 0:
+		print("PASS: %d checks" % _checks)
+	else:
+		push_error("FAIL: %d of %d checks failed" % [_failures, _checks])
+	quit(_failures)
+
+func _test_game_clock() -> void:
+	var clock = load("res://autoload/game_clock.gd").new()
+	clock.reset(1, 6, 0)
+	_expect(clock.get_phase() == clock.Phase.MORNING, "06:00 is morning")
+	clock.advance_minutes(4 * 60)
+	_expect(clock.get_hour() == 10, "clock advances to 10:00")
+	_expect(clock.get_phase() == clock.Phase.DAY, "10:00 is day phase")
+	clock.set_speed(4)
+	_expect(clock.speed == 4, "clock accepts the specified x4 speed")
+	clock.set_speed(3)
+	_expect(clock.speed == 4, "clock rejects unsupported speed values")
+	clock.advance_minutes(14 * 60)
+	_expect(clock.day == 2 and clock.get_hour() == 0, "midnight starts the next day")
+	clock.free()
+
+func _test_game_state() -> void:
+	var state = load("res://autoload/game_state.gd").new()
+	state.reset()
+	_expect(state.can_afford({&"gold": 500, &"materials": 5}), "default resources can afford starter room")
+	_expect(state.spend({&"gold": 500, &"materials": 5}), "spending succeeds")
+	_expect(state.get_resource(&"gold") == 4500, "gold is deducted atomically")
+	_expect(not state.spend({&"mana": 1000}), "overspending is rejected")
+	state.free()
+
+func _test_facility_data() -> void:
+	var catalog_script = load("res://scripts/data/facility_catalog.gd")
+	var facilities: Array = catalog_script.load_all()
+	_expect(facilities.size() == 16, "MVP facility catalog loads all baseline definitions")
+	var seen_ids := {}
+	for facility in facilities:
+		_expect(facility.is_valid(), "%s has valid data" % facility.resource_path)
+		_expect(not seen_ids.has(facility.id), "%s has a unique id" % facility.id)
+		seen_ids[facility.id] = true
+
+func _expect(condition: bool, label: String) -> void:
+	_checks += 1
+	if condition:
+		print("  ✓ %s" % label)
+		return
+	_failures += 1
+	push_error("  ✗ %s" % label)