MVP1/Assets/Scripts/Modules/Tests/ModuleTests.cs

using System;
using System.Collections.Generic;
using Bogatyri.World;
using NUnit.Framework;

// Тесты модулей без Unity-сцены. Запуск: Window -> General -> Test Runner -> EditMode -> Run All.
// Список тестов, которые команда решила добавить (план от 19.10.2026), -- в Docs/Modules/README.md.
public class ModuleTests
{
    [SetUp]
    public void ResetCore()
    {
        GameServices.Clear();
        EventBus.Clear();
        SaveRegistry.Clear();
    }

    // ---------------- Армия: один солдат не может быть в двух местах ----------------

    [Test]
    public void ArmyMath_TakeProportional_NeverDoubleCountsOrLosesSoldiers()
    {
        var rnd = new Random(1);
        for (int run = 0; run < 2000; run++)
        {
            var troops = new int[4];
            int total = 0;
            for (int i = 0; i < 4; i++) { troops[i] = rnd.Next(0, 50); total += troops[i]; }
            if (total == 0) continue;

            int count = rnd.Next(1, total + 1);
            int[] taken = ArmyMath.TakeProportional(troops, count);

            int sum = 0;
            for (int i = 0; i < 4; i++)
            {
                Assert.That(taken[i], Is.InRange(0, troops[i]), "нельзя взять больше, чем есть в типе");
                sum += taken[i];
            }
            Assert.AreEqual(count, sum, "в поход уходит ровно столько, сколько просили");
        }
    }

    [Test]
    public void ArmyMath_TakeMoreThanExists_ReturnsNull()
    {
        Assert.IsNull(ArmyMath.TakeProportional(new[] { 1, 1, 0, 0 }, 3));
    }

    [Test]
    public void ArmyMath_SplitSurvivors_ReturnsExactlySurvivors()
    {
        int[] back = ArmyMath.SplitSurvivors(new[] { 10, 5, 0, 1 }, 9);
        int sum = 0;
        foreach (var b in back) { Assert.GreaterOrEqual(b, 0); sum += b; }
        Assert.AreEqual(9, sum);
    }

    [Test]
    public void ArmyService_MarchNeverCreatesOrLosesSoldiers()
    {
        var army = new ArmyService();
        army.AddTroops(0, 20); army.AddTroops(1, 7); army.AddTroops(3, 3);
        int total = army.SoldiersAtHome;

        Assert.IsTrue(army.TakeForMarch(1, 12));
        Assert.AreEqual(total, army.SoldiersAtHome + army.TroopsInMarches, "солдат либо дома, либо в походе");

        army.ReturnFromMarch(1, 12);
        Assert.AreEqual(total, army.SoldiersAtHome);
        Assert.AreEqual(0, army.TroopsInMarches);

        Assert.IsFalse(army.TakeForMarch(2, total + 1), "нельзя отправить больше, чем есть");
    }

    [Test]
    public void ArmyService_LoseFraction_FloorsPerType()
    {
        var army = new ArmyService();
        army.AddTroops(0, 10); army.AddTroops(1, 5);
        int lost = army.LoseFraction(0.25);
        Assert.AreEqual(2 + 1, lost); // floor(2.5) + floor(1.25)
        Assert.AreEqual(8, army.GetTroops(0));
        Assert.AreEqual(4, army.GetTroops(1));
    }

    [Test]
    public void ArmyService_SaveRestore_KeepsTroopsAndMarches()
    {
        var a = new ArmyService();
        a.AddTroops(0, 9); a.AddTroops(2, 4);
        a.TakeForMarch(5, 6);

        var b = new ArmyService();
        b.Restore(a.Capture());
        Assert.IsTrue(b.RestoredFromSave);
        Assert.AreEqual(a.SoldiersAtHome, b.SoldiersAtHome);
        Assert.AreEqual(a.TroopsInMarches, b.TroopsInMarches);

        b.ReturnFromMarch(5, 6);
        Assert.AreEqual(13, b.SoldiersAtHome, "состав похода сохранился");
    }

    [Test]
    public void ArmyService_ImportLegacy_AndReset()
    {
        var army = new ArmyService();
        int events = 0;
        EventBus.Subscribe<TroopsChangedEvent>(_ => events++);

        army.ImportLegacy(new[] { 5, 0, 2, 0 }, new[] { new KeyValuePair<int, int[]>(3, new[] { 1, 1, 0, 0 }) });
        Assert.AreEqual(7, army.SoldiersAtHome);
        Assert.AreEqual(2, army.TroopsInMarches);
        Assert.Greater(events, 0, "изменение войск сообщается событием");

        army.ResetState();
        Assert.AreEqual(0, army.SoldiersAtHome + army.TroopsInMarches);
    }

    // Решение команды от 19.10.2026: один солдат -- в одном месте. 30 солдат, 10 в гарнизон -> 20 доступны, всего 30.
    [Test]
    public void ArmyService_Garrison_OneSoldierInOnePlace()
    {
        var army = new ArmyService();
        army.AddTroops(0, 20); army.AddTroops(1, 10);

        Assert.AreEqual(10, army.SetGarrison(10));
        Assert.AreEqual(10, army.GarrisonTotal);
        Assert.AreEqual(20, army.AvailableForMarch);
        Assert.AreEqual(30, army.SoldiersAtHome, "всего воинов столько же");
        Assert.AreEqual(7, army.GetGarrison(0), "гарнизон по составу: 2/3 пехоты");
        Assert.AreEqual(3, army.GetGarrison(1), "и 1/3 лучников");

        Assert.IsFalse(army.TakeForMarch(1, 21), "гарнизон в поход не уходит");
        Assert.IsTrue(army.TakeForMarch(1, 20));
        Assert.AreEqual(0, army.AvailableForMarch);
        Assert.AreEqual(10, army.GarrisonTotal, "гарнизон остался в городе");
        Assert.AreEqual(30, army.SoldiersAtHome + army.TroopsInMarches);

        Assert.AreEqual(10, army.SetGarrison(99), "гарнизон не больше воинов в городе");

        army.LoseFraction(0.5);
        Assert.LessOrEqual(army.GarrisonTotal, army.SoldiersAtHome, "после потерь гарнизон не больше войск");
        for (int i = 0; i < 4; i++) Assert.LessOrEqual(army.GetGarrison(i), army.GetTroops(i));

        var loaded = new ArmyService();
        loaded.Restore(army.Capture());
        Assert.AreEqual(army.GarrisonTotal, loaded.GarrisonTotal, "гарнизон сохраняется");

        loaded.Restore("troops=5,0,0,0\n"); // старое сохранение без строки гарнизона
        Assert.AreEqual(0, loaded.GarrisonTotal);
        Assert.AreEqual(5, loaded.AvailableForMarch);
    }

    // ---------------- Армия: безопасная отправка и возвращение (ревью 27.10.2026, п. 2.1-2.2) ----------------

    [Test]
    public void ArmyService_UnknownMarch_ReturnsNobody()
    {
        var army = new ArmyService();
        army.AddTroops(0, 5);

        Assert.IsFalse(army.ReturnFromMarch(42, 10), "неизвестный поход");
        Assert.IsFalse(army.ReturnUnits(42, new[] { 3, 3, 3, 3 }), "неизвестный поход");
        Assert.AreEqual(5, army.SoldiersAtHome, "из ниоткуда никто не появился");
    }

    [Test]
    public void ArmyService_SameMarch_IsCreditedOnlyOnce()
    {
        var army = new ArmyService();
        army.AddTroops(0, 10); army.AddTroops(1, 10);

        Assert.IsTrue(army.TakeForMarch(1, 10));
        Assert.IsTrue(army.ReturnUnits(1, army.GetMarchUnits(1)));
        Assert.IsFalse(army.ReturnUnits(1, new[] { 5, 5, 0, 0 }), "повторное событие возвращения");
        Assert.IsFalse(army.ReturnFromMarch(1, 10), "и по другому пути -- тоже нет");
        Assert.AreEqual(20, army.SoldiersAtHome + army.TroopsInMarches);

        Assert.IsTrue(army.TakeForMarch(2, 10));
        Assert.IsTrue(army.ReturnFromMarch(2, 99), "вернулось больше, чем ушло");
        Assert.AreEqual(20, army.SoldiersAtHome, "больше, чем ушло, не вернётся");
    }

    [Test]
    public void ArmyService_TakeForMarch_SameIdTwice_IsRejected()
    {
        var army = new ArmyService();
        army.AddTroops(0, 20);

        Assert.IsTrue(army.TakeForMarch(7, 5));
        Assert.IsFalse(army.TakeForMarch(7, 5), "второй поход с тем же номером затёр бы первый");
        Assert.AreEqual(15, army.SoldiersAtHome);
        Assert.AreEqual(5, army.TroopsInMarches);
    }

    [Test]
    public void World_CancelMarch_OnlyBeforeBattle()
    {
        var world = new WorldSimulation(WorldMapLayout.CreateDefault(), new BattleSystem());
        MarchData m = world.StartMarch("p", WorldMapLayout.PlayerCityId, WorldMapLayout.BossCastleId, 5, 0, out _);
        Assert.IsTrue(world.CancelMarch(m.id));
        Assert.AreEqual(0, world.Marches.Count);

        MarchData fought = world.StartMarch("p", WorldMapLayout.PlayerCityId, WorldMapLayout.BossCastleId, 5, 0, out _);
        world.Advance(fought.arriveMs, new List<WorldEvent>()); // бой прошёл, войско идёт домой
        Assert.IsFalse(world.CancelMarch(fought.id), "после боя поход не отменяется");
    }

    // ---------------- Боевая система ----------------

    [Test]
    public void Battle_MoreSoldiersWins_TieGoesToDefender()
    {
        var battle = new BattleSystem();
        Assert.IsTrue(battle.Resolve(new BattleRequest { Attackers = 30, Defenders = 20 }).Victory);
        Assert.IsFalse(battle.Resolve(new BattleRequest { Attackers = 20, Defenders = 20 }).Victory);
        Assert.AreEqual(20, battle.Resolve(new BattleRequest { Attackers = 30, Defenders = 20 }).Survivors);
    }

    [Test]
    public void Battle_Counters_ArchersBeatInfantry_InfantryBeatsCavalry()
    {
        var battle = new BattleSystem();
        // Одинаковая "сырая" сила: 25 лучников x5 = 125 против ~31 пехоты x4 = 124
        var archersVsInfantry = battle.Resolve(new BattleRequest
            { AttackerUnits = new[] { 0, 25, 0, 0 }, DefenderUnits = new[] { 32, 0, 0, 0 } });
        Assert.IsTrue(archersVsInfantry.Victory, "лучники с контрой бьют чуть более сильную пехоту");

        var cavalryVsInfantry = battle.Resolve(new BattleRequest
            { AttackerUnits = new[] { 0, 0, 14, 0 }, DefenderUnits = new[] { 30, 0, 0, 0 } });
        Assert.IsFalse(cavalryVsInfantry.Victory, "пехота с контрой держит чуть более сильную кавалерию");
    }

    [Test]
    public void Battle_WallsHelpDefenders_SiegeBreaksWalls()
    {
        var battle = new BattleSystem();
        var field = battle.Resolve(new BattleRequest { AttackerUnits = new[] { 22, 0, 0, 0 }, DefenderUnits = new[] { 20, 0, 0, 0 } });
        var walls = battle.Resolve(new BattleRequest { AttackerUnits = new[] { 22, 0, 0, 0 }, DefenderUnits = new[] { 20, 0, 0, 0 }, DefenderFortified = true });
        Assert.IsTrue(field.Victory);
        Assert.IsFalse(walls.Victory, "те же войска за стенами устояли");

        var siege = battle.Resolve(new BattleRequest { AttackerUnits = new[] { 0, 0, 0, 6 }, DefenderUnits = new[] { 20, 0, 0, 0 }, DefenderFortified = true });
        var siegeField = battle.Resolve(new BattleRequest { AttackerUnits = new[] { 0, 0, 0, 6 }, DefenderUnits = new[] { 20, 0, 0, 0 } });
        Assert.Greater(siege.AttackerPower, siegeField.AttackerPower, "осадные сильнее против стен, чем в поле");
    }

    [Test]
    public void Battle_LossesPerType_NeverExceedUnits_AndSumUp()
    {
        var battle = new BattleSystem();
        var rnd = new Random(7);
        for (int run = 0; run < 500; run++)
        {
            var att = new int[4]; var def = new int[4];
            for (int i = 0; i < 4; i++) { att[i] = rnd.Next(0, 30); def[i] = rnd.Next(0, 30); }
            var o = battle.Resolve(new BattleRequest { AttackerUnits = att, DefenderUnits = def, DefenderFortified = rnd.Next(2) == 0 });

            int survivors = 0, defLost = 0;
            for (int i = 0; i < 4; i++)
            {
                Assert.That(o.AttackerSurvivorUnits[i], Is.InRange(0, att[i]));
                Assert.That(o.DefenderLossUnits[i], Is.InRange(0, def[i]));
                survivors += o.AttackerSurvivorUnits[i]; defLost += o.DefenderLossUnits[i];
            }
            Assert.AreEqual(o.Survivors, survivors);
            Assert.AreEqual(o.DefenderLosses, defLost);
            Assert.AreEqual(att[0] + att[1] + att[2] + att[3] - o.AttackerLosses, o.Survivors);
        }
    }

    // Малые отряды, пустые стороны, ничья, предельные бонусы (ревью 27.10.2026, п. 2.4).
    // Проверяем только то, что не зависит от будущей формулы потерь: исход и арифметику.
    // Сколько теряет одиночка-проигравший -- решение команды (правило округления), тест его не фиксирует.
    [Test]
    public void Battle_EdgeCases_OutcomeAndArithmetic()
    {
        var b = new BattleSystem();
        var cases = new[]
        {
            new BattleRequest { AttackerUnits = new[] { 1, 0, 0, 0 }, DefenderUnits = new[] { 1, 0, 0, 0 } },           // 1 x 1
            new BattleRequest { AttackerUnits = new[] { 1, 0, 0, 0 }, DefenderUnits = new[] { 10, 0, 0, 0 } },          // 1 x 10
            new BattleRequest { AttackerUnits = new[] { 10, 0, 0, 0 }, DefenderUnits = new[] { 1, 0, 0, 0 } },          // 10 x 1
            new BattleRequest { AttackerUnits = new[] { 0, 0, 0, 0 }, DefenderUnits = new[] { 0, 0, 0, 0 } },           // 0 x 0
            new BattleRequest { AttackerUnits = new[] { 0, 0, 0, 0 }, DefenderUnits = new[] { 5, 0, 0, 0 } },           // 0 x 5
            new BattleRequest { AttackerUnits = new[] { 5, 0, 0, 0 }, DefenderUnits = new[] { 0, 0, 0, 0 } },           // 5 x 0
            new BattleRequest { AttackerUnits = new[] { 3, 2, 1, 1 }, DefenderUnits = new[] { 2, 2, 2, 1 }, DefenderFortified = true },
            new BattleRequest { AttackerUnits = new[] { 5, 0, 0, 0 }, DefenderUnits = new[] { 5, 0, 0, 0 }, AttackerBonusPercent = -100 },
            new BattleRequest { AttackerUnits = new[] { 5, 0, 0, 0 }, DefenderUnits = new[] { 5, 0, 0, 0 }, AttackerBonusPercent = -500, DefenderBonusPercent = -500 },
            new BattleRequest { AttackerUnits = new[] { 1, 0, 0, 0 }, DefenderUnits = new[] { 50, 50, 50, 50 }, AttackerBonusPercent = 100000 },
            new BattleRequest { Attackers = 7, Defenders = 7 },                                                        // старый бой числом
        };

        foreach (var r in cases)
        {
            BattleOutcome o = b.Resolve(r);
            int[] att = r.AttackerUnits ?? new[] { r.Attackers, 0, 0, 0 };
            int[] def = r.DefenderUnits ?? new[] { r.Defenders, 0, 0, 0 };

            Assert.GreaterOrEqual(o.AttackerPower, 0);
            Assert.GreaterOrEqual(o.DefenderPower, 0);
            Assert.AreEqual(o.AttackerPower > o.DefenderPower, o.Victory, "побеждает большая сила, ничья -- защитнику");

            int survivors = 0, defLost = 0;
            for (int i = 0; i < 4; i++)
            {
                Assert.That(o.AttackerSurvivorUnits[i], Is.InRange(0, att[i]), "выжившие атакующего в пределах состава");
                Assert.That(o.DefenderLossUnits[i], Is.InRange(0, def[i]), "потери защитника в пределах состава");
                survivors += o.AttackerSurvivorUnits[i];
                defLost += o.DefenderLossUnits[i];
            }
            Assert.AreEqual(o.Survivors, survivors);
            Assert.AreEqual(o.DefenderLosses, defLost);
            Assert.AreEqual(att[0] + att[1] + att[2] + att[3], o.Survivors + o.AttackerLosses, "выжившие + погибшие = ушедшие");
        }

        // Ничья 1 x 1 -- победа защитника; пустая сторона никого не теряет
        Assert.IsFalse(b.Resolve(cases[0]).Victory);
        Assert.IsFalse(b.Resolve(cases[3]).Victory);
        Assert.AreEqual(0, b.Resolve(cases[3]).AttackerLosses + b.Resolve(cases[3]).DefenderLosses);
        Assert.IsTrue(b.Resolve(cases[5]).Victory, "на пустую цель -- победа");
        Assert.AreEqual(0, b.Resolve(cases[5]).AttackerLosses, "на пустую цель -- без потерь");
        Assert.IsFalse(b.Resolve(cases[8]).Victory, "обе силы обнулились -- ничья, защитнику");
    }

    [Test]
    public void World_GarrisonComposition_SumsToGarrison_AndIsStable()
    {
        foreach (var node in WorldMapLayout.CreateDefault())
        {
            int[] a = WorldMapLayout.GarrisonUnits(node);
            int[] b = WorldMapLayout.GarrisonUnits(node);
            int sum = 0;
            for (int i = 0; i < 4; i++) { Assert.GreaterOrEqual(a[i], 0); Assert.AreEqual(a[i], b[i]); sum += a[i]; }
            Assert.AreEqual(node.garrison, sum, node.displayName);
        }
    }

    // ---------------- Глобальный мир: лагеря разбойников ----------------

    [Test]
    public void World_Camps_AreSpreadOut_FightInField_WithoutSiege()
    {
        var nodes = WorldMapLayout.CreateDefault();
        int camps = 0;
        foreach (var camp in nodes)
        {
            if (camp.type != MapNodeType.Camp) continue;
            camps++;
            Assert.IsFalse(WorldMapLayout.IsFortified(camp), "лагерь -- бой в поле");
            Assert.AreEqual(0, WorldMapLayout.GarrisonUnits(camp)[TroopType.Siege], "у разбойников нет осадных");
            Assert.That(camp.level, Is.InRange(1, WorldMapLayout.CampLevels));
            foreach (var other in nodes)
            {
                if (other == camp) continue;
                int min = other.type == MapNodeType.BossCastle ? 4500 : 2600;
                Assert.GreaterOrEqual(WorldMapLayout.Distance(camp, other), min - 1, camp.id + " слишком близко к " + other.id);
            }
        }
        Assert.AreEqual(WorldMapLayout.CampCount, camps);
    }

    [Test]
    public void World_CampCleared_SecondMarchFindsItEmpty_ThenItRespawns()
    {
        var world = new WorldSimulation(WorldMapLayout.CreateDefault(), new BattleSystem());
        const string camp = "camp_1"; // 1 уровень, 6..9 разбойников
        MarchData first = world.StartMarch("p", WorldMapLayout.PlayerCityId, camp, 30, 0, out string e1);
        MarchData second = world.StartMarch("p", WorldMapLayout.PlayerCityId, camp, 30, 1, out string e2);
        Assert.IsNotNull(first, e1);
        Assert.IsNotNull(second, e2);

        world.Advance(10 * 60_000, new List<WorldEvent>()); // через 10 минут оба похода закончились
        Assert.IsTrue(first.victory);
        Assert.IsNotEmpty(first.loot);
        Assert.IsTrue(second.targetEmpty, "второе войско пришло к уже разбитому лагерю");
        Assert.AreEqual(30, second.survivors);
        Assert.IsEmpty(second.loot);

        Assert.IsTrue(world.IsCampCleared(camp, 10 * 60_000));
        Assert.IsNull(world.StartMarch("p", WorldMapLayout.PlayerCityId, camp, 30, 10 * 60_000, out _), "разбитый лагерь не атакуется");

        // Сохранение: другой мир с теми же данными помнит разбитый лагерь
        var loaded = new WorldSimulation(WorldMapLayout.CreateDefault(), new BattleSystem());
        loaded.LoadCampStates(world.GetCampStates());
        Assert.IsTrue(loaded.IsCampCleared(camp, 10 * 60_000));

        long respawn = first.arriveMs + CampRules.RespawnMs;
        Assert.IsFalse(world.IsCampCleared(camp, respawn), "лагерь появился снова");
        Assert.IsNotNull(world.StartMarch("p", WorldMapLayout.PlayerCityId, camp, 30, respawn, out _));
    }

    // ---------------- Глобальный мир: поход до конца, в том числе офлайн ----------------

    [Test]
    public void World_MarchResolvesAndReturns_EvenAfterLongOffline()
    {
        var world = new WorldSimulation(WorldMapLayout.CreateDefault(), new BattleSystem());
        MarchData march = world.StartMarch("p", WorldMapLayout.PlayerCityId, WorldMapLayout.BossCastleId, 30, 0, out string error);
        Assert.IsNotNull(march, error);

        var events = new List<WorldEvent>();
        world.Advance(3_600_000, events); // игра была закрыта час

        Assert.AreEqual(2, events.Count, "бой и возвращение за один вызов");
        Assert.AreEqual(WorldEventType.BattleResolved, events[0].Type);
        Assert.AreEqual(WorldEventType.MarchReturned, events[1].Type);
        Assert.AreEqual(0, world.Marches.Count);
    }

    // ---------------- Чат ----------------

    [Test]
    public void Chat_EmptyMessage_IsRejected()
    {
        var chat = new ChatService(0);
        int before = chat.GetMessages(ChatChannel.World).Count;
        Assert.IsFalse(chat.Send(ChatChannel.World, "   "));
        Assert.AreEqual(before, chat.GetMessages(ChatChannel.World).Count);
    }

    [Test]
    public void Chat_Send_TrimsCutsAndPublishesEvent()
    {
        var chat = new ChatService(0);
        ChatMessage received = null;
        EventBus.Subscribe<ChatMessageReceivedEvent>(e => received = e.Message);

        Assert.IsTrue(chat.Send(ChatChannel.Circle, "  " + new string('а', 500) + "  "));

        Assert.IsNotNull(received, "событие о новом сообщении");
        Assert.AreEqual(ChatChannel.Circle, received.channel);
        Assert.AreEqual(LocalPlayer.Id, received.senderId);
        Assert.AreEqual(chat.MaxMessageLength, received.text.Length, "длинное сообщение обрезается");
    }

    [Test]
    public void Chat_KeepsOnlyLastMessagesPerChannel()
    {
        var chat = new ChatService(0);
        for (int i = 0; i < 250; i++) chat.Send(ChatChannel.World, "сообщение " + i);

        var world = chat.GetMessages(ChatChannel.World);
        Assert.AreEqual(ChatService.MaxStoredPerChannel, world.Count);
        Assert.AreEqual("сообщение 249", world[world.Count - 1].text);
    }

    // ---------------- Круг ----------------

    [Test]
    public void Circle_CreateMakesPlayerLeader_AndCannotJoinSecond()
    {
        var circle = new CircleService();
        Assert.IsFalse(circle.IsInCircle);

        Assert.IsTrue(circle.TryCreate("  Дружина  ", out string error), error);
        Assert.IsTrue(circle.IsInCircle);
        Assert.IsTrue(circle.IsLeader);
        Assert.AreEqual("Дружина", circle.Current.name);

        Assert.IsFalse(circle.TryJoin("circle_1", out _), "нельзя состоять в двух Кругах");
        Assert.IsFalse(circle.TryCreate("Ещё один", out _));
    }

    [Test]
    public void Circle_NameValidation()
    {
        var circle = new CircleService();
        Assert.IsFalse(circle.TryCreate("ab", out _), "слишком короткое");
        Assert.IsFalse(circle.TryCreate(new string('я', 30), out _), "слишком длинное");
        Assert.IsFalse(circle.TryCreate("Круг Перуна", out _), "такое название уже есть");
        Assert.IsFalse(circle.TryCreate("a|b<c>", out _), "недопустимые символы");
    }

    [Test]
    public void Circle_JoinFullCircle_IsRejected()
    {
        var circle = new CircleService();
        CircleInfo full = circle.GetCircles()[circle.GetCircles().Count - 1];
        Assert.AreEqual(circle.MaxMembers, full.members.Count);
        Assert.IsFalse(circle.TryJoin(full.id, out _));
    }

    [Test]
    public void Circle_LeaveAlone_Disbands_LeaveAsMember_KeepsCircle()
    {
        var circle = new CircleService();
        int before = circle.GetCircles().Count;
        bool disbanded = false;
        EventBus.Subscribe<CircleLeftEvent>(e => disbanded = e.Disbanded);

        circle.TryCreate("Дружина", out _);
        circle.Leave();
        Assert.IsTrue(disbanded);
        Assert.AreEqual(before, circle.GetCircles().Count, "свой Круг распущен");

        circle.TryJoin("circle_1", out _);
        int members = circle.Current.members.Count;
        circle.Leave();
        Assert.IsFalse(disbanded);
        Assert.AreEqual(members - 1, circle.GetCircles()[0].members.Count);
    }

    [Test]
    public void Circle_SaveAndRestore_KeepsMembership()
    {
        var a = new CircleService();
        a.TryCreate("Дружина", out _);
        string saved = a.Capture();

        var b = new CircleService();
        b.Restore(saved);
        Assert.IsTrue(b.IsInCircle);
        Assert.IsTrue(b.IsLeader);
        Assert.AreEqual("Дружина", b.Current.name);

        var c = new CircleService();
        c.TryJoin("circle_3", out _);
        var d = new CircleService();
        d.Restore(c.Capture());
        Assert.AreEqual("circle_3", d.Current.id);
        Assert.IsFalse(d.IsLeader);
    }

    [Test]
    public void Chat_CircleChannel_OnlyWhenInCircle()
    {
        var circle = new CircleService();
        GameServices.Register<ICircle>(circle);
        var chat = new ChatService(0);

        Assert.IsFalse(chat.Send(ChatChannel.Circle, "привет"), "без Круга писать нельзя");
        circle.TryJoin("circle_1", out _);
        Assert.AreEqual(1, chat.GetMessages(ChatChannel.Circle).Count, "системное сообщение о вступлении");
        Assert.IsTrue(chat.Send(ChatChannel.Circle, "привет"));
        Assert.IsTrue(chat.Send(ChatChannel.World, "всем привет"), "общий чат доступен всегда");
    }

    // ---------------- Ядро ----------------

    [Test]
    public void EventBus_FailingSubscriberDoesNotBreakOthers()
    {
        int delivered = 0;
        Exception caught = null;
        EventBus.OnHandlerError = e => caught = e;
        EventBus.Subscribe<MarchReturnedEvent>(_ => throw new InvalidOperationException("boom"));
        EventBus.Subscribe<MarchReturnedEvent>(_ => delivered++);

        EventBus.Publish(new MarchReturnedEvent { Survivors = 5 });

        Assert.AreEqual(1, delivered);
        Assert.IsNotNull(caught);
    }

    [Test]
    public void GameServices_MissingModule_ThrowsClearError()
    {
        Assert.Throws<InvalidOperationException>(() => GameServices.Get<IArmy>());
        Assert.IsFalse(GameServices.TryGet(out IArmy _));
    }
}