feat(subscribe): add episode priority tracking for subscription updates

tests/test_subscribe_chain.py

@@ -1,175 +1,492 @@
+import importlib.util
+import sys
+import types
+from pathlib import Path
 from types import SimpleNamespace
 from unittest import TestCase
+from unittest.mock import patch
 
-from app.chain.subscribe import SubscribeChain
-from app.core.metainfo import MetaInfo
+from app.schemas.types import MediaType
+
+
+def _load_subscribe_chain_class():
+    """隔离加载 SubscribeChain，避免测试依赖完整运行时环境。"""
+    module_name = "_test_subscribe_chain"
+    if module_name in sys.modules:
+        module = sys.modules[module_name]
+        return module, module.SubscribeChain
+
+    injected_modules = {}
+
+    def ensure_module(name: str, module: types.ModuleType):
+        if name in sys.modules:
+            return sys.modules[name]
+        sys.modules[name] = module
+        injected_modules[name] = module
+        return module
+
+    chain_module = ensure_module("app.chain", types.ModuleType("app.chain"))
+
+    class _ChainBase:
+        def __init__(self):
+            self.messagehelper = SimpleNamespace(put=lambda *args, **kwargs: None)
+
+        def post_message(self, *args, **kwargs):
+            return None
+
+        async def async_post_message(self, *args, **kwargs):
+            return None
+
+    chain_module.ChainBase = _ChainBase
+
+    interaction_module = ensure_module("app.helper.interaction", types.ModuleType("app.helper.interaction"))
+
+    class _SlashInteractionManager:
+        def create_or_replace(self, *args, **kwargs):
+            return SimpleNamespace(request_id="request-id")
+
+        def get_by_id(self, *args, **kwargs):
+            return None
+
+        def get_by_user(self, *args, **kwargs):
+            return None
+
+        def remove(self, *args, **kwargs):
+            return None
+
+    interaction_module.SlashInteractionManager = _SlashInteractionManager
+    interaction_module.build_navigation_buttons = lambda *args, **kwargs: []
+    interaction_module.format_markdown_table = lambda *args, **kwargs: ""
+    interaction_module.page_items = lambda *args, **kwargs: []
+    interaction_module.supports_interaction_buttons = lambda *args, **kwargs: False
+    interaction_module.supports_markdown = lambda *args, **kwargs: False
+    interaction_module.update_or_post_message = lambda *args, **kwargs: None
+
+    config_module = ensure_module("app.core.config", types.ModuleType("app.core.config"))
+    config_module.global_vars = SimpleNamespace(is_system_stopped=False)
+    config_module.settings = SimpleNamespace(
+        RECOGNIZE_SOURCE="themoviedb",
+        MP_DOMAIN=lambda path: path,
+    )
+
+    context_module = ensure_module("app.core.context", types.ModuleType("app.core.context"))
+    context_module.TorrentInfo = SimpleNamespace
+    context_module.Context = SimpleNamespace
+    context_module.MediaInfo = SimpleNamespace
+
+    event_module = ensure_module("app.core.event", types.ModuleType("app.core.event"))
+
+    class _EventManager:
+        @staticmethod
+        def send_event(*args, **kwargs):
+            return None
+
+        @staticmethod
+        async def async_send_event(*args, **kwargs):
+            return None
+
+        @staticmethod
+        def register(*args, **kwargs):
+            def decorator(func):
+                return func
+
+            return decorator
+
+    event_module.eventmanager = _EventManager()
+    event_module.Event = SimpleNamespace
+
+    meta_module = ensure_module("app.core.meta", types.ModuleType("app.core.meta"))
+    meta_module.MetaBase = SimpleNamespace
+
+    metainfo_module = ensure_module("app.core.metainfo", types.ModuleType("app.core.metainfo"))
+    metainfo_module.MetaInfo = lambda *args, **kwargs: SimpleNamespace(episode_list=[])
+
+    words_module = ensure_module("app.core.meta.words", types.ModuleType("app.core.meta.words"))
+
+    class _WordsMatcher:
+        def prepare(self, title, custom_words=None):
+            return title, []
+
+    words_module.WordsMatcher = _WordsMatcher
+
+    schemas_module = ensure_module("app.schemas", types.ModuleType("app.schemas"))
+
+    class _Notification:
+        def __init__(self, *args, **kwargs):
+            self.args = args
+            self.kwargs = kwargs
+
+    class _SubscribeSchema:
+        def __init__(self, **kwargs):
+            for key, value in kwargs.items():
+                setattr(self, key, value)
+
+    class _NotExistMediaInfo:
+        def __init__(self, season=None, episodes=None, total_episode=None, start_episode=None):
+            self.season = season
+            self.episodes = episodes or []
+            self.total_episode = total_episode
+            self.start_episode = start_episode
+
+    class _SubscribeEpisodeInfo:
+        def __init__(self):
+            self.downloading = []
+            self.downloaded = []
+            self.library = []
+
+    class _SubscrbieInfo:
+        def __init__(self):
+            self.subscribe = None
+            self.episodes = {}
+
+    class _SubscribeDownloadFileInfo:
+        def __init__(self, **kwargs):
+            self.__dict__.update(kwargs)
+
+    class _SubscribeLibraryFileInfo:
+        def __init__(self, **kwargs):
+            self.__dict__.update(kwargs)
+
+    class _MediaRecognizeConvertEventData:
+        def __init__(self, **kwargs):
+            self.mediaid = kwargs.get("mediaid")
+            self.convert_type = kwargs.get("convert_type")
+            self.media_dict = kwargs.get("media_dict")
+
+    schemas_module.Notification = _Notification
+    schemas_module.Subscribe = _SubscribeSchema
+    schemas_module.NotExistMediaInfo = _NotExistMediaInfo
+    schemas_module.SubscribeEpisodeInfo = _SubscribeEpisodeInfo
+    schemas_module.SubscrbieInfo = _SubscrbieInfo
+    schemas_module.SubscribeDownloadFileInfo = _SubscribeDownloadFileInfo
+    schemas_module.SubscribeLibraryFileInfo = _SubscribeLibraryFileInfo
+    schemas_module.MediaRecognizeConvertEventData = _MediaRecognizeConvertEventData
+
+    logger_module = ensure_module("app.log", types.ModuleType("app.log"))
+
+    class _Logger:
+        def info(self, *args, **kwargs):
+            return None
+
+        def debug(self, *args, **kwargs):
+            return None
+
+        def warning(self, *args, **kwargs):
+            return None
+
+        def warn(self, *args, **kwargs):
+            return None
+
+        def error(self, *args, **kwargs):
+            return None
+
+    logger_module.logger = _Logger()
+
+    helper_subscribe_module = ensure_module("app.helper.subscribe", types.ModuleType("app.helper.subscribe"))
+
+    class _SubscribeHelper:
+        def sub_done_async(self, *args, **kwargs):
+            return None
+
+        @staticmethod
+        def get_shares():
+            return []
+
+    helper_subscribe_module.SubscribeHelper = _SubscribeHelper
+
+    helper_torrent_module = ensure_module("app.helper.torrent", types.ModuleType("app.helper.torrent"))
+    helper_torrent_module.TorrentHelper = type("TorrentHelper", (), {})
+
+    db_model_module = ensure_module("app.db.models.subscribe", types.ModuleType("app.db.models.subscribe"))
+
+    class _SubscribeModel:
+        def __init__(self, **kwargs):
+            for key, value in kwargs.items():
+                setattr(self, key, value)
+
+        def to_dict(self):
+            return dict(self.__dict__)
+
+    db_model_module.Subscribe = _SubscribeModel
+
+    subscribe_oper_module = ensure_module("app.db.subscribe_oper", types.ModuleType("app.db.subscribe_oper"))
+
+    class _SubscribeOper:
+        def update(self, *args, **kwargs):
+            return None
+
+        def get(self, *args, **kwargs):
+            return None
+
+        def list(self, *args, **kwargs):
+            return []
+
+        def delete(self, *args, **kwargs):
+            return None
+
+        def add_history(self, *args, **kwargs):
+            return None
+
+    subscribe_oper_module.SubscribeOper = _SubscribeOper
+
+    simple_oper_modules = {
+        "app.db.downloadhistory_oper": "DownloadHistoryOper",
+        "app.db.site_oper": "SiteOper",
+        "app.db.systemconfig_oper": "SystemConfigOper",
+    }
+    for module_name_key, class_name in simple_oper_modules.items():
+        module = ensure_module(module_name_key, types.ModuleType(module_name_key))
+        if class_name == "SystemConfigOper":
+            class _SystemConfigOper:
+                def get(self, *args, **kwargs):
+                    return None
+
+                def set(self, *args, **kwargs):
+                    return None
+
+            setattr(module, class_name, _SystemConfigOper)
+        else:
+            setattr(module, class_name, type(class_name, (), {}))
+
+    chain_dependencies = {
+        "app.chain.download": "DownloadChain",
+        "app.chain.media": "MediaChain",
+        "app.chain.search": "SearchChain",
+        "app.chain.tmdb": "TmdbChain",
+        "app.chain.torrents": "TorrentsChain",
+    }
+    for module_name_key, class_name in chain_dependencies.items():
+        module = ensure_module(module_name_key, types.ModuleType(module_name_key))
+        setattr(module, class_name, type(class_name, (), {}))
+
+    subscribe_path = Path(__file__).resolve().parents[1] / "app" / "chain" / "subscribe.py"
+    spec = importlib.util.spec_from_file_location(module_name, subscribe_path)
+    module = importlib.util.module_from_spec(spec)
+    sys.modules[module_name] = module
+    assert spec and spec.loader
+    spec.loader.exec_module(module)
+    module._injected_modules = injected_modules
+    return module, module.SubscribeChain
+
+
+SUBSCRIBE_CHAIN_MODULE, SubscribeChain = _load_subscribe_chain_class()
 
 
 class SubscribeChainTest(TestCase):
-    def test_is_episode_range_covered(self):
-        cases = [
-            {
-                "title": "Cherry Season S01 2014 2160p 60fps WEB-DL H265 AAC-XXX",
-                "subtitle": "",
-                "subscribe": {"start_episode": None, "total_episode": 51},
-                "expected": True,
-            },
-            {
-                "title": "【爪爪字幕组】★7月新番[欢迎来到实力至上主义的教室 第二季/Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e S2][11][1080p][HEVC][GB][MP4][招募翻译校对]",
-                "subtitle": "",
-                "subscribe": {"start_episode": None, "total_episode": 13},
-                "expected": False,
-            },
-            {
-                "title": "[秋叶原冥途战争][Akiba Maid Sensou][2022][WEB-DL][1080][TV Series][第01话][LeagueWEB]",
-                "subtitle": "",
-                "subscribe": {"start_episode": None, "total_episode": 12},
-                "expected": False,
-            },
-            {
-                "title": "Qi Refining for 3000 Years S01E06 2022 1080p B-Blobal WEB-DL X264 AAC-AnimeS@AdWeb",
-                "subtitle": "",
-                "subscribe": {"start_episode": None, "total_episode": 16},
-                "expected": False,
-            },
-            {
-                "title": "The Heart of Genius S01 13-14 2022 1080p WEB-DL H264 AAC",
-                "subtitle": "",
-                "subscribe": {"start_episode": None, "total_episode": 34},
-                "expected": False,
-            },
-            {
-                "title": "[xyx98]传颂之物/Utawarerumono/うたわれるもの[BDrip][1920x1080][TV 01-26 Fin][hevc-yuv420p10 flac_ac3][ENG PGS]",
-                "subtitle": "",
-                "subscribe": {"start_episode": None, "total_episode": 26},
-                "expected": True,
-            },
-            {
-                "title": "I Woke Up a Vampire S02 2023 2160p NF WEB-DL DDP5.1 Atmos H 265-HHWEB",
-                "subtitle": "醒来变成吸血鬼 第二季 | 全8集 | 4K | 类型: 喜剧/家庭/奇幻 | 导演: TommyLynch | 主演: NikoCeci/ZebastinBorjeau/安娜·阿劳约/KaileenAngelicChang/KrisSiddiqi",
-                "subscribe": {"start_episode": None, "total_episode": 8},
-                "expected": True,
-            },
-            {
-                "title": "Shadows of the Void S01 2024 1080p WEB-DL H264 AAC-HHWEB",
-                "subtitle": "虚无边境 | 第01-02集 | 1080p | 类型: 动画 | 导演: 巴西 | 主演: 山新/周一菡/皇贞季/Kenz/李佳怡 [内嵌中字]",
-                "subscribe": {"start_episode": None, "total_episode": 13},
-                "expected": False,
-            },
-            {
-                "title": "Mai Xiang S01 2019 2160p WEB-DL H.265 DDP2.0-HHWEB",
-                "subtitle": "麦香 | 全36集 | 4K | 类型:剧情/爱情/家庭 | 主演:傅晶/章呈赫/王伟/沙景昌/何音",
-                "subscribe": {"start_episode": None, "total_episode": 36},
-                "expected": True,
-            },
-            {
-                "title": "Jigokuraku S01E14-E25 2023 1080p CR WEB-DL x264 AAC-Nest@ADWeb",
-                "subtitle": "地狱乐 / 地獄楽 / Hell’s Paradise [14-25Fin] [中日双语字幕]",
-                "subscribe": {"start_episode": 14, "total_episode": 25},
-                "expected": True,
-            },
-            {
-                "title": "Jigokuraku S01 2023 1080p BluRay Remux AVC FLAC 2.0-AnimeF@ADE",
-                "subtitle": "地狱乐/Hell's Paradise: Jigokuraku [01-13Fin] [中日双语字幕]",
-                "subscribe": {"start_episode": None, "total_episode": 13},
-                "expected": True,
-            },
-            {
-                "title": "Jigokuraku S02E12 2026 1080p NF WEB-DL x264 AAC-ADWeb",
-                "subtitle": "地狱乐 第二季 地獄楽 第二期 第12集 | 类型: 动画",
-                "subscribe": {"start_episode": None, "total_episode": 12},
-                "expected": False,
-            },
-            {
-                "title": "Jigokuraku S02E05-E07 2026 1080p NF WEB-DL x264 AAC-ADWeb",
-                "subtitle": "地狱乐 第二季 地獄楽 第二期 第05-07集 | 类型: 动画",
-                "subscribe": {"start_episode": None, "total_episode": 12},
-                "expected": False,
-            },
-            {
-                "title": "Bungo Stray Dogs S01 2016 1080p KKTV WEB-DL x264 AAC-ADWeb",
-                "subtitle": "文豪野犬 文豪ストレイドッグス 又名: 文豪Stray Dogs 第一季 全12集 | 类型: 剧情 / 动作 / 动画 主演: 上村祐翔 / 宫野真守 / 细谷佳正 *内嵌繁体字幕*",
-                "subscribe": {"start_episode": None, "total_episode": 12},
-                "expected": True,
-            },
-            {
-                "title": "Bungou Stray Dogs S1+S2+S3+OAD 1080p BDRip HEVC FLAC-Snow-Raws",
-                "subtitle": "文豪野犬 第1-3季",
-                "subscribe": {"start_episode": None, "total_episode": 36},
-                "expected": True,
-            },
-            {
-                "title": "Bungou Stray Dogs S1+S2+S3+OAD 1080p BDRip HEVC FLAC-Snow-Raws",
-                "subtitle": "文豪野犬 第1-3季",
-                "subscribe": {"start_episode": None, "total_episode": 60},
-                "expected": True,  # 识别不到集数全匹配
-            },
-            {
-                "title": "Fu Gui S01 2005 2160p WEB-DL H265 AAC-HHWEB",
-                "subtitle": "福贵 | 全33集 | 4K | 类型: 剧情/家庭 | 导演: 朱正/袁进 | 主演: 陈创/刘敏涛/李丁/张鹰/温玉娟",
-                "subscribe": {"start_episode": None, "total_episode": 33},
-                "expected": True,
-            },
-            {
-                "title": "The Story of Ming Lan S01 2018 2160p WEB-DL CHDWEB",
-                "subtitle": "知否知否应是绿肥红瘦 全78集 | 2160p | 国语/中字 | 60帧高码TV版 | 类型:剧情/爱情/古装 | 主演:赵丽颖/冯绍峰/朱一龙/施诗/张佳宁",
-                "subscribe": {"start_episode": None, "total_episode": 78},
-                "expected": True,
-            },
-            {
-                "title": "Love Beyond the Grave S01 2026 2160p WEB-DL H265 AAC-HHWEB",
-                "subtitle": "白日提灯 / 慕胥辞 | 第18集 | 4K | 类型: 剧情 | 导演: 秦榛 | 主演: 迪丽热巴/陈飞宇/魏哲鸣/张俪/高鹤元",
-                "subscribe": {"start_episode": None, "total_episode": 40},
-                "expected": False,
-            },
-            {
-                "title": "The Long Ballad S01 2021 2160p WEB-DL H265 AAC-HHWEB",
-                "subtitle": "长歌行 | 全49集 | 4K | 类型: 剧情/爱情/古装 | 主演: 迪丽热巴/吴磊/刘宇宁/赵露思/方逸伦",
-                "subscribe": {"start_episode": None, "total_episode": 49},
-                "expected": True,
-            },
-            {
-                "title": "The Long Ballad S01E01-E04 2021 2160p WEB-DL H265 AAC-HHWEB",
-                "subtitle": "长歌行 | 第01-04集 | 4K | 类型: 剧情/爱情/古装 | 主演: 迪丽热巴/吴磊/刘宇宁/赵露思/方逸伦",
-                "subscribe": {"start_episode": None, "total_episode": 49},
-                "expected": False,
-            },
-            {
-                "title": "Spy x Family S02 2023 1080p Baha WEB-DL x264 AAC-ADWeb",
-                "subtitle": "间谍过家家 第二季 / SPY×FAMILY Season 2 [01-12Fin] [简繁内封字幕]",
-                "subscribe": {"start_episode": None, "total_episode": 12},
-                "expected": True,
-            },
-            {
-                "title": "Spy x Family S02E03-E07 2023 1080p Baha WEB-DL x264 AAC-ADWeb",
-                "subtitle": "间谍过家家 第二季 / SPY×FAMILY Season 2 第03-07集 [简繁内封字幕]",
-                "subscribe": {"start_episode": None, "total_episode": 12},
-                "expected": False,
-            },
-            {
-                "title": "Naruto Shippuden S01-S21 Complete 1080p BluRay x264 AAC-ADWeb",
-                "subtitle": "火影忍者 疾风传 全500集 [1080p][简中字幕]",
-                "subscribe": {"start_episode": None, "total_episode": 500},
-                "expected": True,
-            },
-            {
-                "title": "Naruto Shippuden S01-S21 Complete 1080p BluRay x264 AAC-ADWeb",
-                "subtitle": "火影忍者 疾风传 第01-500集 [1080p][简中字幕]",
-                "subscribe": {"start_episode": 201, "total_episode": 500},
-                "expected": True,
+    def _build_subscribe(self, **overrides):
+        data = {
+            "id": 1,
+            "name": "Test Show",
+            "season": 1,
+            "best_version": 1,
+            "type": MediaType.TV.value,
+            "start_episode": 1,
+            "total_episode": 3,
+            "current_priority": None,
+            "episode_priority": None,
+            "lack_episode": 3,
+            "state": "R",
+            "note": [],
+            "manual_total_episode": 0,
+            "tmdbid": 1,
+            "doubanid": None,
+            "year": "2026",
+            "imdbid": None,
+            "tvdbid": None,
+            "episode_group": None,
+            "poster": None,
+            "backdrop": None,
+            "description": None,
+            "last_update": None,
+            "username": None,
+            "to_dict": lambda: {},
+        }
+        data.update(overrides)
+        return SimpleNamespace(**data)
+
+    @staticmethod
+    def _build_download(priority, selected_episodes=None, meta_episodes=None):
+        return SimpleNamespace(
+            torrent_info=SimpleNamespace(pri_order=priority),
+            selected_episodes=selected_episodes,
+            meta_info=SimpleNamespace(episode_list=meta_episodes or []),
+        )
+
+    def test_get_episode_priority_falls_back_to_current_priority(self):
+        subscribe = self._build_subscribe(current_priority=80, episode_priority=None)
+
+        self.assertEqual(
+            SubscribeChain.get_episode_priority(subscribe),
+            {"1": 80, "2": 80, "3": 80},
+        )
+
+    def test_get_pending_best_version_episodes_uses_per_episode_status(self):
+        subscribe = self._build_subscribe(
+            total_episode=5,
+            episode_priority={"1": 100, "2": 80, "4": 100},
+        )
+
+        self.assertEqual(
+            SubscribeChain._get_pending_best_version_episodes(subscribe),
+            [2, 3, 5],
+        )
+
+    def test_best_version_progress_helpers_return_remaining_priority(self):
+        subscribe = self._build_subscribe(
+            total_episode=5,
+            episode_priority={"1": 100, "2": 80, "3": 90, "4": 100, "5": 70},
+            current_priority=100,
+        )
+
+        self.assertEqual(SubscribeChain.get_best_version_lack_episode(subscribe), 3)
+        self.assertEqual(SubscribeChain.get_best_version_current_priority(subscribe), 90)
+        self.assertFalse(SubscribeChain.is_best_version_complete(subscribe))
+
+    def test_best_version_progress_helpers_mark_complete_when_all_target_episodes_done(self):
+        subscribe = self._build_subscribe(
+            total_episode=3,
+            episode_priority={"1": 100, "2": 100, "3": 100},
+            current_priority=90,
+        )
+
+        self.assertEqual(SubscribeChain.get_best_version_lack_episode(subscribe), 0)
+        self.assertEqual(SubscribeChain.get_best_version_current_priority(subscribe), 100)
+        self.assertTrue(SubscribeChain.is_best_version_complete(subscribe))
+
+    def test_is_episode_range_covered_matches_pending_episodes(self):
+        subscribe = self._build_subscribe(
+            total_episode=12,
+            episode_priority={
+                **{str(ep): 100 for ep in range(1, 5)},
+                **{str(ep): 100 for ep in range(8, 13)},
             },
+        )
+
+        self.assertTrue(
+            SubscribeChain._is_episode_range_covered(
+                meta=SimpleNamespace(episode_list=[5, 6, 7]),
+                subscribe=subscribe,
+            )
+        )
+        self.assertFalse(
+            SubscribeChain._is_episode_range_covered(
+                meta=SimpleNamespace(episode_list=[1, 2, 3, 4]),
+                subscribe=subscribe,
+            )
+        )
+        self.assertTrue(
+            SubscribeChain._is_episode_range_covered(
+                meta=SimpleNamespace(episode_list=[]),
+                subscribe=subscribe,
+            )
+        )
+
+    def test_update_subscribe_priority_uses_selected_episodes(self):
+        subscribe = self._build_subscribe(
+            total_episode=4,
+            episode_priority={"1": 100, "2": 80, "3": 70, "4": 60},
+            current_priority=80,
+            lack_episode=3,
+        )
+        download = self._build_download(
+            priority=90,
+            selected_episodes=[3],
+            meta_episodes=[2, 3, 4],
+        )
+        chain = SubscribeChain()
+        mediainfo = SimpleNamespace(title_year="Test Show (2026)")
+
+        with patch.object(SUBSCRIBE_CHAIN_MODULE, "SubscribeOper") as subscribe_oper_cls, patch.object(
+            SubscribeChain,
+            "_SubscribeChain__finish_subscribe",
+        ) as finish_mock:
+            subscribe_oper = subscribe_oper_cls.return_value
+            subscribe_oper.update.return_value = None
+
+            chain.update_subscribe_priority(
+                subscribe=subscribe,
+                meta=SimpleNamespace(),
+                mediainfo=mediainfo,
+                downloads=[download],
+            )
+
+        subscribe_oper.update.assert_called_once()
+        payload = subscribe_oper.update.call_args.args[1]
+        self.assertEqual(payload["episode_priority"], {"1": 100, "2": 80, "3": 90, "4": 60})
+        self.assertEqual(payload["current_priority"], 90)
+        self.assertEqual(payload["lack_episode"], 3)
+        self.assertEqual(subscribe.episode_priority, {"1": 100, "2": 80, "3": 90, "4": 60})
+        self.assertEqual(subscribe.current_priority, 90)
+        self.assertEqual(subscribe.lack_episode, 3)
+        finish_mock.assert_not_called()
+
+    def test_update_subscribe_priority_marks_complete_when_all_target_episodes_done(self):
+        subscribe = self._build_subscribe(
+            total_episode=3,
+            episode_priority={"1": 100, "2": 90, "3": 80},
+            current_priority=90,
+            lack_episode=2,
+        )
+        downloads = [
+            self._build_download(priority=100, selected_episodes=[2]),
+            self._build_download(priority=100, selected_episodes=[3]),
         ]
+        chain = SubscribeChain()
+        meta = SimpleNamespace()
+        mediainfo = SimpleNamespace(title_year="Test Show (2026)")
 
-        for case in cases:
-            meta = MetaInfo(
-                title=case["title"], subtitle=case["subtitle"], custom_words=["#"]
-            )
-            subscribe = SimpleNamespace(**case["subscribe"])
+        with patch.object(SUBSCRIBE_CHAIN_MODULE, "SubscribeOper") as subscribe_oper_cls, patch.object(
+            SubscribeChain,
+            "_SubscribeChain__finish_subscribe",
+        ) as finish_mock:
+            subscribe_oper = subscribe_oper_cls.return_value
+            subscribe_oper.update.return_value = None
 
-            self.assertEqual(
-                SubscribeChain._is_episode_range_covered(
-                    meta=meta,
-                    subscribe=subscribe,
-                ),
-                case["expected"],
+            chain.update_subscribe_priority(
+                subscribe=subscribe,
+                meta=meta,
+                mediainfo=mediainfo,
+                downloads=downloads,
             )
+
+        payload = subscribe_oper.update.call_args.args[1]
+        self.assertEqual(payload["episode_priority"], {"1": 100, "2": 100, "3": 100})
+        self.assertEqual(payload["current_priority"], 100)
+        self.assertEqual(payload["lack_episode"], 0)
+        finish_mock.assert_called_once_with(subscribe=subscribe, meta=meta, mediainfo=mediainfo)
+
+    def test_check_resets_current_priority_when_new_episodes_expand_target_range(self):
+        subscribe = self._build_subscribe(
+            total_episode=3,
+            episode_priority={"1": 100, "2": 100, "3": 100},
+            current_priority=100,
+            lack_episode=0,
+        )
+        chain = SubscribeChain()
+        chain.recognize_media = lambda **kwargs: SimpleNamespace(
+            seasons={1: [1, 2, 3, 4, 5]},
+            title="Test Show",
+            year="2026",
+            vote_average=9.5,
+            overview="overview",
+            imdb_id="tt1234567",
+            tvdb_id=99,
+            get_poster_image=lambda: "poster",
+            get_backdrop_image=lambda: "backdrop",
+        )
+
+        with patch.object(SUBSCRIBE_CHAIN_MODULE, "SubscribeOper") as subscribe_oper_cls:
+            subscribe_oper = subscribe_oper_cls.return_value
+            subscribe_oper.list.return_value = [subscribe]
+            subscribe_oper.update.return_value = None
+
+            chain.check()
+
+        payload = subscribe_oper.update.call_args.args[1]
+        self.assertEqual(payload["total_episode"], 5)
+        self.assertEqual(payload["lack_episode"], 2)
+        self.assertEqual(payload["current_priority"], 0)
+        self.assertEqual(payload["episode_priority"], {"1": 100, "2": 100, "3": 100, "4": 0, "5": 0})
+        self.assertEqual(subscribe.total_episode, 5)
+        self.assertEqual(subscribe.lack_episode, 2)
+        self.assertEqual(subscribe.current_priority, 0)