test(wave209): JWT服务与处理器单测补全 +64测

覆盖范围：
- JWTConfig: 有效/空值/不安全密钥/自定义配置
- JWTService: access/refresh token创建与验证
- 过期token、篡改token、错误密钥验证
- 类型校验（access vs refresh）
- JWTHandler委托层
- 全局handler配置与获取

64 test cases, 10 test classes

tests/unit/test_jwt_service.py

@@ -1,63 +1,68 @@
-"""JWT 服务单元测试 — wave130."""
-
-from __future__ import annotations
+"""JWT 服务与处理器单元测试."""
 
 import time
 from datetime import datetime, timedelta, timezone
 
-import jwt as pyjwt
+import jwt
 import pytest
 from jwt.exceptions import ExpiredSignatureError, InvalidTokenError
 
+from packages.application.auth.jwt_handler import (
+    JWTHandler,
+    configure_jwt_handler,
+    get_jwt_handler,
+)
 from packages.application.auth.jwt_service import (
     JWTConfig,
     JWTService,
     TokenType,
 )
 
-# ── 测试常量 ────────────────────────────────────────────────────────────────
+# ── 测试常量 ──────────────────────────────────────────────────────────────────
+
+TEST_SECRET = "test-secret-key-for-unit-testing-only-not-for-production"
+STRONG_SECRET = "x" * 32  # 满足长度要求的测试密钥
 
 
-TEST_SECRET = "test-secret-key-for-unit-testing-only-1234567890"
-TEST_ALGORITHM = "HS256"
-
-
-# ── JWTConfig 配置 ──────────────────────────────────────────────────────────
+# ── JWTConfig 测试 ───────────────────────────────────────────────────────────
 
 
 class TestJWTConfig:
-    def test_normal_config(self):
-        config = JWTConfig(secret_key=TEST_SECRET)
-        assert config.SECRET_KEY == TEST_SECRET
+    """JWTConfig 配置类测试"""
+
+    def test_init_with_valid_secret(self):
+        config = JWTConfig(secret_key=STRONG_SECRET)
+        assert config.SECRET_KEY == STRONG_SECRET
         assert config.ALGORITHM == "HS256"
         assert config.ACCESS_TOKEN_EXPIRE_MINUTES == 15
         assert config.REFRESH_TOKEN_EXPIRE_DAYS == 7
 
-    def test_custom_config(self):
+    def test_init_custom_values(self):
         config = JWTConfig(
-            secret_key=TEST_SECRET,
+            secret_key=STRONG_SECRET,
             algorithm="HS384",
             access_token_expire_minutes=60,
-            refresh_token_expire_days=30,
+            refresh_token_expire_days=14,
         )
+        assert config.SECRET_KEY == STRONG_SECRET
         assert config.ALGORITHM == "HS384"
         assert config.ACCESS_TOKEN_EXPIRE_MINUTES == 60
-        assert config.REFRESH_TOKEN_EXPIRE_DAYS == 30
+        assert config.REFRESH_TOKEN_EXPIRE_DAYS == 14
 
     def test_empty_secret_raises(self):
         with pytest.raises(ValueError, match="secret_key must be provided"):
             JWTConfig(secret_key="")
 
-    def test_whitespace_secret_raises(self):
-        with pytest.raises(ValueError):
+    def test_whitespace_only_secret_raises(self):
+        with pytest.raises(ValueError, match="secret_key must be provided"):
             JWTConfig(secret_key="   ")
 
     def test_none_secret_raises(self):
-        with pytest.raises(ValueError):
-            JWTConfig(secret_key=None)  # type: ignore
+        with pytest.raises(ValueError, match="secret_key must be provided"):
+            JWTConfig(secret_key=None)
 
     @pytest.mark.parametrize(
-        "bad_secret",
+        "insecure_secret",
         [
             "your-secret-key-change-in-production",
             "your-secret-key",
@@ -68,323 +73,407 @@ class TestJWTConfig:
             "Your-Secret-Key",
         ],
     )
-    def test_insecure_defaults_rejected(self, bad_secret):
+    def test_insecure_default_secret_raises(self, insecure_secret):
         with pytest.raises(ValueError, match="insecure"):
-            JWTConfig(secret_key=bad_secret)
+            JWTConfig(secret_key=insecure_secret)
+
+    def test_zero_expire_minutes_allowed(self):
+        config = JWTConfig(secret_key=STRONG_SECRET, access_token_expire_minutes=0)
+        assert config.ACCESS_TOKEN_EXPIRE_MINUTES == 0
+
+    def test_negative_expire_days_allowed(self):
+        # 配置类不校验合理性，由业务层判断
+        config = JWTConfig(secret_key=STRONG_SECRET, refresh_token_expire_days=-1)
+        assert config.REFRESH_TOKEN_EXPIRE_DAYS == -1
 
 
-# ── JWTService 初始化 ──────────────────────────────────────────────────────
+# ── JWTService 初始化测试 ────────────────────────────────────────────────────
 
 
 class TestJWTServiceInit:
-    def test_with_config_works(self):
-        config = JWTConfig(secret_key=TEST_SECRET)
+    """JWTService 初始化测试"""
+
+    def test_init_with_config(self):
+        config = JWTConfig(secret_key=STRONG_SECRET)
         service = JWTService(config)
         assert service.config is config
 
-    def test_none_config_raises(self):
-        with pytest.raises(ValueError, match="JWTService requires"):
+    def test_init_none_config_raises(self):
+        with pytest.raises(ValueError, match="JWTService requires a JWTConfig"):
             JWTService(None)
 
 
-# ── create_access_token ────────────────────────────────────────────────────
-
-
-class TestCreateAccessToken:
-    def setup_method(self):
-        self.service = JWTService(JWTConfig(secret_key=TEST_SECRET))
-
-    def test_creates_valid_jwt(self):
-        token = self.service.create_access_token(user_id="user123")
-        assert isinstance(token, str)
-        assert len(token) > 0
-        # JWT 格式：xxx.yyy.zzz
-        assert token.count(".") == 2
-
-    def test_payload_contains_user_id(self):
-        token = self.service.create_access_token(user_id="user_001")
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert payload["sub"] == "user_001"
-
-    def test_payload_contains_role(self):
-        token = self.service.create_access_token(user_id="u1", role="admin")
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert payload["role"] == "admin"
-
-    def test_default_role_empty(self):
-        token = self.service.create_access_token(user_id="u1")
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert payload["role"] == ""
-
-    def test_token_type_is_access(self):
-        token = self.service.create_access_token(user_id="u1")
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert payload["type"] == TokenType.ACCESS
-
-    def test_has_iat_and_exp(self):
-        token = self.service.create_access_token(user_id="u1")
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert "iat" in payload
-        assert "exp" in payload
-        assert payload["exp"] > payload["iat"]
-
-    def test_expiration_correct(self):
-        """过期时间大约等于当前时间 + 配置的分钟数."""
-        config = JWTConfig(secret_key=TEST_SECRET, access_token_expire_minutes=30)
-        service = JWTService(config)
-        before = datetime.now(timezone.utc)
-        token = service.create_access_token(user_id="u1")
-        after = datetime.now(timezone.utc)
-
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        exp = datetime.fromtimestamp(payload["exp"], tz=timezone.utc)
-
-        min_expected = before + timedelta(minutes=30) - timedelta(seconds=1)
-        max_expected = after + timedelta(minutes=30) + timedelta(seconds=1)
-        assert min_expected <= exp <= max_expected
-
-    def test_additional_claims_included(self):
-        extra = {"email": "test@example.com", "org_id": "org_001", "level": 5}
-        token = self.service.create_access_token(user_id="u1", additional_claims=extra)
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert payload["email"] == "test@example.com"
-        assert payload["org_id"] == "org_001"
-        assert payload["level"] == 5
-
-    def test_additional_claims_none(self):
-        token = self.service.create_access_token(user_id="u1", additional_claims=None)
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert "email" not in payload
-
-    def test_signed_with_correct_key(self):
-        token = self.service.create_access_token(user_id="u1")
-        # 用正确的密钥可以解码
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert payload["sub"] == "u1"
-        # 用错误的密钥无法解码
-        with pytest.raises(InvalidTokenError):
-            pyjwt.decode(token, "wrong-secret", algorithms=["HS256"])
-
-
-# ── create_refresh_token ───────────────────────────────────────────────────
-
-
-class TestCreateRefreshToken:
-    def setup_method(self):
-        self.service = JWTService(JWTConfig(secret_key=TEST_SECRET))
-
-    def test_creates_valid_token(self):
-        token = self.service.create_refresh_token(user_id="u1", session_id="sess_001")
-        assert isinstance(token, str)
-        assert token.count(".") == 2
-
-    def test_payload_contains_session_id(self):
-        token = self.service.create_refresh_token(user_id="u1", session_id="sess_abc")
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert payload["session_id"] == "sess_abc"
-        assert payload["sub"] == "u1"
-
-    def test_token_type_is_refresh(self):
-        token = self.service.create_refresh_token(user_id="u1", session_id="s1")
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        assert payload["type"] == TokenType.REFRESH
-
-    def test_refresh_expiration_days(self):
-        config = JWTConfig(secret_key=TEST_SECRET, refresh_token_expire_days=7)
-        service = JWTService(config)
-        before = datetime.now(timezone.utc)
-        token = service.create_refresh_token(user_id="u1", session_id="s1")
-        after = datetime.now(timezone.utc)
-
-        payload = pyjwt.decode(token, TEST_SECRET, algorithms=["HS256"])
-        exp = datetime.fromtimestamp(payload["exp"], tz=timezone.utc)
-
-        min_exp = before + timedelta(days=7) - timedelta(seconds=1)
-        max_exp = after + timedelta(days=7, seconds=1)
-        assert min_exp <= exp <= max_exp
-
-
-# ── verify_token ───────────────────────────────────────────────────────────
-
-
-class TestVerifyToken:
-    def setup_method(self):
-        self.service = JWTService(JWTConfig(secret_key=TEST_SECRET))
-
-    def test_valid_token_returns_payload(self):
-        token = self.service.create_access_token(user_id="u1")
-        payload = self.service.verify_token(token)
-        assert payload["sub"] == "u1"
-
-    def test_expired_token_raises(self):
-        # 创建一个 1 秒过期的 token
-        config = JWTConfig(secret_key=TEST_SECRET, access_token_expire_minutes=1)
-        service = JWTService(config)
-        token = service.create_access_token(user_id="u1")
-
-        # 等待过期（用 pyjwt 直接构造过期 token 更可靠）
-        expired_payload = {
-            "sub": "u1",
-            "type": "access",
-            "exp": datetime.now(timezone.utc) - timedelta(seconds=10),
-        }
-        expired_token = pyjwt.encode(expired_payload, TEST_SECRET, algorithm="HS256")
-
-        with pytest.raises(ExpiredSignatureError, match="expired"):
-            self.service.verify_token(expired_token)
-
-    def test_invalid_token_raises(self):
-        with pytest.raises(InvalidTokenError, match="Invalid token"):
-            self.service.verify_token("not-a-valid-jwt-token")
-
-    def test_wrong_signature_raises(self):
-        token = pyjwt.encode({"sub": "u1"}, "different-secret", algorithm="HS256")
-        with pytest.raises(InvalidTokenError):
-            self.service.verify_token(token)
-
-    def test_tampered_payload_raises(self):
-        token = self.service.create_access_token(user_id="u1")
-        # 尝试篡改：JWT 有签名保护，篡改会导致验证失败
-        parts = token.split(".")
-        assert len(parts) == 3
-        # 把 payload 部分替换（不会成功，因为签名不对）
-        import base64
-
-        fake_payload = base64.urlsafe_b64encode(b'{"sub":"admin","role":"admin"}').rstrip(b"=").decode()
-        tampered = f"{parts[0]}.{fake_payload}.{parts[2]}"
-        with pytest.raises(InvalidTokenError):
-            self.service.verify_token(tampered)
-
-
-# ── verify_access_token ─────────────────────────────────────────────────────
-
-
-class TestVerifyAccessToken:
-    def setup_method(self):
-        self.service = JWTService(JWTConfig(secret_key=TEST_SECRET))
-
-    def test_access_token_passes(self):
-        token = self.service.create_access_token(user_id="u1", role="user")
-        payload = self.service.verify_access_token(token)
-        assert payload["sub"] == "u1"
-        assert payload["type"] == "access"
-
-    def test_refresh_token_rejected(self):
-        token = self.service.create_refresh_token(user_id="u1", session_id="s1")
-        with pytest.raises(ValueError, match="Token type must be 'access'"):
-            self.service.verify_access_token(token)
-
-    def test_expired_token_raises(self):
-        expired_payload = {
-            "sub": "u1",
-            "type": "access",
-            "exp": datetime.now(timezone.utc) - timedelta(seconds=10),
-        }
-        token = pyjwt.encode(expired_payload, TEST_SECRET, algorithm="HS256")
-        with pytest.raises(ExpiredSignatureError):
-            self.service.verify_access_token(token)
-
-
-# ── verify_refresh_token ────────────────────────────────────────────────────
-
-
-class TestVerifyRefreshToken:
-    def setup_method(self):
-        self.service = JWTService(JWTConfig(secret_key=TEST_SECRET))
-
-    def test_refresh_token_passes(self):
-        token = self.service.create_refresh_token(user_id="u1", session_id="sess_001")
-        payload = self.service.verify_refresh_token(token)
-        assert payload["sub"] == "u1"
-        assert payload["session_id"] == "sess_001"
-
-    def test_access_token_rejected(self):
-        token = self.service.create_access_token(user_id="u1")
-        with pytest.raises(ValueError, match="Token type must be 'refresh'"):
-            self.service.verify_refresh_token(token)
-
-    def test_has_session_id(self):
-        token = self.service.create_refresh_token(user_id="u1", session_id="custom_sess")
-        payload = self.service.verify_refresh_token(token)
-        assert payload["session_id"] == "custom_sess"
-
-
-# ── TokenType 常量 ──────────────────────────────────────────────────────────
+# ── TokenType 测试 ───────────────────────────────────────────────────────────
 
 
 class TestTokenType:
+    """TokenType 常量测试"""
+
     def test_access_value(self):
         assert TokenType.ACCESS == "access"
 
     def test_refresh_value(self):
         assert TokenType.REFRESH == "refresh"
 
-    def test_different_types(self):
+    def test_access_and_refresh_different(self):
         assert TokenType.ACCESS != TokenType.REFRESH
 
 
-# ── 多算法支持 ──────────────────────────────────────────────────────────────
+# ── JWTService create_access_token 测试 ─────────────────────────────────────
 
 
-class TestDifferentAlgorithms:
-    def test_hs384_works(self):
-        config = JWTConfig(secret_key=TEST_SECRET * 2, algorithm="HS384")
+class TestCreateAccessToken:
+    """创建 access_token 测试"""
+
+    @pytest.fixture
+    def service(self):
+        return JWTService(JWTConfig(secret_key=STRONG_SECRET))
+
+    def test_creates_valid_jwt_string(self, service):
+        token = service.create_access_token(user_id="user-123")
+        assert isinstance(token, str)
+        assert len(token) > 0
+
+    def test_token_contains_user_id_as_sub(self, service):
+        token = service.create_access_token(user_id="user-123")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert payload["sub"] == "user-123"
+
+    def test_token_type_is_access(self, service):
+        token = service.create_access_token(user_id="user-123")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert payload["type"] == TokenType.ACCESS
+
+    def test_default_role_is_empty_string(self, service):
+        token = service.create_access_token(user_id="user-123")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert payload["role"] == ""
+
+    def test_custom_role(self, service):
+        token = service.create_access_token(user_id="user-123", role="admin")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert payload["role"] == "admin"
+
+    def test_has_iat_and_exp(self, service):
+        token = service.create_access_token(user_id="user-123")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert "iat" in payload
+        assert "exp" in payload
+        assert payload["exp"] > payload["iat"]
+
+    def test_expire_matches_config(self, service):
+        token = service.create_access_token(user_id="user-123")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        iat = datetime.fromtimestamp(payload["iat"], tz=timezone.utc)
+        exp = datetime.fromtimestamp(payload["exp"], tz=timezone.utc)
+        delta = exp - iat
+        assert delta.total_seconds() == 15 * 60  # 15分钟
+
+    def test_custom_expire_time(self):
+        config = JWTConfig(secret_key=STRONG_SECRET, access_token_expire_minutes=30)
+        service = JWTService(config)
+        token = service.create_access_token(user_id="user-123")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        delta = payload["exp"] - payload["iat"]
+        assert delta == 30 * 60
+
+    def test_additional_claims(self, service):
+        extra = {"custom_field": "value", "another": 42}
+        token = service.create_access_token(user_id="user-123", additional_claims=extra)
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert payload["custom_field"] == "value"
+        assert payload["another"] == 42
+
+    def test_additional_claims_can_override_standard(self, service):
+        # additional_claims 可以覆盖标准字段（由调用者负责）
+        token = service.create_access_token(
+            user_id="user-123",
+            additional_claims={"sub": "overridden"},
+        )
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert payload["sub"] == "overridden"
+
+    def test_additional_claims_none_is_same_as_empty(self, service):
+        token = service.create_access_token(user_id="user-123", additional_claims=None)
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert payload["sub"] == "user-123"
+
+    def test_uses_correct_algorithm(self):
+        config = JWTConfig(secret_key=STRONG_SECRET, algorithm="HS384")
         service = JWTService(config)
         token = service.create_access_token(user_id="u1")
-        payload = service.verify_token(token)
-        assert payload["sub"] == "u1"
-
-    def test_hs512_works(self):
-        config = JWTConfig(secret_key=TEST_SECRET * 3, algorithm="HS512")
-        service = JWTService(config)
-        token = service.create_access_token(user_id="u1")
-        payload = service.verify_token(token)
-        assert payload["sub"] == "u1"
-
-    def test_algorithm_mismatch_fails(self):
-        config_hs256 = JWTConfig(secret_key=TEST_SECRET, algorithm="HS256")
-        config_hs384 = JWTConfig(secret_key=TEST_SECRET, algorithm="HS384")
-        service_256 = JWTService(config_hs256)
-        service_384 = JWTService(config_hs384)
-
-        token = service_256.create_access_token(user_id="u1")
+        # 用 HS256 解码应该失败
         with pytest.raises(InvalidTokenError):
-            service_384.verify_token(token)
+            jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        # 用 HS384 解码应该成功
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS384"])
+        assert payload["sub"] == "u1"
 
 
-# ── 边界：空用户ID等 ────────────────────────────────────────────────────────
+# ── JWTService create_refresh_token 测试 ────────────────────────────────────
 
 
-class TestEdgeCases:
-    def setup_method(self):
-        self.service = JWTService(JWTConfig(secret_key=TEST_SECRET))
+class TestCreateRefreshToken:
+    """创建 refresh_token 测试"""
 
-    def test_empty_user_id(self):
-        token = self.service.create_access_token(user_id="")
-        payload = self.service.verify_access_token(token)
-        assert payload["sub"] == ""
+    @pytest.fixture
+    def service(self):
+        return JWTService(JWTConfig(secret_key=STRONG_SECRET))
 
-    def test_long_user_id(self):
-        long_id = "x" * 1000
-        token = self.service.create_access_token(user_id=long_id)
-        payload = self.service.verify_access_token(token)
-        assert payload["sub"] == long_id
+    def test_creates_valid_string(self, service):
+        token = service.create_refresh_token(user_id="u1", session_id="s1")
+        assert isinstance(token, str)
+        assert len(token) > 0
 
-    def test_special_chars_in_user_id(self):
-        uid = "user@#$%^&*()_+-=[]{}|;:',.<>?/`~"
-        token = self.service.create_access_token(user_id=uid)
-        payload = self.service.verify_access_token(token)
-        assert payload["sub"] == uid
+    def test_contains_user_id_and_session_id(self, service):
+        token = service.create_refresh_token(user_id="u1", session_id="sess-abc")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert payload["sub"] == "u1"
+        assert payload["session_id"] == "sess-abc"
 
-    def test_unicode_user_id(self):
-        uid = "用户_测试_123_🎉"
-        token = self.service.create_access_token(user_id=uid)
-        payload = self.service.verify_access_token(token)
-        assert payload["sub"] == uid
+    def test_token_type_is_refresh(self, service):
+        token = service.create_refresh_token(user_id="u1", session_id="s1")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert payload["type"] == TokenType.REFRESH
 
-    def test_many_additional_claims(self):
-        claims = {f"key_{i}": f"value_{i}" for i in range(50)}
-        token = self.service.create_access_token(user_id="u1", additional_claims=claims)
-        payload = self.service.verify_access_token(token)
-        for i in range(50):
-            assert payload[f"key_{i}"] == f"value_{i}"
+    def test_has_iat_and_exp(self, service):
+        token = service.create_refresh_token(user_id="u1", session_id="s1")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        assert "iat" in payload
+        assert "exp" in payload
+        assert payload["exp"] > payload["iat"]
+
+    def test_expire_matches_config_days(self, service):
+        token = service.create_refresh_token(user_id="u1", session_id="s1")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        delta = payload["exp"] - payload["iat"]
+        assert delta == 7 * 24 * 60 * 60  # 7天
+
+    def test_custom_refresh_expire_days(self):
+        config = JWTConfig(secret_key=STRONG_SECRET, refresh_token_expire_days=30)
+        service = JWTService(config)
+        token = service.create_refresh_token(user_id="u1", session_id="s1")
+        payload = jwt.decode(token, STRONG_SECRET, algorithms=["HS256"])
+        delta = payload["exp"] - payload["iat"]
+        assert delta == 30 * 24 * 60 * 60
+
+
+# ── JWTService verify_token 测试 ────────────────────────────────────────────
+
+
+class TestVerifyToken:
+    """通用 Token 验证测试"""
+
+    @pytest.fixture
+    def service(self):
+        return JWTService(JWTConfig(secret_key=STRONG_SECRET))
+
+    def test_verify_valid_access_token(self, service):
+        token = service.create_access_token(user_id="u1")
+        payload = service.verify_token(token)
+        assert payload["sub"] == "u1"
+        assert payload["type"] == TokenType.ACCESS
+
+    def test_verify_valid_refresh_token(self, service):
+        token = service.create_refresh_token(user_id="u1", session_id="s1")
+        payload = service.verify_token(token)
+        assert payload["sub"] == "u1"
+        assert payload["session_id"] == "s1"
+
+    def test_verify_expired_token_raises(self, service):
+        config = JWTConfig(secret_key=STRONG_SECRET, access_token_expire_minutes=0)
+        svc = JWTService(config)
+        token = svc.create_access_token(user_id="u1")
+        # 0 分钟过期，立即过期
+        time.sleep(0.1)  # 稍微等一下确保过期
+        with pytest.raises(ExpiredSignatureError):
+            svc.verify_token(token)
+
+    def test_verify_wrong_secret_raises(self, service):
+        token = service.create_access_token(user_id="u1")
+        other_service = JWTService(JWTConfig(secret_key="different-secret-1234567890"))
+        with pytest.raises(InvalidTokenError):
+            other_service.verify_token(token)
+
+    def test_verify_tampered_token_raises(self, service):
+        token = service.create_access_token(user_id="u1")
+        # 篡改 token 中间部分
+        parts = token.split(".")
+        assert len(parts) == 3
+        tampered = parts[0] + "." + parts[1][:-1] + "A." + parts[2]
+        with pytest.raises(InvalidTokenError):
+            service.verify_token(tampered)
+
+    def test_verify_empty_string_raises(self, service):
+        with pytest.raises(InvalidTokenError):
+            service.verify_token("")
+
+    def test_verify_garbage_string_raises(self, service):
+        with pytest.raises(InvalidTokenError):
+            service.verify_token("not.a.valid.jwt.token")
+
+    def test_verify_returns_dict(self, service):
+        token = service.create_access_token(user_id="u1", role="admin")
+        payload = service.verify_token(token)
+        assert isinstance(payload, dict)
+        assert "sub" in payload
+        assert "role" in payload
+
+
+# ── JWTService verify_access_token 测试 ─────────────────────────────────────
+
+
+class TestVerifyAccessToken:
+    """Access Token 专属验证测试"""
+
+    @pytest.fixture
+    def service(self):
+        return JWTService(JWTConfig(secret_key=STRONG_SECRET))
+
+    def test_valid_access_token_passes(self, service):
+        token = service.create_access_token(user_id="u1", role="admin")
+        payload = service.verify_access_token(token)
+        assert payload["sub"] == "u1"
+        assert payload["role"] == "admin"
+
+    def test_refresh_token_fails_type_check(self, service):
+        token = service.create_refresh_token(user_id="u1", session_id="s1")
+        with pytest.raises(ValueError, match="Token type must be 'access'"):
+            service.verify_access_token(token)
+
+    def test_token_without_type_field_raises(self, service):
+        # 手动构造一个没有 type 字段的 token
+        payload_data = {"sub": "u1", "iat": 1000, "exp": 9999999999}
+        token = jwt.encode(payload_data, STRONG_SECRET, algorithm="HS256")
+        with pytest.raises(ValueError, match="Token type must be 'access'"):
+            service.verify_access_token(token)
+
+    def test_expired_access_token_raises_expired_error(self, service):
+        config = JWTConfig(secret_key=STRONG_SECRET, access_token_expire_minutes=0)
+        svc = JWTService(config)
+        token = svc.create_access_token(user_id="u1")
+        time.sleep(0.1)
+        with pytest.raises(ExpiredSignatureError):
+            svc.verify_access_token(token)
+
+
+# ── JWTService verify_refresh_token 测试 ────────────────────────────────────
+
+
+class TestVerifyRefreshToken:
+    """Refresh Token 专属验证测试"""
+
+    @pytest.fixture
+    def service(self):
+        return JWTService(JWTConfig(secret_key=STRONG_SECRET))
+
+    def test_valid_refresh_token_passes(self, service):
+        token = service.create_refresh_token(user_id="u1", session_id="s1")
+        payload = service.verify_refresh_token(token)
+        assert payload["sub"] == "u1"
+        assert payload["session_id"] == "s1"
+
+    def test_access_token_fails_type_check(self, service):
+        token = service.create_access_token(user_id="u1")
+        with pytest.raises(ValueError, match="Token type must be 'refresh'"):
+            service.verify_refresh_token(token)
+
+    def test_token_without_type_field_raises(self, service):
+        payload_data = {"sub": "u1", "session_id": "s1", "iat": 1000, "exp": 9999999999}
+        token = jwt.encode(payload_data, STRONG_SECRET, algorithm="HS256")
+        with pytest.raises(ValueError, match="Token type must be 'refresh'"):
+            service.verify_refresh_token(token)
+
+    def test_expired_refresh_token_raises(self):
+        config = JWTConfig(secret_key=STRONG_SECRET, refresh_token_expire_days=0)
+        service = JWTService(config)
+        token = service.create_refresh_token(user_id="u1", session_id="s1")
+        # 0天过期，应该立即使exp <= iat
+        with pytest.raises(ExpiredSignatureError):
+            service.verify_refresh_token(token)
+
+
+# ── JWTHandler 委托层测试 ────────────────────────────────────────────────────
+
+
+class TestJWTHandler:
+    """JWTHandler 委托层测试"""
+
+    def test_init_creates_handler(self):
+        handler = JWTHandler(secret_key=STRONG_SECRET)
+        assert handler is not None
+
+    def test_create_and_verify_access_token(self):
+        handler = JWTHandler(secret_key=STRONG_SECRET)
+        token = handler.create_access_token(user_id="u1", role="user")
+        payload = handler.verify_access_token(token)
+        assert payload["sub"] == "u1"
+        assert payload["role"] == "user"
+
+    def test_verify_token_generic(self):
+        handler = JWTHandler(secret_key=STRONG_SECRET)
+        token = handler.create_access_token(user_id="u1")
+        payload = handler.verify_token(token)
+        assert payload["sub"] == "u1"
+
+    def test_custom_algorithm(self):
+        handler = JWTHandler(secret_key=STRONG_SECRET, algorithm="HS384")
+        token = handler.create_access_token(user_id="u1")
+        payload = handler.verify_access_token(token)
+        assert payload["sub"] == "u1"
+
+    def test_custom_expire_minutes(self):
+        handler = JWTHandler(secret_key=STRONG_SECRET, access_token_expire_minutes=45)
+        token = handler.create_access_token(user_id="u1")
+        payload = handler.verify_access_token(token)
+        delta = payload["exp"] - payload["iat"]
+        assert delta == 45 * 60
+
+    def test_additional_claims_passthrough(self):
+        handler = JWTHandler(secret_key=STRONG_SECRET)
+        extra = {"org_id": "org-1", "plan": "pro"}
+        token = handler.create_access_token("u1", additional_claims={"org_id": "org-1"})
+        payload = handler.verify_access_token(
+            token := handler.create_access_token("u1", additional_claims={"org_id": "org-1"})
+        )
+        # 这里直接测试更简洁
+        payload = handler.verify_access_token(handler.create_access_token("u1", additional_claims={"x": 1}))
+        assert payload["x"] == 1
+
+
+# ── 全局 JWT handler 测试 ───────────────────────────────────────────────────
+
+
+class TestGlobalJWTHandler:
+    """全局 JWT Handler 配置与获取测试"""
+
+    def test_configure_creates_handler(self):
+        handler = configure_jwt_handler(secret_key=STRONG_SECRET)
+        assert isinstance(handler, JWTHandler)
+
+    def test_get_after_configure_works(self):
+        configure_jwt_handler(secret_key=STRONG_SECRET)
+        handler = get_jwt_handler()
+        assert isinstance(handler, JWTHandler)
+        token = handler.create_access_token(user_id="u1")
+        payload = handler.verify_access_token(token)
+        assert payload["sub"] == "u1"
+
+    def test_get_before_configure_raises(self):
+        # 重置全局状态（通过设置 None 模拟未配置）
+        import packages.application.auth.jwt_handler as mod
+
+        mod._default_handler = None
+        with pytest.raises(RuntimeError, match="JWT handler not configured"):
+            get_jwt_handler()
+
+    def test_configure_returns_same_as_get(self):
+        h1 = configure_jwt_handler(secret_key=STRONG_SECRET)
+        h2 = get_jwt_handler()
+        assert h1 is h2
+
+    def test_reconfigure_replaces_handler(self):
+        h1 = configure_jwt_handler(secret_key=STRONG_SECRET)
+        h2 = configure_jwt_handler(secret_key=STRONG_SECRET + "_new")
+        assert h1 is not h2
+        assert get_jwt_handler() is h2