DEV-MERGE-LEGACY-BACKEND-2026/internal/identity/handler/handler_test.go

// Handler 单测（T4-4 验收）：/auth/* 端点端到端（mock 仓储 + 真 Issuer + miniredis，不连真实 DB/Redis）。
//
// 覆盖：
//   - 入参校验（validator）→ code 2001 / 2002
//   - 两步登录①② → code 200（含 loginTicket / accessToken）
//   - 防枚举统一文案 → code 1001（未知账号 / 密码错 / 禁用）
//   - 票据失效 / 重放 / 作用域越权 → code 1001 / 1003
//   - Me（受保护，读中间件写入的 claims）/ Logout（恒 200 幂等）/ Refresh
//   - 微信占位 → code 5001（暂未开放）
//
// 断言纪律（响应契约 = code-based，HTTP 恒 200）：只断 body.code（铁律 6），
// 不依赖 HTTP 状态码（恒 200）。
package handler

import (
	"context"
	"crypto/md5"
	"crypto/rand"
	"crypto/rsa"
	"crypto/x509"
	"encoding/hex"
	"encoding/json"
	"encoding/pem"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"

	miniredis "github.com/alicebob/miniredis/v2"
	"github.com/gofiber/fiber/v2"

	"yuansiwei/unified-backend/internal/identity/credential"
	"yuansiwei/unified-backend/internal/identity/model"
	"yuansiwei/unified-backend/internal/identity/repository"
	"yuansiwei/unified-backend/internal/identity/service"
	"yuansiwei/unified-backend/internal/identity/token"
	"yuansiwei/unified-backend/internal/infra/config"
	apperrors "yuansiwei/unified-backend/internal/infra/errors"
	appredis "yuansiwei/unified-backend/internal/infra/redis"
	orgmodel "yuansiwei/unified-backend/internal/org/model"
)

// ---- 仓储 mock（实现 repository 接口，纯内存；与 service 单测同源逻辑）----

type mockUsers struct{ byUID map[string]*model.User }

func (m *mockUsers) GetByCanonicalUserID(_ context.Context, uid string) (*model.User, error) {
	u, ok := m.byUID[uid]
	if !ok {
		return nil, apperrors.ErrNotFound
	}
	return u, nil
}
func (m *mockUsers) UpdatePasswordLazyUpgrade(_ context.Context, uid, newHash string) error {
	u, ok := m.byUID[uid]
	if !ok {
		return apperrors.ErrNotFound
	}
	u.PasswordHash = &newHash
	u.PasswordSalt = nil
	hv := model.HashVersionArgon2
	u.HashVersion = &hv
	return nil
}

type mockIdentities struct{ byTypeIdentAppID map[string]map[string]map[string]*model.Identity }

func newMockIdentities() *mockIdentities {
	return &mockIdentities{byTypeIdentAppID: map[string]map[string]map[string]*model.Identity{}}
}
func (m *mockIdentities) add(typ, identifier, appid string, it *model.Identity) {
	if m.byTypeIdentAppID[typ] == nil {
		m.byTypeIdentAppID[typ] = map[string]map[string]*model.Identity{}
	}
	if m.byTypeIdentAppID[typ][identifier] == nil {
		m.byTypeIdentAppID[typ][identifier] = map[string]*model.Identity{}
	}
	m.byTypeIdentAppID[typ][identifier][appid] = it
}
func (m *mockIdentities) GetByTypeIdentifierAppID(_ context.Context, typ, identifier, appid string) (*model.Identity, error) {
	it, ok := m.byTypeIdentAppID[typ][identifier][appid]
	if !ok {
		return nil, apperrors.ErrNotFound
	}
	return it, nil
}

type mockMemberships struct{ byUser map[string][]orgmodel.Membership }

func (m *mockMemberships) add(uid string, ms ...orgmodel.Membership) {
	m.byUser[uid] = append(m.byUser[uid], ms...)
}
func (m *mockMemberships) ListByCanonicalUserID(_ context.Context, uid string) ([]orgmodel.Membership, error) {
	list := m.byUser[uid]
	if list == nil {
		return []orgmodel.Membership{}, nil
	}
	return list, nil
}
func (m *mockMemberships) GetByUserInstitutionCampus(_ context.Context, uid string, inst, campus int64) (*orgmodel.Membership, error) {
	var best *orgmodel.Membership
	for i := range m.byUser[uid] {
		mm := &m.byUser[uid][i]
		if mm.InstitutionID == inst && mm.CampusID == campus {
			if best == nil || mm.CreatedAt.After(best.CreatedAt) {
				best = mm
			}
		}
	}
	if best == nil {
		return nil, apperrors.ErrNotFound
	}
	return best, nil
}

// 编译期断言：mock 满足 repository 接口（签名漂移即编译失败）。
var (
	_ repository.UserRepository       = (*mockUsers)(nil)
	_ repository.IdentityRepository   = (*mockIdentities)(nil)
	_ repository.MembershipRepository = (*mockMemberships)(nil)
)

// ---- fixture ----

// fakeWechat 微信客户端打桩：code→openid 映射（默认返回 "openid-fixed"；可注入失败）。
type fakeWechat struct {
	byCode map[string]string
	fail   bool
	called int
}

func (f *fakeWechat) ExchangeCode(_ context.Context, _, _, code, _ string) (string, error) {
	f.called++
	if f.fail {
		return "", &wechatErr{}
	}
	if oid, ok := f.byCode[code]; ok {
		return oid, nil
	}
	return "", &wechatErr{}
}

// wechatErr 实现 wechat 包的"换 openid 失败"错误形态（IsTokenError 兼容：此处仅需非 nil error）。
type wechatErr struct{}

func (*wechatErr) Error() string { return "wechat: 换 openid 失败（测试打桩）" }

type fixture struct {
	t           *testing.T
	users       *mockUsers
	identities  *mockIdentities
	memberships *mockMemberships
	wechat      *fakeWechat
	wxSvc       *service.WechatService
	handler     *Handler
	pubKeys     []string
	privPEM     string
	issuer      *token.Issuer
	revoke      *appredis.RevocationStore
	refresh     *appredis.RefreshStore
}

// newFixture 起 miniredis + 共享 *Client + 真 Issuer(30min/30d) + AuthService + Handler。
func newFixture(t *testing.T) *fixture {
	t.Helper()
	mr, err := miniredis.Run()
	if err != nil {
		t.Fatalf("miniredis.Run: %v", err)
	}
	t.Cleanup(mr.Close)

	rc, err := appredis.NewClient(config.RedisCfg{Addr: mr.Addr()})
	if err != nil {
		t.Fatalf("NewClient: %v", err)
	}
	t.Cleanup(func() { _ = rc.Close() })

	privPEM, pubKeys := genRSAKey(t)
	refreshStore := appredis.NewRefreshStore(rc)
	revocation := appredis.NewRevocationStore(rc, "revoked")
	tickets := appredis.NewLoginTicketStore(rc)
	wxStates := appredis.NewWechatQrcodeStore(rc)

	issuer, err := token.NewIssuer(privPEM, "https://unified.test", 30*time.Minute, 30*24*time.Hour, refreshStore, revocation)
	if err != nil {
		t.Fatalf("NewIssuer: %v", err)
	}
	users := &mockUsers{byUID: map[string]*model.User{}}
	ids := newMockIdentities()
	mergs := &mockMemberships{byUser: map[string][]orgmodel.Membership{}}
	svc, err := service.NewAuthService(service.Config{
		Users: users, Identities: ids, Memberships: mergs,
		Issuer: issuer, Tickets: tickets,
		AccessTTL: 30 * time.Minute, PublicKeys: pubKeys, IssuerStr: "https://unified.test",
		Revocation: revocation, LoginTicketTTL: 5 * time.Minute,
	})
	if err != nil {
		t.Fatalf("NewAuthService: %v", err)
	}
	fw := &fakeWechat{byCode: map[string]string{}}
	wxSvc, err := service.NewWechatService(service.WechatConfig{
		Client: fw, States: wxStates, Tickets: tickets, Identities: ids, Memberships: mergs,
		Campuses:    []service.WechatCampus{{CampusID: 3, AppID: "appid-test", Secret: "secret-test"}},
		CallbackURL: "https://unified.test/auth/wechat/callback",
	})
	if err != nil {
		t.Fatalf("NewWechatService: %v", err)
	}
	h, err := New(Config{Svc: svc, Wechat: wxSvc})
	if err != nil {
		t.Fatalf("New Handler: %v", err)
	}
	return &fixture{
		t: t, users: users, identities: ids, memberships: mergs, wechat: fw, wxSvc: wxSvc, handler: h,
		pubKeys: pubKeys, privPEM: privPEM, issuer: issuer, revoke: revocation, refresh: refreshStore,
	}
}

// genRSAKey 生成 RS2048 私钥 + 公钥 PEM（PKCS1 私有 / PKIX 公共）。
func genRSAKey(t *testing.T) (string, []string) {
	t.Helper()
	key, err := rsa.GenerateKey(rand.Reader, 2048)
	if err != nil {
		t.Fatalf("生成 RSA 私钥: %v", err)
	}
	privPEM := string(pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)}))
	pubDER, err := x509.MarshalPKIXPublicKey(&key.PublicKey)
	if err != nil {
		t.Fatalf("序列化公钥: %v", err)
	}
	pubPEM := string(pem.EncodeToMemory(&pem.Block{Type: "PUBLIC KEY", Bytes: pubDER}))
	return privPEM, []string{pubPEM}
}

// addWechatUser 造一个用户 + wechat 身份（type=wechat, identifier=openid, appid=appid-test；扫码登录绑定用）。
// v1.2：wechat 类型 appid 进唯一键，须与 WechatCampus 配置一致（"appid-test"）。
func (fx *fixture) addWechatUser(uid, openid string) {
	fx.t.Helper()
	if fx.users.byUID[uid] == nil {
		fx.users.byUID[uid] = &model.User{CanonicalUserID: uid, PersonType: model.PersonTypeStaff, Status: model.UserStatusActive}
	}
	fx.identities.add(model.IdentityTypeWechat, openid, "appid-test",
		&model.Identity{CanonicalUserID: uid, Type: model.IdentityTypeWechat, Identifier: openid, AppID: "appid-test", Verified: true})
}

// addUser 造一个 argon2 用户 + username 身份（测试夹具快捷构造）。
func (fx *fixture) addArgon2User(uid, username, password string) {
	fx.t.Helper()
	hash, err := credential.HashArgon2(password)
	if err != nil {
		fx.t.Fatalf("HashArgon2: %v", err)
	}
	fx.users.byUID[uid] = &model.User{
		CanonicalUserID: uid, PersonType: model.PersonTypeStaff, Status: model.UserStatusActive,
		PasswordHash: &hash, HashVersion: ptr(model.HashVersionArgon2),
	}
	fx.identities.add(model.IdentityTypeUsername, username, "",
		&model.Identity{CanonicalUserID: uid, Type: model.IdentityTypeUsername, Identifier: username})
}

func ptr[T any](v T) *T { return &v }

// ---- 响应解析 ----

// envelope 统一响应信封（断言用；Data 留原始 JSON 供按需再解析）。
type envelope struct {
	Code    int             `json:"code"`
	Message string          `json:"message"`
	Data    json.RawMessage `json:"data"`
	Success bool            `json:"success"`
}

// do 发一个请求并解出统一信封（HTTP 恒 200，断 body.code）。
func do(t *testing.T, app *fiber.App, method, path, body string, headers map[string]string) *envelope {
	t.Helper()
	var req *http.Request
	if method == http.MethodGet {
		req = httptest.NewRequest(method, path, nil)
	} else {
		req = httptest.NewRequest(method, path, strings.NewReader(body))
	}
	for k, v := range headers {
		req.Header.Set(k, v)
	}
	resp, err := app.Test(req, -1)
	if err != nil {
		t.Fatalf("%s %s 请求失败: %v", method, path, err)
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("%s %s HTTP 状态码=%d（铁律 6 要求恒 200）", method, path, resp.StatusCode)
	}
	var env envelope
	if err := json.NewDecoder(resp.Body).Decode(&env); err != nil {
		t.Fatalf("%s %s 解析响应失败: %v", method, path, err)
	}
	return &env
}

// newApp 按端点清单构建 fiber 应用（公开路由 + 受保护路由；受保护路由前挂 claims 中间件）。
// withClaims 为 true 时向 /auth/me、/auth/logout 注入已验签 claims（模拟 T4-5 中间件写入）。
func (fx *fixture) newApp(claims *token.Claims) *fiber.App {
	fx.t.Helper()
	app := fiber.New(fiber.Config{DisableStartupMessage: true})

	// 公开路由
	app.Post("/auth/login", fx.handler.Login)
	app.Post("/auth/issue", fx.handler.Issue)
	app.Post("/auth/refresh", fx.handler.Refresh)
	app.Get("/auth/wechat/qrcode", fx.handler.WechatQrcode)
	app.Get("/auth/wechat/authorize", fx.handler.WechatAuthorize)
	app.Get("/auth/wechat/status", fx.handler.WechatStatus)
	app.Get("/auth/wechat/callback", fx.handler.WechatCallback)

	// 受保护路由（模拟 T4-5 中间件：把 claims 写入 c.Locals(ClaimsCtxKey)）
	auth := app.Group("/auth")
	auth.Use(func(c *fiber.Ctx) error {
		if claims != nil {
			_ = c.Locals(ClaimsCtxKey, claims)
		}
		return c.Next()
	})
	auth.Get("/me", fx.handler.Me)
	auth.Post("/logout", fx.handler.Logout)
	return app
}

// login 调 ① 并返回 loginTicket（供 ② 用）。失败即 Fatal。
func (fx *fixture) login(username, password string) string {
	fx.t.Helper()
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/login",
		`{"username":"`+username+`","password":"`+password+`"}`, nil)
	if env.Code != 200 {
		fx.t.Fatalf("login code=%d msg=%s（期望 200）", env.Code, env.Message)
	}
	var step1 struct {
		LoginTicket string `json:"loginTicket"`
	}
	if err := json.Unmarshal(env.Data, &step1); err != nil {
		fx.t.Fatalf("解析 loginTicket 失败: %v", err)
	}
	if step1.LoginTicket == "" {
		fx.t.Fatal("loginTicket 为空")
	}
	return step1.LoginTicket
}

// ---- Login（两步第一步）----

// TestLogin_Success argon2 命中：code 200，data 含 loginTicket + user + memberships。
func TestLogin_Success(t *testing.T) {
	fx := newFixture(t)
	fx.addArgon2User("01GAQF0Z6C1V9Y3E5H7K2M8B4T", "testuser", "correct-password")
	fx.memberships.add("01GAQF0Z6C1V9Y3E5H7K2M8B4T", orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: "01GAQF0Z6C1V9Y3E5H7K2M8B4T",
		InstitutionID: 11, CampusID: 3, Role: "teacher", Status: "active",
	})

	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/login",
		`{"username":"testuser","password":"correct-password"}`, nil)

	if env.Code != 200 || !env.Success {
		t.Fatalf("code=%d msg=%s（期望 200 成功）", env.Code, env.Message)
	}
	var step1 struct {
		LoginTicket string `json:"loginTicket"`
		User        struct {
			ID         string `json:"id"`
			PersonType string `json:"personType"`
			Status     string `json:"status"`
		} `json:"user"`
		Memberships []struct {
			InstitutionID int64  `json:"institutionId"`
			CampusID      int64  `json:"campusId"`
			Role          string `json:"role"`
		} `json:"memberships"`
	}
	if err := json.Unmarshal(env.Data, &step1); err != nil {
		t.Fatalf("解析 data 失败: %v", err)
	}
	if step1.LoginTicket == "" {
		t.Fatal("loginTicket 缺失")
	}
	if len(step1.LoginTicket) != 32 {
		t.Fatalf("loginTicket 长度=%d（期望 32 hex）", len(step1.LoginTicket))
	}
	if step1.User.ID != "01GAQF0Z6C1V9Y3E5H7K2M8B4T" {
		t.Fatalf("user.id=%q（期望 ULID）", step1.User.ID)
	}
	if len(step1.Memberships) != 1 || step1.Memberships[0].Role != "teacher" {
		t.Fatalf("memberships=%+v（期望 1 条 teacher）", step1.Memberships)
	}
}

// TestLogin_WrongPassword 密码错：code 1001（统一文案，防枚举）。
func TestLogin_WrongPassword(t *testing.T) {
	fx := newFixture(t)
	fx.addArgon2User("01GAQF0Z6C1V9Y3E5H7K2M8B4T", "testuser", "correct-password")

	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/login",
		`{"username":"testuser","password":"wrong-password"}`, nil)
	if env.Code != apperrors.CodeUnauth {
		t.Fatalf("code=%d msg=%s（期望 %d 统一文案）", env.Code, env.Message, apperrors.CodeUnauth)
	}
	if env.Success {
		t.Fatal("success 应为 false")
	}
}

// TestLogin_UnknownUsername 未知账号：code 1001（与密码错同码，防枚举）。
func TestLogin_UnknownUsername(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/login",
		`{"username":"ghost","password":"whatever"}`, nil)
	if env.Code != apperrors.CodeUnauth {
		t.Fatalf("code=%d（期望 %d 统一文案，防枚举）", env.Code, apperrors.CodeUnauth)
	}
}

// TestLogin_DisabledUser 禁用账号：code 1001（统一文案，不泄漏"存在但禁用"）。
func TestLogin_DisabledUser(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addArgon2User(uid, "testuser", "correct-password")
	fx.users.byUID[uid].Status = model.UserStatusDisabled

	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/login",
		`{"username":"testuser","password":"correct-password"}`, nil)
	if env.Code != apperrors.CodeUnauth {
		t.Fatalf("code=%d（期望 %d 统一文案）", env.Code, apperrors.CodeUnauth)
	}
}

// TestLogin_Md5Salt_LazyUpgrade 命中 md5_salt：升级 argon2 后成功（code 200）。
func TestLogin_Md5Salt_LazyUpgrade(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	salt := "salty"
	// md5(password+salt) hex 小写（教务旧算法）
	d := md5Hex("correct-password" + salt)
	fx.users.byUID[uid] = &model.User{
		CanonicalUserID: uid, PersonType: model.PersonTypeStaff, Status: model.UserStatusActive,
		PasswordHash: &d, PasswordSalt: ptr(salt), HashVersion: ptr(model.HashVersionMd5Salt),
	}
	fx.identities.add(model.IdentityTypeUsername, "testuser", "",
		&model.Identity{CanonicalUserID: uid, Type: model.IdentityTypeUsername, Identifier: "testuser"})
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "active",
	})

	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/login",
		`{"username":"testuser","password":"correct-password"}`, nil)
	if env.Code != 200 {
		t.Fatalf("code=%d msg=%s（期望 200：惰性升级后放行）", env.Code, env.Message)
	}
	// 升级写回后 hash_version 应为 argon2
	if fx.users.byUID[uid].HashVersion == nil || *fx.users.byUID[uid].HashVersion != model.HashVersionArgon2 {
		t.Fatalf("hash_version=%v（期望升级后为 argon2）", fx.users.byUID[uid].HashVersion)
	}
}

// TestLogin_BadParam 空账号：code 2001（validator 校验失败）。
func TestLogin_BadParam(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/login", `{"username":"","password":"whatever"}`, nil)
	if env.Code != apperrors.CodeBadParam {
		t.Fatalf("code=%d（期望 %d 参数缺失）", env.Code, apperrors.CodeBadParam)
	}
}

// TestLogin_BadFormat 非法 JSON：code 2002（参数格式错误）。
func TestLogin_BadFormat(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/login", `{bad json`, nil)
	if env.Code != apperrors.CodeBadFormat {
		t.Fatalf("code=%d（期望 %d 格式错误）", env.Code, apperrors.CodeBadFormat)
	}
}

// ---- Issue（两步第二步）----

// TestIssue_Success 合法票据 + 归属作用域：code 200，data 含 accessToken + institutionId + roles。
func TestIssue_Success(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addArgon2User(uid, "testuser", "correct-password")
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "active",
	})
	ticket := fx.login("testuser", "correct-password")

	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/issue",
		`{"loginTicket":"`+ticket+`","institutionId":11,"campusId":3}`, nil)
	if env.Code != 200 || !env.Success {
		t.Fatalf("code=%d msg=%s（期望 200 成功）", env.Code, env.Message)
	}
	var pair struct {
		AccessToken   string   `json:"accessToken"`
		RefreshToken  string   `json:"refreshToken"`
		InstitutionID int64    `json:"institutionId"`
		CampusID      int64    `json:"campusId"`
		Roles         []string `json:"roles"`
	}
	if err := json.Unmarshal(env.Data, &pair); err != nil {
		t.Fatalf("解析 data 失败: %v", err)
	}
	if pair.AccessToken == "" || pair.RefreshToken == "" {
		t.Fatalf("accessToken/refreshToken 缺失: %+v", pair)
	}
	if pair.InstitutionID != 11 || pair.CampusID != 3 {
		t.Fatalf("作用域=%d/%d（期望 11/3）", pair.InstitutionID, pair.CampusID)
	}
	if len(pair.Roles) != 1 || pair.Roles[0] != "teacher" {
		t.Fatalf("roles=%v（期望 [teacher]）", pair.Roles)
	}
	// access 应可被本公钥验签
	claims, err := token.Verify(context.Background(), fx.pubKeys, nil, "https://unified.test", pair.AccessToken)
	if err != nil {
		t.Fatalf("验签 access 失败: %v", err)
	}
	if claims.Sub != uid {
		t.Fatalf("claims.Sub=%q（期望 %q）", claims.Sub, uid)
	}
}

// TestIssue_InvalidTicket 非法/不存在票据：code 1001。
func TestIssue_InvalidTicket(t *testing.T) {
	fx := newFixture(t)
	fx.addArgon2User("01GAQF0Z6C1V9Y3E5H7K2M8B4T", "testuser", "correct-password")
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/issue",
		`{"loginTicket":"00000000000000000000000000000000","institutionId":11,"campusId":3}`, nil)
	if env.Code != apperrors.CodeUnauth {
		t.Fatalf("code=%d（期望 %d 票据失效）", env.Code, apperrors.CodeUnauth)
	}
}

// TestIssue_ReplayTicket 同一票据二次消费：code 1001（GETDEL 原子，防重放）。
func TestIssue_ReplayTicket(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addArgon2User(uid, "testuser", "correct-password")
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "active",
	})
	ticket := fx.login("testuser", "correct-password")

	app := fx.newApp(nil)
	body := `{"loginTicket":"` + ticket + `","institutionId":11,"campusId":3}`
	if env := do(fx.t, app, http.MethodPost, "/auth/issue", body, nil); env.Code != 200 {
		t.Fatalf("首次消费 code=%d（期望 200）", env.Code)
	}
	// 重放：票据已被 GETDEL 消费，应失效
	env := do(fx.t, app, http.MethodPost, "/auth/issue", body, nil)
	if env.Code != apperrors.CodeUnauth {
		t.Fatalf("重放 code=%d（期望 %d 票据已消费）", env.Code, apperrors.CodeUnauth)
	}
}

// TestIssue_ScopeNotBelong 作用域不属于该账号：code 1003（越权）。
func TestIssue_ScopeNotBelong(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addArgon2User(uid, "testuser", "correct-password")
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "active",
	})
	ticket := fx.login("testuser", "correct-password")

	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/issue",
		`{"loginTicket":"`+ticket+`","institutionId":99,"campusId":99}`, nil)
	if env.Code != apperrors.CodeForbidden {
		t.Fatalf("code=%d（期望 %d 作用域越权）", env.Code, apperrors.CodeForbidden)
	}
}

// TestIssue_ScopeInactive 归属已失效(inactive)：code 1003。
func TestIssue_ScopeInactive(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addArgon2User(uid, "testuser", "correct-password")
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "inactive",
	})
	ticket := fx.login("testuser", "correct-password")

	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/issue",
		`{"loginTicket":"`+ticket+`","institutionId":11,"campusId":3}`, nil)
	if env.Code != apperrors.CodeForbidden {
		t.Fatalf("code=%d（期望 %d 归属失效）", env.Code, apperrors.CodeForbidden)
	}
}

// TestIssue_BadParam 票据长度非 32：code 2001。
func TestIssue_BadParam(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/issue",
		`{"loginTicket":"short","institutionId":11,"campusId":3}`, nil)
	if env.Code != apperrors.CodeBadParam {
		t.Fatalf("code=%d（期望 %d 参数校验）", env.Code, apperrors.CodeBadParam)
	}
}

// ---- Me（受保护）----

// TestMe_Success 已验签 claims 注入：code 200，data 含 user + roles + 作用域 + memberships。
func TestMe_Success(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addArgon2User(uid, "testuser", "correct-password")
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "active",
	})
	claims := &token.Claims{Sub: uid, Roles: []string{"teacher"}, InstitutionID: 11, CampusID: 3}

	app := fx.newApp(claims)
	env := do(fx.t, app, http.MethodGet, "/auth/me", "", nil)
	if env.Code != 200 || !env.Success {
		t.Fatalf("code=%d msg=%s（期望 200 成功）", env.Code, env.Message)
	}
	var me struct {
		ID            string   `json:"id"`
		Roles         []string `json:"roles"`
		InstitutionID int64    `json:"institutionId"`
		CampusID      int64    `json:"campusId"`
		Memberships   []struct {
			Role string `json:"role"`
		} `json:"memberships"`
	}
	if err := json.Unmarshal(env.Data, &me); err != nil {
		t.Fatalf("解析 data 失败: %v", err)
	}
	if me.ID != uid {
		t.Fatalf("id=%q（期望 %q）", me.ID, uid)
	}
	if len(me.Memberships) != 1 || me.Memberships[0].Role != "teacher" {
		t.Fatalf("memberships=%+v（期望 1 条 teacher）", me.Memberships)
	}
}

// TestMe_Unauth 无 claims（中间件未注入）：code 1001（未登录）。
func TestMe_Unauth(t *testing.T) {
	fx := newFixture(t)
	fx.addArgon2User("01GAQF0Z6C1V9Y3E5H7K2M8B4T", "testuser", "correct-password")
	app := fx.newApp(nil) // 无 claims
	env := do(fx.t, app, http.MethodGet, "/auth/me", "", nil)
	if env.Code != apperrors.CodeUnauth {
		t.Fatalf("code=%d（期望 %d 未登录）", env.Code, apperrors.CodeUnauth)
	}
}

// ---- Refresh ----

// TestRefresh_Success 合法 refresh：code 200，返回新 token 对。
func TestRefresh_Success(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addArgon2User(uid, "testuser", "correct-password")
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "active",
	})
	ticket := fx.login("testuser", "correct-password")
	app := fx.newApp(nil)
	issueEnv := do(fx.t, app, http.MethodPost, "/auth/issue",
		`{"loginTicket":"`+ticket+`","institutionId":11,"campusId":3}`, nil)
	if issueEnv.Code != 200 {
		t.Fatalf("issue code=%d（期望 200）", issueEnv.Code)
	}
	var pair struct {
		AccessToken  string `json:"accessToken"`
		RefreshToken string `json:"refreshToken"`
	}
	_ = json.Unmarshal(issueEnv.Data, &pair)

	// 用旧 refresh 轮换
	env := do(fx.t, app, http.MethodPost, "/auth/refresh",
		`{"refreshToken":"`+pair.RefreshToken+`"}`, nil)
	if env.Code != 200 {
		t.Fatalf("refresh code=%d msg=%s（期望 200）", env.Code, env.Message)
	}
}

// TestRefresh_Invalid 合法格式（64 hex）但不在白名单：code 1002（登录态失效，前端跳登录）。
func TestRefresh_Invalid(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/refresh",
		`{"refreshToken":"`+strings.Repeat("0", 64)+`"}`, nil)
	if env.Code != apperrors.CodeTokenExpired {
		t.Fatalf("code=%d（期望 %d 登录态失效）", env.Code, apperrors.CodeTokenExpired)
	}
}

// TestRefresh_BadParam refresh 长度非 48：code 2001。
func TestRefresh_BadParam(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/refresh", `{"refreshToken":"too-short"}`, nil)
	if env.Code != apperrors.CodeBadParam {
		t.Fatalf("code=%d（期望 %d 参数校验）", env.Code, apperrors.CodeBadParam)
	}
}

// ---- Logout（恒 200 幂等）----

// TestLogout_Success 有 claims + refresh：恒 code 200。
func TestLogout_Success(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addArgon2User(uid, "testuser", "correct-password")
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "active",
	})
	ticket := fx.login("testuser", "correct-password")
	app := fx.newApp(nil)
	issueEnv := do(fx.t, app, http.MethodPost, "/auth/issue",
		`{"loginTicket":"`+ticket+`","institutionId":11,"campusId":3}`, nil)
	var pair struct {
		RefreshToken string `json:"refreshToken"`
	}
	_ = json.Unmarshal(issueEnv.Data, &pair)

	// 带 claims 登出（模拟已验签中间件写入）
	claims := &token.Claims{Sub: uid, Roles: []string{"teacher"}, InstitutionID: 11, CampusID: 3, ID: "some-jti"}
	appAuth := fx.newApp(claims)
	env := do(fx.t, appAuth, http.MethodPost, "/auth/logout",
		`{"refreshToken":"`+pair.RefreshToken+`"}`, nil)
	if env.Code != 200 || !env.Success {
		t.Fatalf("logout code=%d（期望恒 200 幂等）", env.Code)
	}
}

// TestLogout_NoClaims 无 claims：仍恒 code 200（本地态必清）。
func TestLogout_NoClaims(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodPost, "/auth/logout", `{}`, nil)
	if env.Code != 200 {
		t.Fatalf("logout code=%d（期望恒 200）", env.Code)
	}
}

// ---- 微信扫码登录（状态机 + 复用两步票据）----

// TestWechatQrcode_Success 生成二维码：code 200，data 含 state(32hex) + qrUrl(含 state) + campusId + expiresIn。
func TestWechatQrcode_Success(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodGet, "/auth/wechat/qrcode", "", nil)
	if env.Code != 200 || !env.Success {
		t.Fatalf("code=%d msg=%s（期望 200 成功）", env.Code, env.Message)
	}
	var qr struct {
		State     string `json:"state"`
		QRURL     string `json:"qrUrl"`
		CampusID  int64  `json:"campusId"`
		ExpiresIn int64  `json:"expiresIn"`
	}
	if err := json.Unmarshal(env.Data, &qr); err != nil {
		t.Fatalf("解析 data 失败: %v", err)
	}
	if len(qr.State) != 32 {
		t.Fatalf("state 长度=%d（期望 32 hex）", len(qr.State))
	}
	if !strings.Contains(qr.QRURL, "open.weixin.qq.com/connect/qrconnect") {
		t.Fatalf("qrUrl=%q（期望微信网页授权 URL）", qr.QRURL)
	}
	if !strings.Contains(qr.QRURL, "state="+qr.State) {
		t.Fatalf("qrUrl=%q（期望携带 state=%q）", qr.QRURL, qr.State)
	}
	if qr.CampusID != 3 {
		t.Fatalf("campusId=%d（期望 3，配置首个 campus）", qr.CampusID)
	}
	if qr.ExpiresIn <= 0 {
		t.Fatalf("expiresIn=%d（期望 >0 秒）", qr.ExpiresIn)
	}
}

// TestWechatStatus_Pending 新 state 轮询：status=pending（继续轮询）。
func TestWechatStatus_Pending(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	qr := do(fx.t, app, http.MethodGet, "/auth/wechat/qrcode", "", nil)
	var q struct {
		State string `json:"state"`
	}
	_ = json.Unmarshal(qr.Data, &q)
	env := do(fx.t, app, http.MethodGet, "/auth/wechat/status?state="+q.State, "", nil)
	if env.Code != 200 {
		t.Fatalf("code=%d msg=%s（期望 200）", env.Code, env.Message)
	}
	var st struct {
		Status string `json:"status"`
	}
	if err := json.Unmarshal(env.Data, &st); err != nil {
		t.Fatalf("解析 data 失败: %v", err)
	}
	if st.Status != "pending" {
		t.Fatalf("status=%q（期望 pending）", st.Status)
	}
}

// TestWechatStatus_Expired 未知 state 轮询：expired=true（前端停轮询，提示刷新）。
func TestWechatStatus_Expired(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodGet, "/auth/wechat/status?state=doesnotexist00000000000000000000", "", nil)
	if env.Code != 200 {
		t.Fatalf("code=%d msg=%s（期望 200，expired 语义非故障）", env.Code, env.Message)
	}
	var st struct {
		Expired bool `json:"expired"`
	}
	if err := json.Unmarshal(env.Data, &st); err != nil {
		t.Fatalf("解析 data 失败: %v", err)
	}
	if !st.Expired {
		t.Fatal("未知 state 应 expired=true")
	}
}

// TestWechatCallback_Success 扫码成功（已绑定）：code 换 openid → 发 loginTicket → status=success。
// 校验：callback 返回 success + loginTicket + userId；state 内票据可被 ② issue 消费（复用两步②）。
func TestWechatCallback_Success(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addWechatUser(uid, "openid-bound")
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "active",
	})
	fx.wechat.byCode["code-ok"] = "openid-bound"

	app := fx.newApp(nil)
	// ① 生成二维码
	qrEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/qrcode", "", nil)
	var qr struct {
		State string `json:"state"`
	}
	_ = json.Unmarshal(qrEnv.Data, &qr)

	// ② 微信回调：code=code-ok, state=<state>
	cbEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/callback?code=code-ok&state="+qr.State, "", nil)
	if cbEnv.Code != 200 {
		t.Fatalf("callback code=%d msg=%s（期望 200 成功）", cbEnv.Code, cbEnv.Message)
	}
	var cb struct {
		Status      string `json:"status"`
		LoginTicket string `json:"loginTicket"`
		UserID      string `json:"userId"`
		Memberships []struct {
			InstitutionID int64  `json:"institutionId"`
			CampusID      int64  `json:"campusId"`
			Role          string `json:"role"`
		} `json:"memberships"`
	}
	if err := json.Unmarshal(cbEnv.Data, &cb); err != nil {
		t.Fatalf("解析 callback data 失败: %v", err)
	}
	if cb.Status != "success" {
		t.Fatalf("status=%q（期望 success）", cb.Status)
	}
	if cb.UserID != uid {
		t.Fatalf("userId=%q（期望 %q）", cb.UserID, uid)
	}
	if cb.LoginTicket == "" || len(cb.LoginTicket) != 32 {
		t.Fatalf("loginTicket=%q（期望 32 hex）", cb.LoginTicket)
	}
	// success 应回显可选作用域列表（与账密登录 LoginStep1 同源；前端据此走同一套 ② 分流）
	if len(cb.Memberships) != 1 || cb.Memberships[0].Role != "teacher" || cb.Memberships[0].InstitutionID != 11 {
		t.Fatalf("memberships=%+v（期望 1 条 inst=11 role=teacher）", cb.Memberships)
	}

	// ③ 轮询确认 state=success 且携带同一 loginTicket
	stEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/status?state="+qr.State, "", nil)
	var st struct {
		Status      string `json:"status"`
		LoginTicket string `json:"loginTicket"`
	}
	_ = json.Unmarshal(stEnv.Data, &st)
	if st.Status != "success" || st.LoginTicket != cb.LoginTicket {
		t.Fatalf("轮询 status=%q ticket=%q（期望 success + 同票据）", st.Status, st.LoginTicket)
	}

	// ④ 复用两步②：携 loginTicket 签 token（证明微信登录与账密登录走同一套 ②）
	issueEnv := do(fx.t, app, http.MethodPost, "/auth/issue",
		`{"loginTicket":"`+cb.LoginTicket+`","institutionId":11,"campusId":3}`, nil)
	if issueEnv.Code != 200 {
		t.Fatalf("issue code=%d msg=%s（期望 200：微信票据应可走同一套 ②）", issueEnv.Code, issueEnv.Message)
	}
}

// TestWechatCallback_Unbound 扫码成功但 openid 未绑定：status=unbound（前端提示"未绑定账号"）。
func TestWechatCallback_Unbound(t *testing.T) {
	fx := newFixture(t)
	fx.wechat.byCode["code-x"] = "openid-not-bound" // 不造该 openid 的身份记录

	app := fx.newApp(nil)
	qrEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/qrcode", "", nil)
	var qr struct {
		State string `json:"state"`
	}
	_ = json.Unmarshal(qrEnv.Data, &qr)

	cbEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/callback?code=code-x&state="+qr.State, "", nil)
	if cbEnv.Code != 200 {
		t.Fatalf("callback code=%d msg=%s（期望 200，unbound 语义）", cbEnv.Code, cbEnv.Message)
	}
	var cb struct {
		Status string `json:"status"`
	}
	_ = json.Unmarshal(cbEnv.Data, &cb)
	if cb.Status != "unbound" {
		t.Fatalf("status=%q（期望 unbound）", cb.Status)
	}
}

// TestWechatCallback_ThirdPartyFail 微信换 openid 失败：status=fail + code 4003（第三方超时/失败）。
func TestWechatCallback_ThirdPartyFail(t *testing.T) {
	fx := newFixture(t)
	fx.wechat.fail = true // 打桩：换 openid 失败

	app := fx.newApp(nil)
	qrEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/qrcode", "", nil)
	var qr struct {
		State string `json:"state"`
	}
	_ = json.Unmarshal(qrEnv.Data, &qr)

	cbEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/callback?code=bad&state="+qr.State, "", nil)
	if cbEnv.Code != apperrors.CodeThirdTimeout {
		t.Fatalf("callback code=%d（期望 %d 第三方失败）", cbEnv.Code, apperrors.CodeThirdTimeout)
	}
	// state 应被置 fail（前端后续轮询读到 fail）
	stEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/status?state="+qr.State, "", nil)
	var st struct {
		Status string `json:"status"`
	}
	_ = json.Unmarshal(stEnv.Data, &st)
	if st.Status != "fail" {
		t.Fatalf("state 应置 fail，实际 %q", st.Status)
	}
}

// TestWechatCallback_Replay 已终态 state 二次回调：code 1001（防重放）。
func TestWechatCallback_Replay(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addWechatUser(uid, "openid-bound")
	fx.wechat.byCode["code-ok"] = "openid-bound"

	app := fx.newApp(nil)
	qrEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/qrcode", "", nil)
	var qr struct {
		State string `json:"state"`
	}
	_ = json.Unmarshal(qrEnv.Data, &qr)

	// 首次回调 → success（终态）
	if env := do(fx.t, app, http.MethodGet, "/auth/wechat/callback?code=code-ok&state="+qr.State, "", nil); env.Code != 200 {
		t.Fatalf("首次回调 code=%d（期望 200）", env.Code)
	}
	// 二次回同样 state → 1001（已终态，防重放）
	env := do(fx.t, app, http.MethodGet, "/auth/wechat/callback?code=code-ok&state="+qr.State, "", nil)
	if env.Code != apperrors.CodeUnauth {
		t.Fatalf("重放 callback code=%d（期望 %d 已终态）", env.Code, apperrors.CodeUnauth)
	}
}

// TestWechatCallback_MissingParam 缺 code 或 state：code 2001（参数校验）。
func TestWechatCallback_MissingParam(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodGet, "/auth/wechat/callback?code=only-code", "", nil)
	if env.Code != apperrors.CodeBadParam {
		t.Fatalf("code=%d（期望 %d 缺 state 参数）", env.Code, apperrors.CodeBadParam)
	}
}

// TestWechat_NotConfigured wechat 服务未注入：qrcode/status/callback 均 code 4004（未配置）。
func TestWechat_NotConfigured(t *testing.T) {
	fx := newFixture(t)
	// 构造一个 wechat 为 nil 的 handler（复用 fx.svc 之外的 AuthService，此处直接重造 Handler）
	svc := fx.handler.svc // 复用现有 svc
	h, err := New(Config{Svc: svc}) // Wechat 缺省 nil
	if err != nil {
		t.Fatalf("New Handler: %v", err)
	}
	app := fiber.New(fiber.Config{DisableStartupMessage: true})
	app.Get("/auth/wechat/qrcode", h.WechatQrcode)
	app.Get("/auth/wechat/authorize", h.WechatAuthorize)
	app.Get("/auth/wechat/status", h.WechatStatus)
	app.Get("/auth/wechat/callback", h.WechatCallback)

	for _, path := range []string{
		"/auth/wechat/qrcode",
		"/auth/wechat/authorize",
		"/auth/wechat/status?state=x",
		"/auth/wechat/callback?code=x&state=x",
	} {
		env := do(fx.t, app, http.MethodGet, path, "", nil)
		if env.Code != apperrors.CodeThirdNotConfigured {
			t.Fatalf("%s code=%d（期望 %d 未配置）", path, env.Code, apperrors.CodeThirdNotConfigured)
		}
	}
}

// ---- 移动端 App 内微信授权（webview，snsapi_userinfo）----

// TestWechatAuthorize_Success 生成授权 URL：code 200，data 含 state(32hex) + authorizeUrl(oauth2/authorize + snsapi_userinfo)
// + campusId + expiresIn。authorizeUrl 与 qrUrl 的差异：endpoint=oauth2/authorize（非 qrconnect）、
// scope=snsapi_userinfo（非 snsapi_login）、**无** #wechat_redirect 尾段。
func TestWechatAuthorize_Success(t *testing.T) {
	fx := newFixture(t)
	app := fx.newApp(nil)
	env := do(fx.t, app, http.MethodGet, "/auth/wechat/authorize", "", nil)
	if env.Code != 200 || !env.Success {
		t.Fatalf("code=%d msg=%s（期望 200 成功）", env.Code, env.Message)
	}
	var ar struct {
		State        string `json:"state"`
		AuthorizeURL string `json:"authorizeUrl"`
		CampusID     int64  `json:"campusId"`
		ExpiresIn    int64  `json:"expiresIn"`
	}
	if err := json.Unmarshal(env.Data, &ar); err != nil {
		t.Fatalf("解析 data 失败: %v", err)
	}
	if len(ar.State) != 32 {
		t.Fatalf("state 长度=%d（期望 32 hex）", len(ar.State))
	}
	// endpoint 应为 oauth2/authorize（非 qrconnect）
	if !strings.Contains(ar.AuthorizeURL, "open.weixin.qq.com/connect/oauth2/authorize") {
		t.Fatalf("authorizeUrl=%q（期望 connect/oauth2/authorize）", ar.AuthorizeURL)
	}
	// scope 应为 snsapi_userinfo（非 snsapi_login）
	if !strings.Contains(ar.AuthorizeURL, "scope=snsapi_userinfo") {
		t.Fatalf("authorizeUrl=%q（期望 scope=snsapi_userinfo）", ar.AuthorizeURL)
	}
	// 无 #wechat_redirect 尾段（webview 场景不保留）
	if strings.Contains(ar.AuthorizeURL, "#wechat_redirect") {
		t.Fatalf("authorizeUrl=%q（webview 场景不应含 #wechat_redirect）", ar.AuthorizeURL)
	}
	if !strings.Contains(ar.AuthorizeURL, "state="+ar.State) {
		t.Fatalf("authorizeUrl=%q（期望携带 state=%q）", ar.AuthorizeURL, ar.State)
	}
	if ar.CampusID != 3 {
		t.Fatalf("campusId=%d（期望 3，配置首个 campus）", ar.CampusID)
	}
	if ar.ExpiresIn <= 0 {
		t.Fatalf("expiresIn=%d（期望 >0 秒）", ar.ExpiresIn)
	}
}

// TestWechatAuthorize_ReuseCallback 授权 URL 的 state 可被同一 /auth/wechat/callback 消费
// （证明 PC 扫码与移动 webview 共用同一 callback 换 openid，无需独立端点）。
func TestWechatAuthorize_ReuseCallback(t *testing.T) {
	fx := newFixture(t)
	uid := "01GAQF0Z6C1V9Y3E5H7K2M8B4T"
	fx.addWechatUser(uid, "openid-mobile")
	fx.memberships.add(uid, orgmodel.Membership{
		MembershipID: 1, CanonicalUserID: uid, InstitutionID: 11, CampusID: 3,
		Role: "teacher", Status: "active",
	})
	fx.wechat.byCode["code-mobile"] = "openid-mobile"

	app := fx.newApp(nil)
	// ① 生成移动 webview 授权 URL
	authEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/authorize", "", nil)
	var ar struct {
		State string `json:"state"`
	}
	_ = json.Unmarshal(authEnv.Data, &ar)

	// ② 模拟微信重定向回 callback（同 PC 扫码的同一端点）
	cbEnv := do(fx.t, app, http.MethodGet, "/auth/wechat/callback?code=code-mobile&state="+ar.State, "", nil)
	if cbEnv.Code != 200 {
		t.Fatalf("callback code=%d msg=%s（期望 200 成功）", cbEnv.Code, cbEnv.Message)
	}
	var cb struct {
		Status      string `json:"status"`
		LoginTicket string `json:"loginTicket"`
	}
	_ = json.Unmarshal(cbEnv.Data, &cb)
	if cb.Status != "success" || cb.LoginTicket == "" {
		t.Fatalf("status=%q ticket=%q（期望 success + 票据）", cb.Status, cb.LoginTicket)
	}
}

// md5Hex 计算 md5 的 hex 小写串（构造 md5_salt 测试夹具用，与 credential.legacyDigest 同语义）。
func md5Hex(s string) string {
	d := md5.Sum([]byte(s))
	return hex.EncodeToString(d[:])
}