fix(定时轮): 初始化失败返回错误并补充单测

- NewTimingWheelService 改为返回 error，避免 panic

- ProvideTimingWheelService 透传 error 并更新 wire 生成代码

- 补充定时任务调度/取消/周期任务相关单元测试

backend/cmd/server/wire_gen.go

@@ -78,7 +78,10 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	dashboardAggregationRepository := repository.NewDashboardAggregationRepository(db)
 	dashboardStatsCache := repository.NewDashboardCache(redisClient, configConfig)
 	dashboardService := service.NewDashboardService(usageLogRepository, dashboardAggregationRepository, dashboardStatsCache, configConfig)
-	timingWheelService := service.ProvideTimingWheelService()
+	timingWheelService, err := service.ProvideTimingWheelService()
+	if err != nil {
+		return nil, err
+	}
 	dashboardAggregationService := service.ProvideDashboardAggregationService(dashboardAggregationRepository, timingWheelService, configConfig)
 	dashboardHandler := admin.NewDashboardHandler(dashboardService, dashboardAggregationService)
 	accountRepository := repository.NewAccountRepository(client, db)

backend/internal/service/timing_wheel_service.go

 package service
 
 import (
+	"fmt"
 	"log"
 	"sync"
 	"time"
@@ -8,6 +9,8 @@ import (
 	"github.com/zeromicro/go-zero/core/collection"
 )
 
+var newTimingWheel = collection.NewTimingWheel
+
 // TimingWheelService wraps go-zero's TimingWheel for task scheduling
 type TimingWheelService struct {
 	tw       *collection.TimingWheel
@@ -15,18 +18,18 @@ type TimingWheelService struct {
 }
 
 // NewTimingWheelService creates a new TimingWheelService instance
-func NewTimingWheelService() *TimingWheelService {
+func NewTimingWheelService() (*TimingWheelService, error) {
 	// 1 second tick, 3600 slots = supports up to 1 hour delay
 	// execute function: runs func() type tasks
-	tw, err := collection.NewTimingWheel(1*time.Second, 3600, func(key, value any) {
+	tw, err := newTimingWheel(1*time.Second, 3600, func(key, value any) {
 		if fn, ok := value.(func()); ok {
 			fn()
 		}
 	})
 	if err != nil {
-		panic(err)
+		return nil, fmt.Errorf("创建 timing wheel 失败: %w", err)
 	}
-	return &TimingWheelService{tw: tw}
+	return &TimingWheelService{tw: tw}, nil
 }
 
 // Start starts the timing wheel

backend/internal/service/timing_wheel_service_test.go

+package service
+
+import (
+	"errors"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/zeromicro/go-zero/core/collection"
+)
+
+func TestNewTimingWheelService_InitFail_NoPanicAndReturnError(t *testing.T) {
+	original := newTimingWheel
+	t.Cleanup(func() { newTimingWheel = original })
+
+	newTimingWheel = func(_ time.Duration, _ int, _ collection.Execute) (*collection.TimingWheel, error) {
+		return nil, errors.New("boom")
+	}
+
+	svc, err := NewTimingWheelService()
+	if err == nil {
+		t.Fatalf("期望返回 error，但得到 nil")
+	}
+	if svc != nil {
+		t.Fatalf("期望返回 nil svc，但得到非空")
+	}
+}
+
+func TestNewTimingWheelService_Success(t *testing.T) {
+	svc, err := NewTimingWheelService()
+	if err != nil {
+		t.Fatalf("期望 err 为 nil，但得到: %v", err)
+	}
+	if svc == nil {
+		t.Fatalf("期望 svc 非空，但得到 nil")
+	}
+	svc.Stop()
+}
+
+func TestNewTimingWheelService_ExecuteCallbackRunsFunc(t *testing.T) {
+	original := newTimingWheel
+	t.Cleanup(func() { newTimingWheel = original })
+
+	var captured collection.Execute
+	newTimingWheel = func(interval time.Duration, numSlots int, execute collection.Execute) (*collection.TimingWheel, error) {
+		captured = execute
+		return original(interval, numSlots, execute)
+	}
+
+	svc, err := NewTimingWheelService()
+	if err != nil {
+		t.Fatalf("期望 err 为 nil，但得到: %v", err)
+	}
+	if captured == nil {
+		t.Fatalf("期望 captured 非空，但得到 nil")
+	}
+
+	called := false
+	captured("k", func() { called = true })
+	if !called {
+		t.Fatalf("期望 execute 回调触发传入函数执行")
+	}
+
+	svc.Stop()
+}
+
+func TestTimingWheelService_Schedule_ExecutesOnce(t *testing.T) {
+	original := newTimingWheel
+	t.Cleanup(func() { newTimingWheel = original })
+
+	newTimingWheel = func(_ time.Duration, _ int, execute collection.Execute) (*collection.TimingWheel, error) {
+		return original(10*time.Millisecond, 128, execute)
+	}
+
+	svc, err := NewTimingWheelService()
+	if err != nil {
+		t.Fatalf("期望 err 为 nil，但得到: %v", err)
+	}
+	defer svc.Stop()
+
+	ch := make(chan struct{}, 1)
+	svc.Schedule("once", 30*time.Millisecond, func() { ch <- struct{}{} })
+
+	select {
+	case <-ch:
+	case <-time.After(500 * time.Millisecond):
+		t.Fatalf("等待任务执行超时")
+	}
+
+	select {
+	case <-ch:
+		t.Fatalf("任务不应重复执行")
+	case <-time.After(80 * time.Millisecond):
+	}
+}
+
+func TestTimingWheelService_Cancel_PreventsExecution(t *testing.T) {
+	original := newTimingWheel
+	t.Cleanup(func() { newTimingWheel = original })
+
+	newTimingWheel = func(_ time.Duration, _ int, execute collection.Execute) (*collection.TimingWheel, error) {
+		return original(10*time.Millisecond, 128, execute)
+	}
+
+	svc, err := NewTimingWheelService()
+	if err != nil {
+		t.Fatalf("期望 err 为 nil，但得到: %v", err)
+	}
+	defer svc.Stop()
+
+	ch := make(chan struct{}, 1)
+	svc.Schedule("cancel", 80*time.Millisecond, func() { ch <- struct{}{} })
+	svc.Cancel("cancel")
+
+	select {
+	case <-ch:
+		t.Fatalf("任务已取消，不应执行")
+	case <-time.After(200 * time.Millisecond):
+	}
+}
+
+func TestTimingWheelService_ScheduleRecurring_ExecutesMultipleTimes(t *testing.T) {
+	original := newTimingWheel
+	t.Cleanup(func() { newTimingWheel = original })
+
+	newTimingWheel = func(_ time.Duration, _ int, execute collection.Execute) (*collection.TimingWheel, error) {
+		return original(10*time.Millisecond, 128, execute)
+	}
+
+	svc, err := NewTimingWheelService()
+	if err != nil {
+		t.Fatalf("期望 err 为 nil，但得到: %v", err)
+	}
+	defer svc.Stop()
+
+	var count int32
+	svc.ScheduleRecurring("rec", 30*time.Millisecond, func() { atomic.AddInt32(&count, 1) })
+
+	deadline := time.Now().Add(500 * time.Millisecond)
+	for atomic.LoadInt32(&count) < 2 && time.Now().Before(deadline) {
+		time.Sleep(10 * time.Millisecond)
+	}
+	if atomic.LoadInt32(&count) < 2 {
+		t.Fatalf("期望周期任务至少执行 2 次，但只执行了 %d 次", atomic.LoadInt32(&count))
+	}
+}

backend/internal/service/wire.go

@@ -65,10 +65,13 @@ func ProvideAccountExpiryService(accountRepo AccountRepository) *AccountExpirySe
 }
 
 // ProvideTimingWheelService creates and starts TimingWheelService
-func ProvideTimingWheelService() *TimingWheelService {
-	svc := NewTimingWheelService()
+func ProvideTimingWheelService() (*TimingWheelService, error) {
+	svc, err := NewTimingWheelService()
+	if err != nil {
+		return nil, err
+	}
 	svc.Start()
-	return svc
+	return svc, nil
 }
 
 // ProvideDeferredService creates and starts DeferredService

backend/internal/service/wire_test.go

+package service
+
+import (
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/zeromicro/go-zero/core/collection"
+)
+
+func TestProvideTimingWheelService_ReturnsError(t *testing.T) {
+	original := newTimingWheel
+	t.Cleanup(func() { newTimingWheel = original })
+
+	newTimingWheel = func(_ time.Duration, _ int, _ collection.Execute) (*collection.TimingWheel, error) {
+		return nil, errors.New("boom")
+	}
+
+	svc, err := ProvideTimingWheelService()
+	if err == nil {
+		t.Fatalf("期望返回 error，但得到 nil")
+	}
+	if svc != nil {
+		t.Fatalf("期望返回 nil svc，但得到非空")
+	}
+}
+
+func TestProvideTimingWheelService_Success(t *testing.T) {
+	svc, err := ProvideTimingWheelService()
+	if err != nil {
+		t.Fatalf("期望 err 为 nil，但得到: %v", err)
+	}
+	if svc == nil {
+		t.Fatalf("期望 svc 非空，但得到 nil")
+	}
+	svc.Stop()
+}