feat(idempotency): 为关键写接口接入幂等并完善并发容错

backend/internal/service/idempotency_cleanup_service_test.go

@@ -0,0 +1,69 @@
+package service
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/stretchr/testify/require"
+)
+
+type idempotencyCleanupRepoStub struct {
+	deleteCalls int
+	lastLimit   int
+	deleteErr   error
+}
+
+func (r *idempotencyCleanupRepoStub) CreateProcessing(context.Context, *IdempotencyRecord) (bool, error) {
+	return false, nil
+}
+func (r *idempotencyCleanupRepoStub) GetByScopeAndKeyHash(context.Context, string, string) (*IdempotencyRecord, error) {
+	return nil, nil
+}
+func (r *idempotencyCleanupRepoStub) TryReclaim(context.Context, int64, string, time.Time, time.Time, time.Time) (bool, error) {
+	return false, nil
+}
+func (r *idempotencyCleanupRepoStub) ExtendProcessingLock(context.Context, int64, string, time.Time, time.Time) (bool, error) {
+	return false, nil
+}
+func (r *idempotencyCleanupRepoStub) MarkSucceeded(context.Context, int64, int, string, time.Time) error {
+	return nil
+}
+func (r *idempotencyCleanupRepoStub) MarkFailedRetryable(context.Context, int64, string, time.Time, time.Time) error {
+	return nil
+}
+func (r *idempotencyCleanupRepoStub) DeleteExpired(_ context.Context, _ time.Time, limit int) (int64, error) {
+	r.deleteCalls++
+	r.lastLimit = limit
+	if r.deleteErr != nil {
+		return 0, r.deleteErr
+	}
+	return 1, nil
+}
+
+func TestNewIdempotencyCleanupService_UsesConfig(t *testing.T) {
+	repo := &idempotencyCleanupRepoStub{}
+	cfg := &config.Config{
+		Idempotency: config.IdempotencyConfig{
+			CleanupIntervalSeconds: 7,
+			CleanupBatchSize:       321,
+		},
+	}
+	svc := NewIdempotencyCleanupService(repo, cfg)
+	require.Equal(t, 7*time.Second, svc.interval)
+	require.Equal(t, 321, svc.batch)
+}
+
+func TestIdempotencyCleanupService_CleanupOnce(t *testing.T) {
+	repo := &idempotencyCleanupRepoStub{}
+	svc := NewIdempotencyCleanupService(repo, &config.Config{
+		Idempotency: config.IdempotencyConfig{
+			CleanupBatchSize: 99,
+		},
+	})
+
+	svc.cleanupOnce()
+	require.Equal(t, 1, repo.deleteCalls)
+	require.Equal(t, 99, repo.lastLimit)
+}