feat(v2): LimitAware 真实用量源——DBUsageSource 快照 + 对账 job 周期聚合当日已收(替 NopUsage)

internal/reconcile/usage_test.go

@@ -0,0 +1,37 @@
+package reconcile_test
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/wangjia/pay/internal/accounts"
+	"github.com/wangjia/pay/internal/model"
+	"github.com/wangjia/pay/internal/reconcile"
+	"github.com/wangjia/pay/internal/store"
+)
+
+func TestUsageSourceRefreshAndInterface(t *testing.T) {
+	db := model.OpenTestDB(t)
+	s := store.NewOrderStore(db)
+	now := time.Date(2026, 7, 10, 12, 0, 0, 0, time.UTC)
+	paid := now.Add(-time.Hour)
+	_ = s.CreateAttempt(&model.Attempt{OutTradeNo: "A", Channel: "alipay", AccountID: "acct-1",
+		ProviderRef: "R-A", AmountMinor: 12000, Currency: "CNY", Status: model.AttemptPaid, PaidAt: &paid})
+
+	u := reconcile.NewUsageSource(s, func() time.Time { return now })
+	var _ accounts.UsageSource = u // 编译期断言满足接口
+
+	if u.TodayUsedMinor("acct-1") != 0 {
+		t.Fatalf("刷新前应 0")
+	}
+	if err := u.Refresh(context.Background()); err != nil {
+		t.Fatalf("refresh: %v", err)
+	}
+	if u.TodayUsedMinor("acct-1") != 12000 {
+		t.Fatalf("刷新后 acct-1 应 12000, got %d", u.TodayUsedMinor("acct-1"))
+	}
+	if u.TodayUsedMinor("unknown") != 0 {
+		t.Fatalf("未知账户应 0")
+	}
+}