feat(v2): webhook 投递硬化——指数退避 + 最大次数死信 + 告警钩子(替裸 60s 猛敲)

internal/store/webhook_test.go

@@ -2,6 +2,7 @@ package store_test
 
 import (
 	"testing"
+	"time"
 	"unicode/utf8"
 
 	"github.com/wangjia/pay/internal/model"
@@ -104,3 +105,35 @@ func TestEnqueueDeliveryRefundIDUnique(t *testing.T) {
 		t.Fatalf("undelivered rows = %d want 3: %+v", len(rows), rows)
 	}
 }
+
+func TestWebhookScheduleRetryAndDead(t *testing.T) {
+	ws := store.NewWebhookStore(model.OpenTestDB(t))
+	now := time.Date(2026, 7, 10, 12, 0, 0, 0, time.UTC)
+	_ = ws.EnqueueDelivery("PAY-1", "pangolin", "payment.succeeded", "", `{"x":1}`)
+
+	// 刚入队:next_attempt_at NULL → 立即可投。
+	rows, _ := ws.ListDeliverable(now, 10)
+	if len(rows) != 1 {
+		t.Fatalf("新单应可投, got %d", len(rows))
+	}
+	id := rows[0].ID
+
+	// 排下一次重试到 now+30s:此刻不可投,过点可投。
+	if err := ws.ScheduleRetry(id, "http 500", now.Add(30*time.Second)); err != nil {
+		t.Fatalf("schedule: %v", err)
+	}
+	if r, _ := ws.ListDeliverable(now, 10); len(r) != 0 {
+		t.Fatalf("退避窗内不应可投, got %d", len(r))
+	}
+	if r, _ := ws.ListDeliverable(now.Add(31*time.Second), 10); len(r) != 1 || r[0].Attempts != 1 {
+		t.Fatalf("过退避点应可投且 attempts=1, got %+v", r)
+	}
+
+	// 标死信:不再出现在可投集。
+	if err := ws.MarkDead(id, "gave up"); err != nil {
+		t.Fatalf("markdead: %v", err)
+	}
+	if r, _ := ws.ListDeliverable(now.Add(time.Hour), 10); len(r) != 0 {
+		t.Fatalf("死信不应可投, got %d", len(r))
+	}
+}