记录退款失败请求参数

backend/internal/integrations/payment/lakala/client_test.go

@@ -159,6 +159,53 @@ func TestCreatePaymentUsesShanghaiTimeWhenLocalIsUTC(t *testing.T) {
 	}
 }
 
+func TestCreateRefundReturnsRawRequestOnHTTPError(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != endpointRefund {
+			t.Fatalf("path = %s, want %s", r.URL.Path, endpointRefund)
+		}
+		w.WriteHeader(http.StatusBadRequest)
+		_, _ = w.Write([]byte(`{"code":"OP90001","msg":"请求服务失败"}`))
+	}))
+	defer server.Close()
+
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		t.Fatalf("generate key: %v", err)
+	}
+	privatePEM, certPEM := testKeyPairPEM(t, key)
+	client := NewClient(Config{
+		GatewayURL: server.URL,
+		AppID:      "app-1",
+		SerialNo:   "serial-1",
+		MerchantID: "merchant-1",
+		TermNo:     "term-1",
+		PrivateKey: privatePEM,
+		NotifyCert: certPEM,
+	})
+	resp, err := client.CreateRefund(context.Background(), CreateRefundRequest{
+		ThirdOrderID:     "PAY123",
+		ProviderOrderID:  "TRADE123",
+		MerchantRefundID: "REF123",
+		RefundAmountCent: 99,
+		RefundReason:     "结账退款",
+	})
+	if err == nil {
+		t.Fatal("CreateRefund error = nil, want HTTP error")
+	}
+	if resp == nil {
+		t.Fatal("CreateRefund response = nil, want raw request")
+	}
+	if resp.RawRequest["merchant_no"] != "merchant-1" ||
+		resp.RawRequest["term_no"] != "term-1" ||
+		resp.RawRequest["out_trade_no"] != "REF123" ||
+		resp.RawRequest["refund_amount"] != "99" ||
+		resp.RawRequest["origin_out_trade_no"] != "PAY123" ||
+		resp.RawRequest["origin_trade_no"] != "TRADE123" {
+		t.Fatalf("raw request = %#v", resp.RawRequest)
+	}
+}
+
 func parseLakalaTestTime(t *testing.T, value string) time.Time {
 	t.Helper()
 	parsed, err := time.ParseInLocation("20060102150405", value, timeutil.ShanghaiLocation())