test(pay): 补 fake 三态/MockChannelEnabled 装配/devmock 端点/gateway currency_mismatch/限流 bucket 回收

internal/provider/fake/fake_test.go

@@ -34,6 +34,54 @@ func TestFakeCreateAndVerify(t *testing.T) {
 	}
 }
 
+// TestFakeCreateRedirect 覆盖 Create 按 metadata["render"]="redirect" 出的 redirect
+// 三态分支(pangolin /buy 联调门控,见 fake.go Create 注释)。
+func TestFakeCreateRedirect(t *testing.T) {
+	p := fake.New()
+	ctx := context.Background()
+
+	sess, err := p.Create(ctx, provider.CreateRequest{
+		OutTradeNo: "PAY-REDIRECT-1", AmountMinor: 100, Currency: "USDT",
+		Metadata: map[string]string{"render": "redirect"},
+	})
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	if sess.RenderType != provider.RenderRedirect {
+		t.Fatalf("render_type = %v, want redirect", sess.RenderType)
+	}
+	url, _ := sess.Payload["url"].(string)
+	if !strings.Contains(url, "mock-cashier") || !strings.Contains(url, "PAY-REDIRECT-1") {
+		t.Fatalf("payload.url = %q, want 含 mock-cashier 与 out_trade_no", url)
+	}
+}
+
+// TestFakeCreateQR 覆盖 metadata["render"]="qr" 分支。
+func TestFakeCreateQR(t *testing.T) {
+	p := fake.New()
+	ctx := context.Background()
+
+	sess, err := p.Create(ctx, provider.CreateRequest{
+		OutTradeNo: "PAY-QR-1", AmountMinor: 12345, Currency: "CNY",
+		Metadata: map[string]string{"render": "qr"},
+	})
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	if sess.RenderType != provider.RenderQR {
+		t.Fatalf("render_type = %v, want qr", sess.RenderType)
+	}
+	if _, ok := sess.Payload["qr_content"]; !ok {
+		t.Fatalf("payload 缺 qr_content: %+v", sess.Payload)
+	}
+	if got := sess.Payload["display_amount"]; got != "12345" {
+		t.Fatalf("payload.display_amount = %v, want 12345", got)
+	}
+	if got := sess.Payload["currency"]; got != "CNY" {
+		t.Fatalf("payload.currency = %v, want CNY", got)
+	}
+}
+
 func TestFakeQueryPreset(t *testing.T) {
 	p := fake.New()
 	ctx := context.Background()