feat: add polar x tts and storage integration adapters with tests

test/polar-integration.test.js

@@ -0,0 +1,71 @@
+"use strict";
+
+const test = require("node:test");
+const assert = require("node:assert/strict");
+const {
+  createPolarAdapter,
+  normalizeTopUpPayload,
+  hasStandardWebhookHeaders,
+} = require("../src/integrations/polar");
+
+test("detects standard polar webhook headers", () => {
+  const ok = hasStandardWebhookHeaders({
+    "webhook-id": "a",
+    "webhook-timestamp": "b",
+    "webhook-signature": "c",
+  });
+
+  assert.equal(ok, true);
+});
+
+test("normalizeTopUpPayload supports legacy simple webhook shape", () => {
+  const parsed = normalizeTopUpPayload({ userId: "u1", credits: "12", eventId: "evt1" });
+  assert.equal(parsed.userId, "u1");
+  assert.equal(parsed.credits, 12);
+  assert.equal(parsed.eventId, "evt1");
+});
+
+test("normalizeTopUpPayload supports metadata-based order event shape", () => {
+  const parsed = normalizeTopUpPayload({
+    type: "order.paid",
+    data: {
+      id: "ord_1",
+      metadata: {
+        xartaudio_user_id: "u2",
+        xartaudio_credits: "20",
+      },
+    },
+  });
+
+  assert.equal(parsed.userId, "u2");
+  assert.equal(parsed.credits, 20);
+  assert.equal(parsed.eventId, "ord_1");
+});
+
+test("createCheckoutSession calls polar sdk with configured products", async () => {
+  const calls = [];
+  const adapter = createPolarAdapter({
+    productIds: ["prod_1"],
+    sdk: {
+      checkouts: {
+        async create(payload) {
+          calls.push(payload);
+          return { id: "chk_1", url: "https://polar.sh/checkout/chk_1" };
+        },
+      },
+    },
+  });
+
+  const checkout = await adapter.createCheckoutSession({
+    userId: "u1",
+    successUrl: "https://app/success",
+    returnUrl: "https://app/return",
+    metadata: { xartaudio_user_id: "u1", xartaudio_credits: "50" },
+  });
+
+  assert.equal(checkout.id, "chk_1");
+  assert.equal(checkout.url, "https://polar.sh/checkout/chk_1");
+  assert.equal(calls.length, 1);
+  assert.deepEqual(calls[0].products, ["prod_1"]);
+  assert.equal(calls[0].externalCustomerId, "u1");
+});