initial commit

test/notifier.test.js

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+"use strict";
+
+const test = require("node:test");
+const assert = require("node:assert/strict");
+const { TelegramNotifier, createNotifier } = require("../src/notifier");
+
+const sampleEvent = {
+  watchId: "watch-1",
+  rawInput: "인천->마드리드",
+  eventType: "target_price",
+  threshold: 1300000,
+  previousBestPrice: 1320000,
+  currentBestPrice: 1295000,
+  currency: "KRW",
+  bestOffer: {
+    provider: "mock-ota-b",
+  },
+  observedAt: "2026-02-19T00:00:00.000Z",
+};
+
+test("createNotifier selects telegram channel and sends formatted message", async () => {
+  const requests = [];
+  const notifier = createNotifier({
+    channel: "telegram",
+    telegramBotToken: "123:abc",
+    telegramChatId: "999",
+    fetch: async (url, init) => {
+      requests.push({ url, init });
+      return {
+        ok: true,
+        status: 200,
+        async text() {
+          return JSON.stringify({ ok: true });
+        },
+      };
+    },
+  });
+
+  await notifier.notify(sampleEvent);
+
+  assert.equal(requests.length, 1);
+  assert.equal(requests[0].url, "https://api.telegram.org/bot123:abc/sendMessage");
+
+  const body = JSON.parse(requests[0].init.body);
+  assert.equal(body.chat_id, "999");
+  assert.equal(body.disable_web_page_preview, true);
+  assert.equal(typeof body.text, "string");
+  assert.match(body.text, /Current best: 1,295,000 KRW/);
+  assert.match(body.text, /Target threshold: 1,300,000 KRW/);
+});
+
+test("createNotifier supports webhook channel", async () => {
+  const requests = [];
+  const notifier = createNotifier({
+    channel: "webhook",
+    webhookUrl: "https://example.com/hook",
+    fetch: async (url, init) => {
+      requests.push({ url, init });
+      return {
+        ok: true,
+        status: 200,
+        async text() {
+          return "";
+        },
+      };
+    },
+  });
+
+  await notifier.notify(sampleEvent);
+
+  assert.equal(requests.length, 1);
+  assert.equal(requests[0].url, "https://example.com/hook");
+  assert.deepEqual(JSON.parse(requests[0].init.body), sampleEvent);
+});
+
+test("createNotifier rejects unsupported channel", () => {
+  assert.throws(() => createNotifier({ channel: "email" }), /Unsupported NOTIFY_CHANNEL/);
+});
+
+test("telegram notifier surfaces API errors", async () => {
+  const notifier = new TelegramNotifier({
+    botToken: "token",
+    chatId: "chat",
+    fetch: async () => ({
+      ok: false,
+      status: 400,
+      async text() {
+        return JSON.stringify({ description: "Bad Request: chat not found" });
+      },
+    }),
+  });
+
+  await assert.rejects(
+    async () => notifier.notify(sampleEvent),
+    /Telegram notification failed \(400\): Bad Request: chat not found/
+  );
+});