Refactor CLI and Twilio modules; add helper tests and comments

src/twilio/monitor.test.ts

@@ -0,0 +1,34 @@
+import { describe, expect, it, vi } from "vitest";
+
+import { monitorTwilio } from "./monitor.js";
+
+describe("monitorTwilio", () => {
+	it("processes inbound messages once with injected deps", async () => {
+		const listRecentMessages = vi.fn().mockResolvedValue([
+			{
+				sid: "m1",
+				direction: "inbound",
+				dateCreated: new Date(),
+				from: "+1",
+				to: "+2",
+				body: "hi",
+				errorCode: null,
+				errorMessage: null,
+				status: null,
+			},
+		]);
+		const autoReplyIfConfigured = vi.fn().mockResolvedValue(undefined);
+		const readEnv = vi.fn(() => ({ accountSid: "AC", whatsappFrom: "whatsapp:+1", auth: { accountSid: "AC", authToken: "t" } }));
+		const createClient = vi.fn(() => ({ messages: { create: vi.fn() } } as never));
+		const sleep = vi.fn().mockResolvedValue(undefined);
+
+		await monitorTwilio(0, 0, {
+			deps: { autoReplyIfConfigured, listRecentMessages, readEnv, createClient, sleep },
+			maxIterations: 1,
+		});
+
+		expect(listRecentMessages).toHaveBeenCalledTimes(1);
+		expect(autoReplyIfConfigured).toHaveBeenCalledTimes(1);
+	});
+});
+