✨feature: First push to git

tests/state.test.ts

@@ -0,0 +1,25 @@
+import { mkdtemp, rm } from 'node:fs/promises';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import { afterEach, beforeEach, describe, expect, it } from 'vitest';
+import { StateStore } from '../src/state/state.js';
+
+let dir = '';
+
+beforeEach(async () => {
+  dir = await mkdtemp(join(tmpdir(), 'nlc-'));
+});
+
+afterEach(async () => {
+  await rm(dir, { force: true, recursive: true });
+});
+
+describe('state persistence', () => {
+  it('tracks processed messages incrementally', async () => {
+    const store = new StateStore(join(dir, 'state.json'));
+
+    expect(await store.isProcessed('msg-1')).toBe(false);
+    await store.markProcessed('msg-1');
+    expect(await store.isProcessed('msg-1')).toBe(true);
+  });
+});