/**
* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import assert from 'node:assert';
import crypto from 'node:crypto';
import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import {describe, it, afterEach, beforeEach} from 'node:test';
import * as persistence from '../../src/telemetry/persistence.js';
describe('FilePersistence', () => {
let tmpDir: string;
beforeEach(async () => {
tmpDir = path.join(
await fs.realpath(os.tmpdir()),
`telemetry-test-${crypto.randomUUID()}`,
);
await fs.mkdir(tmpDir, {recursive: true});
});
afterEach(async () => {
await fs.rm(tmpDir, {recursive: true, force: true});
});
describe('loadState', () => {
it('returns default state if file does not exist', async () => {
const filePersistence = new persistence.FilePersistence(tmpDir);
const state = await filePersistence.loadState();
assert.deepStrictEqual(state, {
lastActive: '',
});
});
it('returns stored state if file exists', async () => {
const expectedState = {
lastActive: '2023-01-01T00:00:00.000Z',
};
await fs.writeFile(
path.join(tmpDir, 'telemetry_state.json'),
JSON.stringify(expectedState),
);
const filePersistence = new persistence.FilePersistence(tmpDir);
const state = await filePersistence.loadState();
assert.deepStrictEqual(state, expectedState);
});
});
describe('saveState', () => {
it('saves state to file', async () => {
const state = {
lastActive: '2023-01-01T00:00:00.000Z',
};
const filePersistence = new persistence.FilePersistence(tmpDir);
await filePersistence.saveState(state);
const content = await fs.readFile(
path.join(tmpDir, 'telemetry_state.json'),
'utf-8',
);
assert.deepStrictEqual(JSON.parse(content), state);
});
});
});
