// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

'use strict';

import { assert } from 'chai';

import * as sinon from 'sinon';

import { InMemoryCache } from '../../../client/common/utils/cacheUtils';

suite('Common Utils - CacheUtils', () => {

suite('InMemory Cache', () => {

let clock: sinon.SinonFakeTimers;

setup(() => {

clock = sinon.useFakeTimers();

});

teardown(() => clock.restore());

test('Cached item should exist', () => {

const cache = new InMemoryCache(5_000);

cache.data = 'Hello World';

assert.equal(cache.data, 'Hello World');

assert.isOk(cache.hasData);

});

test('Cached item can be updated and should exist', () => {

const cache = new InMemoryCache(5_000);

cache.data = 'Hello World';

assert.equal(cache.data, 'Hello World');

assert.isOk(cache.hasData);

cache.data = 'Bye';

assert.equal(cache.data, 'Bye');

assert.isOk(cache.hasData);

});

test('Cached item should not exist after time expires', () => {

const cache = new InMemoryCache(5_000);

cache.data = 'Hello World';

assert.equal(cache.data, 'Hello World');

assert.isTrue(cache.hasData);

// Should not expire after 4.999s.

clock.tick(4_999);

assert.equal(cache.data, 'Hello World');

assert.isTrue(cache.hasData);

// Should expire after 5s (previous 4999ms + 1ms).

clock.tick(1);

assert.equal(cache.data, undefined);

assert.isFalse(cache.hasData);

});

});

});