pustovitDmytro / myrmidon

import path from 'path';

import { assert } from 'chai';

import { load, sleep, testsRootFolder } from '../../Test';

const benchmarkPath = 'benchmark.js';

const polyfillPath = path.join(testsRootFolder, 'polyfills/performance.polyfill.js');

const hrtime = process.hrtime;

const performance = global.performance;

let getBenchmark;

let  startBenchmark;

suite('Performance benchmarks #browser');

before(function () {

    process.hrtime = 0;

    load(polyfillPath);

    const fallback = load(benchmarkPath, true);

    getBenchmark = fallback.getBenchmark;

    startBenchmark = fallback.startBenchmark;

});

test('Positive: min measurable time', function () {

    const time = startBenchmark();

    const benchmark = getBenchmark(time);

    assert.isString(benchmark);

    assert.isNumber(+benchmark);

});

test('Positive: measure time', async function () {

    const time = startBenchmark();

    await sleep(20);

    const benchmark = getBenchmark(time);

    assert.isString(benchmark);

    assert.isAtLeast(+benchmark, 19);

});

after(async function () {

    global.performance = performance;

    process.hrtime = hrtime;

});