node/test/wpt/test-user-timing.js at 4d1ab3ed8d353c01e186fb3559852f634b933f0f · nodejs/node

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'use strict';

const assert = require('assert');

const { basename } = require('path');

const { WPTRunner } = require('../common/wpt');

const runner = new WPTRunner('user-timing');

runner.pretendGlobalThisAs('Window');

runner.setScriptModifier((script) => {

if (basename(script.filename) !== 'mark.any.js') return;

// A scheduling pause between mark() and now() can exceed any fixed

// tolerance. Check that the mark falls between the surrounding clock

// readings instead, leaving the upstream fixture unchanged.

// https://github.com/nodejs/node/issues/40449

function replace(from, to) {

assert(script.code.includes(from), `Unexpected contents of ${script.filename}`);

script.code = script.code.replaceAll(from, to);

}

replace('var expectedTimes = new Array();',

'var beforeTimes = [];\nvar expectedTimes = new Array();');

replace('self.performance.mark("mark");',

'beforeTimes.push(self.performance.now());\n self.performance.mark("mark");');

replace('assert_approx_equals(entries[index].startTime, expectedTimes[index], testThreshold);',

'assert_between_inclusive(entries[index].startTime, beforeTimes[index], expectedTimes[index]);');

});

runner.runJsTests();