mirror of
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143 lines
4.0 KiB
JavaScript
143 lines
4.0 KiB
JavaScript
const loadtest = require('loadtest');
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const chalk = require('chalk');
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const trunc = num => +num.toFixed(1);
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/**
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* Example invocations:
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*
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* npm run loadtest -- --weight=heavy
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* npm run loadtest -- --weight=heavy --verbose
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* npm run loadtest -- --weight=single --verbose
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* npm run loadtest -- --weight=medium
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*/
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/**
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* Command line arguments like --weight=heavy and --verbose use this object
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* If you are providing _alternative_ configs, use --weight
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* e.g. add --weight=ultra then add commandlineOptions.ultra={}
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* --verbose can be combied with any weight.
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*/
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const commandlineOptions = {
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single: {
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concurrency: 1,
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requestsPerSecond: 1,
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maxSeconds: 5,
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maxRequests: 1,
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},
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// Heavy can saturate CPU which leads to requests stalling depending on machine
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// Keep an eye if --verbose logs pause, or if node CPU in top is > 100.
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// https://github.com/alexfernandez/loadtest#usage-donts
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heavy: {
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concurrency: 10,
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requestsPerSecond: 200,
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maxSeconds: 60,
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},
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// Throttled requests should not max out CPU,
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medium: {
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concurrency: 3,
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requestsPerSecond: 5,
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maxSeconds: 60,
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},
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verbose: { statusCallback },
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};
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const options = {
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url: 'http://localhost:3000',
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method: 'POST',
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concurrency: 5,
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requestsPerSecond: 5,
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maxSeconds: 5,
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requestGenerator: (params, options, client, callback) => {
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const message = JSON.stringify(mockPageView());
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options.headers['Content-Length'] = message.length;
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options.headers['Content-Type'] = 'application/json';
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options.body = message;
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options.path = '/api/collect';
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const request = client(options, callback);
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request.write(message);
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return request;
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},
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};
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function getArgument() {
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const weight = process.argv[2] && process.argv[2].replace('--weight=', '');
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const verbose = process.argv.includes('--verbose') && 'verbose';
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return [weight, verbose];
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}
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// Patch in all command line arguments over options object
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// Must do this prior to calling `loadTest()`
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getArgument().map(arg => Object.assign(options, commandlineOptions[arg]));
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loadtest.loadTest(options, (error, results) => {
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if (error) {
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return console.error(chalk.redBright('Got an error: %s', error));
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}
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console.log(chalk.bold(chalk.yellow('\n--------\n')));
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console.log(chalk.yellowBright('Loadtests complete:'), chalk.greenBright('success'), '\n');
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prettyLogItem('Total Requests:', results.totalRequests);
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prettyLogItem('Total Errors:', results.totalErrors);
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prettyLogItem(
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'Latency(mean/min/max)',
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trunc(results.meanLatencyMs),
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'/',
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trunc(results.maxLatencyMs),
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'/',
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trunc(results.minLatencyMs),
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);
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if (results.totalErrors) {
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console.log(chalk.redBright('*'), chalk.red('Total Errors:'), results.totalErrors);
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}
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if (results.errorCodes && Object.keys(results.errorCodes).length) {
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console.log(chalk.redBright('*'), chalk.red('Error Codes:'), results.errorCodes);
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}
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});
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/**
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* Create a new object for each request. Note, we could randomize values here if desired.
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*
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* TODO: Need a better way of passing in websiteId, hostname, URL.
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*
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* @param {object} payload pageview payload same as sent via tracker
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*/
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function mockPageView(
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payload = {
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website: 'fcd4c7e3-ed76-439c-9121-3a0f102df126',
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hostname: 'localhost',
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screen: '1680x1050',
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url: '/LOADTESTING',
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referrer: '/REFERRER',
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},
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) {
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return {
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type: 'pageview',
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payload,
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};
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}
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// If you pass in --verbose, this function is called
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function statusCallback(error, result, latency) {
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if (error) {
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return console.error(chalk.redBright(error));
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}
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console.log(
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chalk.yellowBright(`\n## req #${result.requestIndex + 1} of ${latency.totalRequests}`),
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);
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prettyLogItem('Request elapsed milliseconds:', trunc(result.requestElapsed));
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prettyLogItem(
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'Latency(mean/max/min):',
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trunc(latency.meanLatencyMs),
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'/',
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trunc(latency.maxLatencyMs),
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'/',
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trunc(latency.minLatencyMs),
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);
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}
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function prettyLogItem(label, ...args) {
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console.log(chalk.redBright('*'), chalk.green(label), ...args);
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}
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