serverless-artillery/lib/lambda/node_modules/arrivals/test/index.js

A serverless performance testing tool. `serverless` + `artillery` = crush. a.k.a. Orbital Laziers [sic]

'use strict';

var arrivals = require('../lib');
var tape = require('tape');

tape('Can create a Poisson process', function(t) {
  var count = 0;
  var p = arrivals.poisson.process(400);
  p.on('arrival', function() {
    t.ok(true, '  got arrival event ' + (++count));
  });
  p.once('finished', function() {
    t.ok(true, '  got finished event');
  });

  t.ok(p, 'Process created');
  p.start();
  t.ok(true, 'Process started');
  setTimeout(function() {
    p.stop();
    t.end();
  }, 2800);
});

tape('Can create a Poisson process with fixed duration', function(t) {
  var count = 0;
  var p = arrivals.poisson.process(400, 2800);
  p.on('arrival', function() {
    t.ok(true, '  got arrival event ' + (++count));
  });
  p.once('finished', function() {
    t.ok(true, '  got finished event');
    t.end();
  });

  t.ok(p, 'Process created');
  p.start();
  t.ok(true, 'Process started');
});

tape('Can create a uniform process', function(t) {
  var count = 0;
  var p = arrivals.uniform.process(400);
  p.on('arrival', function() {
    t.ok(true, '  got arrival event ' + (++count));
  });
  p.once('finished', function() {
    t.ok(true, '  got finished event');
  });

  t.ok(p, 'Process created');
  p.start();
  t.ok(true, 'Process started');
  setTimeout(function() {
    p.stop();
    t.assert(count === 6, `Correct number of arrivals - got ${count} - 1`);
    t.end();
  }, 2700);
});

tape('Can create a uniform process with fixed duration', function(t) {
  var count = 0;
  var p = arrivals.uniform.process(1000/340, 1000);
  p.on('arrival', function() {
    t.ok(true, '  got arrival event ' + (++count));
  });
  p.once('finished', function() {
    t.ok(true, '  got finished event');
    t.assert(count === 340, `Correct number of arrivals - got ${count}`);
    t.end();
  });

  t.ok(p, 'Process created');
  p.start();
  t.ok(true, 'Process started');
});

tape('Expect number of arrival events get emitted', function(t) {
  var arrivalCount = 30;
  var duration = 1000;
  var count = 0;
  var p = arrivals.uniform.process(duration / arrivalCount, duration);
  p.on('arrival', function() {
    count++;
  });
  p.once('finished', function () {
    console.log(`count = ${count}, arrivalCount = ${arrivalCount}`);
    t.assert(count === arrivalCount, 'Got expected number of arrivals');
    t.end();
  });
  p.start();
});