chai = require “chai” chai.use(require “chai-increasing”) {assert,expect} = chai Bluebird = require “bluebird”

now = require “../”

getUptime = -> process.uptime() * 1e3

describe “now”, ->

it "reported time differs at most 1ms from a freshly reported uptime", ->
  assert.isAtMost Math.abs(now()-getUptime()), 1

it "two subsequent calls return an increasing number", ->
  assert.isBelow now(), now()

it "has less than 10 microseconds overhead", ->
  assert.isBelow Math.abs(now() - now()), 0.010

it "can be called 1 million times in under 1 second (averaging under 1 microsecond per call)", ->
  @timeout 1000
  now() for [0...1e6]
  undefined

it "for 10,000 numbers, number n is never bigger than number n-1", ->
  stamps = (now() for [1...10000])
  expect(stamps).to.be.increasing

it "shows that at least 0.2 ms has passed after a timeout of 1 ms", ->
  earlier = now()
  Bluebird.resolve().delay(1).then -> assert.isAbove (now()-earlier), 0.2

it "shows that at most 3 ms has passed after a timeout of 1 ms", ->
  earlier = now()
  Bluebird.resolve().delay(1).then -> assert.isBelow (now()-earlier), 3

it "shows that at least 190ms ms has passed after a timeout of 200ms", ->
  earlier = now()
  Bluebird.resolve().delay(200).then -> assert.isAbove (now()-earlier), 190

it "shows that at most 220 ms has passed after a timeout of 200ms", ->
  earlier = now()
  Bluebird.resolve().delay(200).then -> assert.isBelow (now()-earlier), 220