Sinon cheatsheet

Creating spies

fn = sinon.spy()
fn()

fn.calledOnce == true
fn.callCount == 1

Spying/stubbing

sinon.spy($, 'ajax')

$.ajax();
$.ajax.calledOnce == true

sinon.stub($, 'ajax', function () { ... }) // function optional

$.ajax.calledWithMatch({ url: '/x' })
$.ajax.restore()

Spy/stub properties

spy
  .args        //=> [ [..], [..] ] one per call
  .thisValues
  .returnValues

  .called      //=> true
  .notCalled
  .callCount
  .calledOnce
  .calledTwice
  .calledThrice

  .getCalls()   //=> Array
  .getCall(0)
  .firstCall

Anonymous stub

stub = sinon.stub().returns(42)
stub() == 42

stub
  .withArgs(42).returns(1)
  .withArgs(43).throws("TypeError")

stub
  .returns(1)
  .throws("TypeError")
  .returnsArg(0) // Return 1st argument
  .callsArg(0)

Fake date

sinon.useFakeTimers(+new Date(2011,9,1));

Fake server

server = sinon.fakeServer.create()

$.get('/file.json', ...)
server.requests[0].respond(
  200,
  { 'Content-Type': 'application/json' },
  JSON.stringify({ hello: 'world' })
)

server.restore()

Fake XHR

xhr = sinon.useFakeXMLHttpRequest()
xhr.restore()

Sandbox

beforeEach(function() {
  global.sinon = require('sinon').sandbox.create()
})

afterEach(function() {
  global.sinon.restore()
})