cheatsheets/sinon.md

title: Sinon

Spy

var fn = sinon.spy();
fn();
fn.calledOnce == true
fn.callCount == 1

Spy something

sinon.spy($, 'ajax')

Stub

var fn = sinon.stub().returns(42);
fn() == 42

fn.withArgs(42).returns(1);
fn.withArgs(43).throws("TypeError");
stub.returnsArg(0); // Return 1st argument
stub.callsArg(0);

Stub something

sinon.stub($, 'ajax');
$.ajax.calledWithMatch({ url: '/x' });
$.ajax.restore();

sinon.stub($, 'ajax', function() { return 'x' });

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([{ id: 1, text: "Provide examples", done: true }])
);

server.restore();

Fake XHR

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

Sandbox

beforeEach -> global.sinon = require('sinon').sandbox.create()
afterEach  -> global.sinon.restore()