Sinon-chai cheatsheet

var sinon = require('sinon');
require('chai').use(require('sinon-chai'));

expect(spy).called
expect(spy).calledOnce
expect(spy).calledTwice
expect(spy).calledThrice
expect(spy).calledBefore
expect(spy).calledAfter
expect(spy).calledWithNew
expect(spy).alwaysCalledWithNew
expect(spy).calledOn
expect(spy).alwaysCalledOn
expect(spy).calledWith
expect(spy).alwaysCalledWith
expect(spy).calledWithExactly
expect(spy).alwaysCalledWithExactly
expect(spy).calledWithMatch
expect(spy).alwaysCalledWithMatch
expect(spy).returned
expect(spy).alwaysReturned
expect(spy).threw
expect(spy).alwaysThrew

spy.should.have.been.called
spy.should.have.been.calledOnce
spy.should.have.been.calledTwice
spy.should.have.been.calledThrice
spy1.should.have.been.calledBefore(spy2)
spy1.should.have.been.calledAfter(spy2)
spy.should.have.been.calledWithNew
spy.should.always.have.been.calledWithNew
spy.should.have.been.calledOn(context)
spy.should.always.have.been.calledOn(context)
spy.should.have.been.calledWith(...args)
spy.should.always.have.been.calledWith(...args)
spy.should.always.have.been.calledWithExactly(...args)
spy.should.always.have.been.calledWithExactly(...args)
spy.should.have.been.calledWithMatch(...args)
spy.should.always.have.been.calledWithMatch(...args)
spy.should.have.returned(returnVal)
spy.should.have.always.returned(returnVal)
spy.should.have.thrown(errorObjOrErrorTypeStringOrNothing)
spy.should.have.always.thrown(errorObjOrErrorTypeStringOrNothing)