sinon-chai.md

   1 ---
   2 title: Sinon-chai
   3 category: JavaScript libraries
   4 layout: default-ad
   5 ---
   6
   7   * [Sinon-chai](https://github.com/domenic/sinon-chai)
   8
   9
  10 ### Initialization
  11
  12 ```js
  13 var sinon = require('sinon');
  14 require('chai').use(require('sinon-chai'));
  15 ```
  16
  17 ### Assert
  18
  19     expect(spy).called
  20     expect(spy).calledOnce
  21     expect(spy).calledTwice
  22     expect(spy).calledThrice
  23     expect(spy).calledBefore
  24     expect(spy).calledAfter
  25     expect(spy).calledWithNew
  26     expect(spy).alwaysCalledWithNew
  27     expect(spy).calledOn
  28     expect(spy).alwaysCalledOn
  29     expect(spy).calledWith
  30     expect(spy).alwaysCalledWith
  31     expect(spy).calledWithExactly
  32     expect(spy).alwaysCalledWithExactly
  33     expect(spy).calledWithMatch
  34     expect(spy).alwaysCalledWithMatch
  35     expect(spy).returned
  36     expect(spy).alwaysReturned
  37     expect(spy).threw
  38     expect(spy).alwaysThrew
  39
  40 ### Should
  41
  42     spy.should.have.been.called
  43     spy.should.have.been.calledOnce
  44     spy.should.have.been.calledTwice
  45     spy.should.have.been.calledThrice
  46     spy1.should.have.been.calledBefore(spy2)
  47     spy1.should.have.been.calledAfter(spy2)
  48     spy.should.have.been.calledWithNew
  49     spy.should.always.have.been.calledWithNew
  50     spy.should.have.been.calledOn(context)
  51     spy.should.always.have.been.calledOn(context)
  52     spy.should.have.been.calledWith(...args)
  53     spy.should.always.have.been.calledWith(...args)
  54     spy.should.always.have.been.calledWithExactly(...args)
  55     spy.should.always.have.been.calledWithExactly(...args)
  56     spy.should.have.been.calledWithMatch(...args)
  57     spy.should.always.have.been.calledWithMatch(...args)
  58     spy.should.have.returned(returnVal)
  59     spy.should.have.always.returned(returnVal)
  60     spy.should.have.thrown(errorObjOrErrorTypeStringOrNothing)
  61     spy.should.have.always.thrown(errorObjOrErrorTypeStringOrNothing)