JavaScript, Sinon.js and Chai.js Regexp literal equality Madness

madness_test.coffee

chai = require 'chai'
sinon = require 'sinon'
chai.use require 'sinon-chai'

# Yup, I'm mixing style. Deal with it.
expect = chai.expect
assert = chai.assert

describe 'regexp equality', ->

  describe 'using pure javascript', ->

    # Irksome, but correct
    it "should be false when comparing the same literals", ->
      assert.notOk(/foo/ == /foo/)

  describe 'sinon', ->

    # Fails
    it ".deepEqual with different literals", ->
      assert.notOk(sinon.deepEqual(/foo/, /bar/))

    it ".deepEqual with same literals", ->
      assert.ok(sinon.deepEqual(/foo/, /foo/))

  describe 'chai', ->

    it ".notEqual with different literals", ->
      assert.notEqual(/foo/, /bar/)

    # Fails
    it ".equal with same literals", ->
      assert.equal(/foo/, /foo/)
  
    it ".deepEqual with different literals", ->
      assert.notDeepEqual(/foo/, /bar/)

    it ".deepEqual with same literals", ->
      assert.deepEqual(/foo/, /foo/)