JSpec: Robust BDD for both client and server JavaScript

JSpec from @visionmedia wants to be your BDD framework no matter where you run your JavaScript. JSpec supports not only JavaScript in the browser and popular client-side frameworks like jQuery, it also supports server-side JavaScript including Rhino and Node.js.

From the README specs may be written using JSpec grammar:

describe 'ShoppingCart'
  before_each
    cart = new ShoppingCart
  end

  describe 'addProducts'
    it 'should add several products'
      cart.addProduct('cookie')
      cart.addProduct('icecream')
      cart.should.have 2, 'products'
    end
  end

  describe 'checkout'
    it 'should throw an error when checking out with no products'
      -{ cart.clear().checkout() }.should.throw_error EmptyCart
    end
  end
end

or in pure JavaScript:

JSpec.describe('ShoppingCart', function(){
  before_each(function{
    cart = new ShoppingCart
  })

  describe('addProducts', function(){
    it ('should add several products', function(){
      cart.addProducts('cookie')
      cart.addProducts('icecream')
      expect(cart).to(have, 2, 'products')
    })
  })

  describe('checkout', function(){
    it ('should throw an error when checking out with no products', function(){
      expect(function(){ cart.clear().checkout() }).to(throw_error, EmptyCart)
    })
  })
})

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