How to experiment with rspec from within irb

Question

For example, I want to say b = double("book") in irb and play with the result.

In irb if I say

require 'rspec'
b = double("book")

I get an error. Ideas?

Answer 1

You can play around with RSpec test doubles in irb by requiring "rspec/mocks/standalone":

$ irb
> require 'rspec/mocks/standalone'
> b = double("book")
  =>  #<RSpec::Mocks::Mock:0x3fd88d0157e8 @name="book">