How to test puts in rspec

Question

I want to do is run ruby sayhello.rb on the command line, then receive Hello from Rspec.

I\'ve got that with this:

class Hello
         


        

Answer 1

You can solve this using Rails' active_support library, which adds a capture method:

require 'active_support/core_ext/kernel/reporting'
require_relative 'sayhello'

describe Hello do
  it "says 'Hello from RSpec' when ran" do
    output = capture(:stdout) do
      hi = Hello.new
      hi.speak
    end
    expect(output).to include 'Hello from RSpec'
  end
end