Testing Puts

gistfile1.txt

class MyClass
  def initialize(word)
    @word = word
  end
  def putter
    puts @word
  end
end

describe "MyClass" do
  it "should put 'foo'" do
    myobj = MyClass.new('foo')
    myobj.should_receive(:puts).with('foo')
    myobj.putter
  end
end

Notably, puts is not mixed into ruby 1.9's BasicObject, so if you try to do this:

class MyClass < BasicObject
  def putter
    puts 'foo'
  end
end

MyClass.new.putter

You'll get:

NoMethodError: undefined method `puts' for #<MyClass:0x00000100cdfae0>
        from (irb):3:in `putter'
        from (irb):6
        from /Users/Roberts/.rvm/rubies/ruby-1.9.3-p125-perf/bin/irb:16:in `<main>'

Which is kinda confusing, till you remember puts is just a method on your object, and BasicObject is a very bare object so has no puts.