Test for warnings using RSpec

Question

Is it somehow possible to test warnings i Ruby using RSpec?

Like this:

class MyClass
  def initialize
    warn \"Something is wrong\"
  end
end

it \         


        

Answer 1

There is a good article with custom expectation which solves exactly your problem: http://greyblake.com/blog/2012/12/14/custom-expectations-with-rspec/

So it would like:

expect { MyClass.new }.to write("Something is wrong").to(:error)

Base on that article you can create you own expectation to use it like this:

expect { MyClass.new }.to warn("Something is wrong")