How do I stub things in MiniTest?

Question

Within my test I want to stub a canned response for any instance of a class.

It might look like something like:

Book.stubs(:title).any_instance().ret         


        

Answer 1

You cannot stub all instances of a class, but you can stub any instance method of a given object like this:

require "minitest/mock"

book = Book.new
book.stub(:title, 'War and Peace') do
  assert_equal 'War and Peace', book.title
end