[rspec-users] need some advice on the best way to structure testable shared methods

[Patrick J. Collins]

> Use the described class:
> 
> shared_examples "a nameable thingie" do |klass|
>   describe "#build_name" do
>     it "it adds the collection of arguments to the base components and formats them for a form element name attribute" do
>       described_class.new(nil,nil).build_name(:lol, :lollerskates, :roflcopter).should == "lol[lollerskates][roflcopter]"
>     end
>   end
> end

But what happens if the classes do not have the same argument expectations,
such as:

class Foo

  include NameBuilder

  def initialize(arg1)
    ...
  end

end

class Bar

  include NameBuilder

  def initialize(arg1, arg2, arg3)
    ...
  end

end

...

In this case, "described_class.new(nil, nil)" is not going to work out very
well.

Patrick J. Collins
http://collinatorstudios.com