rspec

From: Chuck Remes cremes.devlist@mac.com
Date: Sat, Aug 16, 2008 at 4:25 PM
Subject: [rspec-users] [bug] mock expectations fail when a subclass is instantiated
To: rspec-users rspec-users@rubyforge.org

The mock framework fails to differentiate between messages sent to a parent class versus a subclass, so some of my expectations fail when I assert some expectation on a parent. Here's code to show it:

cremes$ cat c.rb
class A
end

class B < A
end

class C
 def foo
   a = A.new
   b = B.new
 end
end


cremes$ cat c_spec.rb
require 'rubygems'
require 'spec'
require 'c'

describe C, "mock" do
 it "should incorrectly pick up message sent to parent class as a subclass err" do
   A.should_receive(:new).once
   c = C.new
   c.foo
 end
end


cremes$ spec c_spec.rb
F

1)
NoMethodError in 'C mock should incorrectly pick up message sent to parent class as a subclass err'
undefined method `new' for B:Class
./c.rb:10:in `foo'
./c_spec.rb:9:

Finished in 0.006664 seconds

1 example, 1 failure

If I capture the exception thrown here, it is at lib/spec/mocks/proxy.rb line 75. I'd provide a patch if I knew how to fix it! :)

cr