rspec users - Aug 2008 - [bug] mock expectations fail when a subclass is instantiated

I took a look at the web site but did not see any issue/bug tracker,  
so I''m reporting this here.

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

On Sat, Aug 16, 2008 at 4:25 PM, Chuck Remes <cremes.devlist at mac.com>
wrote:
> I took a look at the web site but did not see any issue/bug tracker
http://rspec.lighthouseapp.com

I forwarded this there: http://rspec.lighthouseapp.com/projects/5645/tickets/496

Will respond in that ticket.

Cheers,
David
>so I''m
> reporting this here.
>
> 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
>
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