[rspec-devel] [ rspec-Feature Requests-12985 ] with_block_which_returns(val)

[noreply at rubyforge.org]

Feature Requests item #12985, was opened at 2007-08-10 23:25
You can respond by visiting: 
http://rubyforge.org/tracker/?func=detail&atid=3152&aid=12985&group_id=797

Category: None
Group: None
Status: Open
Priority: 3
Submitted By: Scott Taylor (smtlaissezfaire)
Assigned to: Nobody (None)
Summary: with_block_which_returns(val)

Initial Comment:

>From the mailing list:

(me):
Maybe a better example would be in place.  Consider the following
from the Autotest plugin:

Autotest.add_discovery do
   "rspec" if File.exist?('spec')
end

How would you go about testing this?

It's easy enough to test that Autotest receives the method
add_discovery.  But how would you deal with the block?



(David:)
OK - now I'm starting to see. Concrete examples are always helpful.

I guess there's no mocking framework right now that would solve that
for you. What spec do you *wish* you could write?

----------------------

Maybe something like this:

describe Autotest::Rspec "discovery" do
  it "should take a block returns 'rspec' if the file exists" do
    File.stub!(:exists?).and_return true
    Autotest.should_receive(:add_discovery).with_block_which_returns "rspec"
  end
  
  it "should take a block which returns nil if the file does not exist" do
    File.stub!(:exists?).and_return false
    Autotest.should_receive(:add_discovery).with_block_which_returns nil
  end
end


or maybe something like this:

Autotest.should_receive(:add_discovery).with(:val1, :val2).and_block_which_returns "rspec"

I'm open to a less verbose/more terse syntax.


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