[rspec-users] Cucumber - Ambiguous steps

David Chelimsky dchelimsky at gmail.com
Mon Sep 15 08:40:34 EDT 2008


On Mon, Sep 15, 2008 at 3:54 AM, Joseph Wilk <lists at ruby-forum.com> wrote:
>>>> Then /I should see "(.*)" in the page/ do |text|
>>
>> That should raise an AmbiguousStep error if you also have /I should
>> see "(.*)"/.
>
> Oops sorry, thanks for spotting that David.
>
> It seems that it would be good practice to use $ and ^ in all your
> regular expression steps in order to minimise surprise conflicts.
>
> You can still use non-regular expression steps in Cucumber:
>
>>Then "I should see '$value' in the page" do |value|
>
> This issue does make me think about the regular expressions to step
> matching.
>
> My intuition would be that if a regular expression did not consume all
> the tokens of a step string then it would not be a match for the step
> (even though it would be in the regular expression domain). What do
> people think?
>
> I've been unable to think of a good example where I would want only a
> partial match of a step. Throwing away the unmatched characters. Does
> anyone have good examples where they would?

I think you've got this right and exposed a bug. Wanna report it to
lighthouse and/or fix it?

Thanks,
David

>
> Joseph Wilk
> --
> http://www.joesniff.co.uk
>
>
> David Chelimsky wrote:
>> On Sun, Sep 14, 2008 at 9:13 AM, Joseph Wilk <lists at ruby-forum.com>
>> wrote:
>>>
>>>> Then /I should see "(.*)" in the page/ do |text|
>>
>> That should raise an AmbiguousStep error if you also have /I should
>> see "(.*)"/. What I've been doing is stuff like ...
>>
>>   Then /the list of (.*) should incude "(.*)"/
>>
>> ... in order to differentiate. I'll say that I do allow this to impose
>> html element IDs:
>>
>>   Then /the list of (.*) should incude "(.*)"/ do |list_of, text|
>>     list_id = list_of.downcase.replace(' ','-')
>>     response.should have_tag("ul##{list_id}") do
>>       with_tag("li",text)
>>     end
>>   end
>>
>> But this one step covers a lot of cases for me.
>>
>> Thoughts?
>>
>> David
>
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