[rspec-users] Cucumber - Ambiguous steps

Joseph Wilk
Mon, 15 Sep 2008 08:54:17 -0000

>>> 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?

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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