[rspec-users] Debugging trick.

Scott Taylor mailing_lists at railsnewbie.com
Sat Apr 19 13:03:46 EDT 2008


On Apr 19, 2008, at 12:43 PM, Brian Takita wrote:

> On Fri, Apr 18, 2008 at 7:13 PM, Scott Taylor
> <mailing_lists at railsnewbie.com> wrote:
>>
>> On Apr 18, 2008, at 5:14 PM, Rick DeNatale wrote:
>>
>>> Some have probably already discovered this but I've been working
>>> through some ui stories, using the rails integration test stuff.
>>>
>>> I had a story where one very used step was failing in one place.   
>>> The
>>> failing expectation looked like this:
>>>
>>>      response.should have_tag("tr.group_info_row td",group_title)
>>>
>>> I wanted to look at the response, but only for the case which was
>>> failing, so I changed this to:
>>>
>>>     debugger unless have_tag("tr.group_info_row
>>> td",group_title).matches?(response)
>>>     response.should have_tag("tr.group_info_row td",group_title)
>>>
>>> And rdebug broke right before the expectation would have thrown its
>>> exception, and I could see the problem, which was an earlier step
>>> which had checked that the request had redirected without following
>>> the redirect.
>>
>> Yeah - I use this all the time.   I have a textmate snippet called
>> debug(tab) which inserts the following:
>>
>> require "rubygems"; require "ruby-debug"; debugger
>>
>> This allows me to use it in all sort of contexts - migrations,  
>> outside
>> of rails projects, in failing test cases, etc.
> +1 Its awesome.
>
> I also use intellij Idea, which has a console. The console does IO
> with the debugger.
> Whats cool is I can click or use a shortcut to jump to the file + line
> link that the debugger gives.

Yeah - I often use ruby-debug's mate command, which will open up the  
file in textmate on the line and file
you're currently on (it's incredibly convenient).

>
>>
>> It should be noted that in other languages (like Smalltalk and lisp)
>> the debugger pops up automatically when a test case fails.
>>
>> I don't know why this technique has never picked up and become  
>> popular.
>>
>> Scott
>>
>>
>>
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