Sharing: dont_repeat_yourself plugin custom RSpec matcher

I wrote a Rails plugin which uses simian to look for duplicates lines in
your
code and reports in html format, Textmate or Netbeans.

I wrote it using RSpec and I have included a RSpec custom matcher:
it { rails_application.
with_threshold_of_duplicate_lines(4).
should be_DRY }

If you use Autotest, your specs will fail the next time you do a nasty
copy-paste !!!

More details in http://21croissants.blogspot.com/2008/03/dry.html

Feedback and patches (with specs!) welcome :wink:

Jean-Michel

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On 29 Apr 2008, at 18:25, 21croissants wrote:

copy-paste !!!

More details in http://21croissants.blogspot.com/2008/03/dry.html

Feedback and patches (with specs!) welcome :wink:

Sounds good! Any reason why you wrote it as a Rails plugin though?
This could be used for any ruby project… except mine of course, I
never copy and paste, honest :o)

Ashley


http://www.patchspace.co.uk/

On 1 May 2008, at 16:00, 21croissants wrote:

You’re right and one of my next action will be to create a gem so it
can be
use in any ruby project, I will keep the Rails plugin of course.

Cool, be sure to post here when you’ve gemified it :slight_smile:

It will generate the report (HTML, Textmate) in a file called
DRY_report.html at the root folder of your rails app.

I reckon this is not very handy - you need to create a Rails project
and
install the plugin - but it will soon improve!

As a spoilt Rails developer I demand that everything written in Ruby
works magically whatever I am doing :o)

This reminds me a bit of a time when I created a Rails project just to
use AR migrations. I think I’ll wait for now until there is a gem
version.

Just out of curiosity, have you run your DRY reporter against the
Rails code itself? Might be interesting to see the results…

Ashley


http://www.patchspace.co.uk/

Ashley, I ran the DRY reporter on Rails 2.0.2 and you’ll find the
results on
http://www.21croissants.com/files/rails_2_0_2_DRY_report.html

I have done a lot of refactoring lately (but did not changed the
external
API) and will commit my code soon …

Ashley M.-4 wrote:

Just out of curiosity, have you run your DRY reporter against the
Rails code itself? Might be interesting to see the results…

Ashley


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thanks for your feedback Ashley.

You’re right and one of my next action will be to create a gem so it can
be
use in any ruby project, I will keep the Rails plugin of course.

At the moment, you can write :

require … specific your location … +
‘/lib/dont_repeat_yourself/reporter’

dry_reporter = DontRepeatYourself::Reporter.new
dry_reporter.configure_simian_for_ruby_project("/home/jeanmichel/ruby/projects/dry-report/rails_plugin/vendor/plugins/dont_repeat_yourself")
dry_reporter.html_rails_report

It will generate the report (HTML, Textmate) in a file called
DRY_report.html at the root folder of your rails app.

I reckon this is not very handy - you need to create a Rails project and
install the plugin - but it will soon improve!

JM

Ashley M.-4 wrote:

Sounds good! Any reason why you wrote it as a Rails plugin though?
This could be used for any ruby project… except mine of course, I
never copy and paste, honest :o)

Ashley


View this message in context:
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Sent from the rspec-users mailing list archive at Nabble.com.

On 19 May 2008, at 18:21, 21croissants wrote:

Ashley, I ran the DRY reporter on Rails 2.0.2 and you’ll find the
results on
http://www.21croissants.com/files/rails_2_0_2_DRY_report.html

Wow, that’s really interesting. Some things are trivial mini-methods,
eg “def to_param; to_s; end”. But there are some huge chunks of
complex logic in there!

I wonder how so much duplication got in there, and if some of it is
justified?

I have done a lot of refactoring lately (but did not changed the
external
API) and will commit my code soon …

Cool. Is it still a Rails plugin or can you run it on standalone
code? It’d make a great gem with a binary.

Be sure to post when you commit!

Ashley


http://www.patchspace.co.uk/

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