√477

_ [rails] Testing behavior of ApplicationController with Rails3 and test-unit

There is a great article for RSpec. Here is how to do it with test-unit.

• http://pivotallabs.com/users/jdean/blog/articles/1370-adding-routes-for-tests-specs-with-rails-3

1. Create test/functional/application_controller_test.rb

2. Define example controller

class FooController < ApplicationController
  def exmaple
    # ...
  end
end

3. Define test case for this

class FooControllerTest < ActionController::TestCase

4. Define routes in setup (otherwise you will get 'No route matches')

  def setup
    Rails.applicaiton.routes.draw do
      get "/foo" => "foo#example"
    end
  end

5. Reload routes in teardown (otherwise all your other tests will fail)

  def teardown
    Rails.application.reload_routes!
  end

6. Write test

  test "foo" do
    # ...
    get :exmaple
  end

7. That's all!

end

_ [ruby] Coding projects introduced in RubyConf AR/UY Lightning Talks

Here is a list of interesting projects introduced in Lightning Talks on RubyConf Argentina and RubyConf Uruguay 2011. Let me know if something is missing.

From RubyConf Argentina:

• AudioVerb
  • "Learn English with hundreds of thousands of sentences with audio, transcriptions and translations."
• coco-debugger
  • Ruby debugger GUI for Mac
• MacRuby
  • "MacRuby is an implementation of Ruby 1.9 directly on top of Mac OS X core technologies"
• Cuba
  • Micro web app framework for Ruby
  • Used in redis.io (github)
• Chef Surfing
  • "Chef Surfing connects local chefs to hungry customers."
• dom-perignon
  • Example of jquery, knockout and angular
  • http://dom-perignon.heroku.com/
• crystal
  • "Crystal is a programming language that compiles to native code. It has a syntax strongly inspired by Ruby"
• Cacique
  • "Cacique is a GPL automation tool easy to use, powerful, collaborative and free!"
• OpenData
  • Slides
  • Screenshot 1 2 3 4

From RubyConf Uruguay:

• Galia
  • Gesture controlled gallery (powered by Kinect)
  • https://github.com/outbox/galia
• OpenData
  • http://www.google.com/publicdata/home , etc.
  • http://desarrollandoamerica.org/ 03 Dec Open Data Day
• Jasmine
  • BDD for JavaScript
  • https://github.com/netzpirat/guard-jasmine
  • https://github.com/bradphelan/jasminerice
• Storm
  • "Distributed and fault-tolerant realtime computation: stream processing, continuous computation, distributed RPC, and more"
• http://mcdlr.com/resp/
  • Demo of responsive web design (only HTML & CSS!)
  • Resize your window and it detects the viewport size.
• RConfCronogram-
  • Android app for RubyConf (screenshot)

Both

• Adhearsion
  • "Adhearsion is a new way to write voice-enabled applications."
• horaextra
  • http://smallactsmanifesto.org/
• From @eto:
  • WebHopper
  • A Hands-on Model of the Internet (youtube)

_ [javascript][mac][ruby] How to access original "window" from dotjs

Recently I installed dotjs. dotjs executes JavaScript files in ~/.js every time you open a web page. It's like greasemonkey etc., but it is as easy as putting a .js file in your $HOME.

Then I noticed that I cannot call a function defined globally in the original HTML from ~/.js/(domain-name).js. This is because dotjs is built with Chrome extension and Chrome executes the script as "Content script". Even you declare a function foo() in original page, window.foo evaluates to undefined in dotjs files.

I googled and found two solutions in Japanese tech site:

Solution 1

Rewrite location.href with javascript: scheme.

location.href = "javascript:some_func(123);";

Solution 2

Create a scirpt tag and append it to the document.

 $("head").append("<script type='text/javascript'>some_func(123);</script>");

Unfortunately, Solution 2 did not work in my environment (Mac 10.6.8 + Chrome 14.0.835.202).

_ [mac][ruby] homebrew prints a lot of "WARNING: Invalid .gemspec format in ..."

If you are using Ruby which is not the pre-installed one, homebrew may prints a lot of warnings:

WARNING:  Invalid .gemspec format in ...

This is because /usr/local/bin/brew starts with:

 #!/usr/bin/ruby

This means that homebrew uses the pre-installed Ruby and RubyGems, which may very old and not compatible to gemspecs generated by recent RubyGems.

Solution A

Upgrade system rubygems to newer version.

 $ /usr/bin/gem -v
 1.1.1
 $ wget http://rubyforge.org/frs/download.php/70695/rubygems-update-1.3.7.gem
 $ sudo /usr/bin/gem i rubygems-update-1.3.7 --local
 $ sudo /usr/bin/update_rubygems
 RubyGems 1.3.7 installed
 ...

(I could not install RubyGems 1.8.4 due to minitest, which it requires.

/Users/yhara % sudo /usr/bin/gem i ~/DOWN/minitest-2.1.0.gem --local
ERROR:  Error installing /Users/yhara/DOWN/minitest-2.1.0.gem:
        minitest requires minitest (>= 2.0.2)

what's happening!?)

Solution B

Edit the first line of the brew command like this:

 #!/usr/bin/env ruby

Then brew uses the Ruby and RubyGems you are using.

Note that homebrew does not support Ruby 1.9 officially; homebrew 0.8 looks working fine with Ruby 1.9.2 on my machine, but maybe you should use Ruby 1.8.7.

_ [sinatra] How to reload modular-style Sinatra apps with shotgun

As the FAQ sais, you need to write config.ru to enable auto-reloading with shogtun.

 # config.ru
 require 'app.rb'
 run MyApp

$ shotgun config.ru -p 12345

Or you can use sinatra-reloader, which is a litter faster than shotgun (version 0.5.0 is working fine with Sinatra 1.2.3).

 class Server < Sinatra::Base
   configure :development do
     require 'sinatra/reloader'
     register Sinatra::Reloader
     #also_reload "lib/**/*.rb"
   end
   ...

_ [rails] Colorizing Test::Unit with turn

I noticed that the redgreen gem does not work with Ruby 1.9.2 (and Rails 3.0.3).

 <internal:lib/rubygems/custom_require>:29:in `require': no such file to load -- test/unit/ui/console/testrunner (LoadError)

RSpec users don't need redgreen to colorize outputs, but I am trying Test::Unit this time.

Then I found turn via this ruby-forum thread:

• http://www.ruby-forum.com/topic/764346

Install

Edit Gemfile

group :test do
   gem 'turn'
end

and

$ bundle install

Edit test/test_helper.rb

 require 'turn'

Run

$ rake test:units

Output:

With autotest

If you require turn in test_helper.rb, the output of autotest is also colorized.

$ gem i ZenTest autotest-rails

$ autotest
loading autotest/rails
/Users/yhara/.rvm/rubies/ruby-1.9.2-p136/bin/ruby -I.:lib:test -rubygems -e "%w[test/unit test/unit/helpers/posts_helper_test.rb test/unit/translation_request_test.rb test/unit/helpers/translation_requests_helper_test.rb test/functional/posts_controller_test.rb test/unit/helpers/sessions_helper_test.rb test/functional/admin/translations_controller_test.rb test/functional/translation_requests_controller_test.rb test/unit/post_test.rb test/functional/admin/users_controller_test.rb test/functional/admin/posts_controller_test.rb test/unit/blade_test.rb test/unit/user_test.rb test/unit/translation_test.rb test/functional/translations_controller_test.rb test/functional/sessions_controller_test.rb test/unit/helpers/translations_helper_test.rb].each { |f| require f }" | unit_diff -u
...

_ [rails] How to use yield in Rails helpers

Example view:

 <%= foo(@posts) do |post| %>
   <%= post.title %>
 <% end %>

Wrong definition of foo:

 def foo(posts)
   "<div>" +
     posts.map{|post| yield post} +
    "</div>"
 end

I like this funcitonal-style, but it does not work.

Correct definition of foo:

 def foo(posts)
   concat "<div>"
   posts.each{|post| yield post}
   concat "</div>"
 end

• yield in helpers has a side effect!
• never use the return value of yield, it is not what you expect*1
• use TextHelper#concat to render static text

_ [ruby] Downloading non-UTF8 pages with open-uri

In Ruby 1.9, you can specify the encoding of the HTML to open-uri explicitly.

irb> require 'open-uri'
irb> url = "http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-dev/43008"
irb> html = open(url, "r:euc-jp").read

Then encode it to UTF-8:

irb> html.encode("utf-8")

Note that this conversion may raise Encoding::UndefinedConversionError, for example when the page contains invalid byte sequences.

String#encode takes options to surpless this exception.

irb> html.encode("utf-8", :invalid => :replace, :undef => :replace)

In Rails ...

Within a Rails3 app, this code may raise UndefiendConversionError:

html = open(url, "r:euc-jp").read

Rails3 sets Encoding.default_internal to UTF-8, so any string read from outer world is automatically converted to UTF-8 (and may fail if it contains broken chars).

You can skip the conversion by specifying "binary" (or "ascii-8bit") to open-uri, and then convert it manually.

html = open(url, "r:binary").read.encode("utf-8", "euc-jp",  :invalid => :replace, :undef => :replace)

_ [ruby] Using git-hub gem instead of github gem

The github gem provides the github command, which is very useful to create a repository on github. But it does not support Ruby 1.9 yet :-(

You can use the git-hub gem instead.

• https://github.com/defunkt/hub

Install

 $ gem install git-hub

Setup

If you are using the github gem, you may have done this already:

$ git config --global github.user YOUR_USER
$ git config --global github.token API_TOKEN

See https://github.com/account for your api token.

Usage

Create a github repository from a local git repo: (corresponds to `gh create-from-local')

$ hub create

Fork the github repository:

$ hub fork

The hub command works as a wrapper of git. If you set an alias like

$ alias git=hub

then you can do the above with `git create' and `git fork'.

_ [biwascheme] Released 0.5.5.1

Released BiwaScheme 0.5.5.1.

• http://www.biwascheme.org/

BiwaScheme is a Scheme interpreter written in pure JavaScript. I call it NoJS (Not only JavaScript) :-)

This release includes support for R6RS Records and several bug fixes.