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Manipulowanie czasem w testach w aplikacjach Ruby
by Jakub Kosiński | 2 days ago | Read moreCzasem, szczególnie podczas pisania testów, zachodzi potrzeba manipulowania czasem, np. podczas testowania metod, które mają zwracać posortowane względem czasu utworzenia obiekty ActiveRecord.
W ostatnim projekcie podczas pisania spec-ów modeli korzystałem z takiego tworu:
describe SomeClass do
describe "by_date" do
it "should return objects sorted by creation date" do
Time.advancing_by_days(-1) do
@earlier = SomeClass.new(:some => "values")
end
@normal = SomeClass.new
Time.advancing_by_days(1) do
@later = SomeClass.new(:some => "other value")
end
SomeClass.by_date.should == [@later, @normal, @earlier]
end
end
end
O ile mi wiadomo, Railsy nie mają standardowo wbudowanych klas do manipulowania czasem, czy metodą Time.now.
Stworzenie metod realizujących powyższą funkcjonalność jest bardzo proste. Wystarczy stworzyć plik, np. time_extensions.rb z poniższą zawartością:
require 'time'
if !Time.respond_to?('old_now')
Time.class_eval {
@@advance_by_days = 0
@@advance_by_minutes = 0
cattr_accessor :advance_by_days, :advance_by_minutes
class << Time
alias old_now now
def now
if Time.advance_by_days != 0
return Time.at(old_now.to_i + Time.advance_by_days * 60 * 60 * 24 + 1)
elsif Time.advance_by_minutes != 0
return Time.at(old_now.to_i + Time.advance_by_minutes * 60)
else
old_now
end
end
def advancing_by_days(days=0)
Time.advance_by_days = days
yield
Time.advance_by_days = 0
end
def advancing_by_minutes(minutes=0)
Time.advance_by_minutes = minutes
yield
Time.advance_by_minutes = 0
end
end
}
end
Jak widać korzystamy z możliwości, jakie daje monkey pathing i modyfikujemy standardową metodę Time.now, uprzednio tworząc do niej alias. W powyższym kodzie oprócz zmiany czasu o zadaną liczbę dni, możemy zmieniać go o zadaną liczbę minut.
Aby korzystać z powyższych metod w spec-ach aplikacji railsowej, wystarczy wrzucić plik z powyższym kodem do katalogu spec aplikacji i dopisać do pliku spec_helper.rb linijkę:
require 'time_extensions'
Protest tomorrow over bill C-61
by Guy Davis | 2 days ago |
Read more I'll be heading to Jim Prentice's Stampede Breakfast tomorrow morning with the rest of the "Fair Copyright for Canada" group to let him know my thoughts on his Canadian DMCA. Since he's hidden himself away and hasn't consulted with the public on his bill, this is how we'll hopefully get him to listen to reason.
Responsing to FastCompany’s Big Idea - Business email will eventually be replaced… like Twitter and company wikis.
by Bill Heaton | 2 days ago |
Read more I would suggest that businesses seriously consider self hosted wiki/forums or other web-based application for collaboration among teams and also to support a positive company coulture. When employees are plugged-in often this generates a sense of belonging and ownership. I also believe that using an internal server to run a chat service along the lines [...]
Wordle
by Gunnar Wolf | 2 days ago |
Read more Via Planetalinux.mx, I read this post by César Espino refering to Wordle.
Quoting from Wordle's main page:
Wordle is a toy for generating “word clouds” from text that you provide. The clouds give greater prominence to words that appear more frequently in the source text. You can tweak your clouds with different fonts, layouts, and color schemes. The images you create with Wordle are yours to use however you like. You can print them out, or save them to the Wordle gallery to share with your friends.
I could not resist it. I even went to a computer with a Java runtime installed.
The application is very nice and usable, although its startup time is frankly irritating (specially as there is no feedback on why it's not loading). Anyway, the results are quite beautiful!
PayPal hack
by Frantisek Malina | 2 days ago |
Read more Many users complained about the PayPal payment page being designed in a way that intentionaly hides the credit card payment option and forces users to login with a PayPal account. Bad for PayPal as they are wrong thinking think this will increase their user base, double evil for online merchants conversions. I’ve hacked (not cracked) [...]
PayPal hack
by Frantisek Malina | 2 days ago |
Read more Many users complained about the PayPal payment page being designed in a way that intentionaly hides the credit card payment option and forces users to login with a PayPal account. Bad for PayPal as they are wrong thinking think this will increase their user base, triple evil for online merchants conversions. I’ve hacked (not cracked) [...]
July podcast posted: Winning t…
by Bill Heaton | 2 days ago |
Read more July podcast posted: Winning the #1 Search Engine Result for Your Key Phrase - http://pixelhandler.com
Winning the #1 Search Engine Result for Your Key Phrase
by Bill Heaton | 2 days ago |
Read more Internet Marketing Report and Social Media Highlights Newsletter - July 2008 This newsletter will mail out the first week of each month, please visit the link below to opt-in http://lists.pixelhandler.com ‘Bill’s Internet Marketing Report’ - Winning the #1 Search Engine Result for Your Key Phrase - Strategies and topics relating to the happenings I experience in the race [...]
danhigham: Adding a message to get RSS working from Twitter
by Dan Higham | 2 days ago | Read moredanhigham: Adding a message to get RSS working from Twitter
GrApple Yummy (blue) :: Firefox Add-ons
by Ryan L. Cross | 2 days ago |
Read more GrApple Yummy (blue) :: Firefox Add-ons
Firefox 3 optimized builds for G5 / Intel
by Ryan L. Cross | 2 days ago |
Read more Firefox 3 optimized builds for G5 / Intel
push me pull me
by Miha Plohl | 2 days ago |
Read more na domačem meku
git clone --bare projektich projektich.git
scp projektich.git nekdo@odnekogaserver.com:/home/nekdo/
git clone nekdo@odnekogaserver:/home/nekdo/projektich.git mojklonprojekticha
cd mojklonprojekticha
git push
git pull
RE: RE: Server Side Software Engineer
by Ruslan Voloshin | 2 days ago |
Read more думаю требование знания языка на котором написаны требования, так что елси кто не сможет прочитать то и не напишет, хотя у меня с английским тоже не валом дела обстоят. В наших школах до сих пор готовят партизанов на немецком языке :(
Чудесная новость
by Ruslan Voloshin | 2 days ago |
Read more Нас добавили в dmoz каталог Top: World: Russian: Компьютеры: Программирование: Языки: Ruby Мы первые :) по сему предлагаю просто хитрый метод который позволяет с помощью hpricot проверять елси лы ваш сайт в каталоге.
def dmoz_catalog
#http://search.dmoz.org/cgi-bin/search?search=u%3Acocos.com.ua
page = get_page('search.dmoz.org', "/cgi-bin/search?search=u%3A#{@host}")
doc = Hpricot.parse(page.body)
cat = doc.search("ol[@start='1']/li/b")
cat.empty? ? nil : cat.html
end
def get_page(host = @host, path = @path, port = @port)
port ||= 80
begin
req = Net::HTTP::Get.new(path)
puts "Request HOST #{host}"
puts "Request Path #{path}"
res = Net::HTTP.start(host, port) {|http|
http.request(req)
}
rescue Exception => e
@@logger.info(e)
nil
ensure
return res
end
end
# НУ и вызов метода собственно
links = Link.new
links.set_page('http://rubyclub.com.ua')
puts links.dmoz_catalog
В результате напечатается или ничего или html ссылка на раздел каталога в котором находится сайт.dmoz каталог
Star Wars Museum
by Scott Hacker | 2 days ago | Read moreSpent a day of our recent vacation at the Minnesota Museum of Science’s Star Wars exhibit - the largest collection of actual Star Wars props and models ever assembled. Miles was jumping out of his skin with excitement, seeing actual/life-sized land speeders and battle droids, scaled down ship models used by ILM in [...]
RE: Server Side Software Engineer
by Ruslan Voloshin | 2 days ago |
Read more Между прочим в сообществе приянто общаться на его (сообщества) языке. При этом никто не запрещает упомянуть об требуемом уровне знания англ/нем/идиш/итд языка.
RE: RE: FCKeditor on Rails
by Ruslan Voloshin | 2 days ago |
Read more Язык меняется насткойками в файле конфига в public папке к стати конфиг имеет вроде расширение JS БОлее подробно сейчас не помню.
RE: стили в in_place_editor
by Ruslan Voloshin | 2 days ago |
Read more А ты посмотри что пишется в HTML с помощью firebug и увидишь чем можно воздействовать.
firebug
RE: FCKeditor on Rails
by Ruslan Voloshin | 2 days ago |
Read more Привет! Не подскажешь, как изменить язык итнерфейса в FCKeditor?
2008년 7월 4일
by Heungseok Do | 2 days ago | Read more- 37signals 단계적으로 IE6 지원 중단. 용기가 대단한 건가… IE6 쓰는 일반 사용자가 없다는 얘긴가…2008-07-04 09:09:53
이 글은 꽃띠앙님의 2008년 7월 4일의 미투데이 내용입니다.
<!-- end of daily_digest -->User Interface design for the iPhone
by Rahoul Baruah | 2 days ago | Read moreJohn Gruber finds a great example of iPhone UI design. Sometimes you have to wonder what goes through people’s heads. http://www.flickr.com/photos/gruber/2635257578/
"4th of july is the best holiday— no need to buy presents, or spend time w/ the relatives, or..."
by John Reilly | 2 days ago |
Read more “4th of july is the best holiday— no need to buy presents, or spend time w/ the relatives, or dress up, or go to church… just a day off work, fireworks, nice weather and food.”
- My Linh Pham
Salvem os Desenvolvedores
by Luiz Arão A. Carvalho | 2 days ago | Read moreEntrando na campanha… A incompatibilidade de alguns browsers acabam comprometendo a eficárcia e a produtividade dos desenvolvedores então galere utilizem sempre os browsers atuais é bom pra gente mas é melhor ainda para você! Save A Developer. Upgrade Your Browser. Melhor de Segurança Melhor Interface Navegador com Abas Bloqueia popup Download Melhor Segurança Plugins personalizáveis Navegação com Abas Download Improved Security Enhanced JavaScript Functionality Tabbed Browsing Download Improved [...]
How to nap - Boston.com
by Patrick Curtain | 2 days ago |
Read more http://www.boston.com/bostonglobe/ideas/naps/
--p
http://www.patrickcurtain.com/
patrick@patrickcurtain.com
+1-360-521-9625
Some things are inherently complicated and slow ... put them in the right place
by Alex Rothenberg | 2 days ago | Read moreOne of the first lessons I learned when I started working as a software developer professionally was that you don't always have to make an action fast, sometimes its just enough to make it seem fast to a user. This lesson was learned in the 1990s in the context of a Windows application. What we did was quickly draw part of the screen (or a splash image) immediately then do the time consuming work in the background so that by the time the user was ready to interact with the application we'd be ready for them.
Recently I was reminded of this lesson on a website I'm working on. We have a complicated report to show on the user's homepage. My first implementation involved generating the report in real-time when the page is loaded but this was very slooooow. Some profiling and analysis let us make it somewhat faster but not fast enough.
I was stumped until I remembered my old lesson. If it wasn't possible to generate the report quickly, perhaps we could do it sometime when the user wouldn't mind.
Luckily this is a Rails application and ActiveRecord Callbacks make it easy to do this. I could pregenerate the report and update a portion of it each time something is saved. Users expect a save to take some time and don't do it that often. Then generating the homepage becomes just a simple matter of displaying the existing rows.
My applicatiion looks something like this.
#app/models/person.rb & any other models that affect the report
#When a Person changes tell the ReportGenerator add/delete/update the appropriate rows
class Person <>after_destroy {|person| ReportGenerator::Person.destroyed(person)}
after_create {|person| ReportGenerator::Person.created(person) }
after_update {|person| ReportGenerator::Person.updated(person) }
end
#lib/report_generator.rb
#The complicated (and slow) logic goes here
module ReportGenerator
class Executive
def destroyed(executive)
#figure out which rows to delete from the report and persist with the Report model
end
def created(executive)
#figure out which rows to add to the report and persist with the Report model
end
def updated(executive)
#figure out which rows to update in the report and persist with the Report model
end
end
#Similar classes corresponding to the other models that trigger recalculations would go here
end
#app/models/report_row.rb
#app/controllers/report_controller.rb
#app/views/report/index.html.erb
#Models the persisted rows in my report and the controller and view to display it
The interesting insight for me is that when optimizing there are sometimes hard problems that can't be solved. Its important not to lose sight of the goal you're aiming at (a satisfying user experience) and that sometimes involves spending the computational time somewhere where the user won't mind.
Rails-doc.org is my new Rails Reference
by Robert Olson | 2 days ago |
Read more When working with a framework as large as Ruby on Rails its necessary to have a reference close by for… well just about everything. Until until recently I was a big fan of gotAPI.com because I really appreciated the Ruby and Rails reference tied together. However, the Javascript autocomplete on their search box is broken [...]
Blues, Greens, Whites [Flickr]
by Andreas Aderhold | 2 days ago | Read moreRo Dinal posted a photo:
Blues, Greens, Whites [Flickr]
by Andreas Aderhold | 2 days ago | Read moreRo Dinal posted a photo:
Independence Day
by Chris Blackburn | 2 days ago |
Read more Happy July 4th to every American out there!
Deploying Sinatra on DreamHost - Internal Server Error with views
by Christopher Shea | 2 days ago |
Read more I’ve been playing around with Sinatra (it’s awesome!) and thought I’d deploy something to my mess-around DreamHost account. I followed these instructions which totally worked and was so easy. But when it came time to actually deploy my real app with real views, I got nothing but “Internal Server Error”. Internal Server Error is not very [...]
Rakefile toujours…
by Gregoire Lejeune | 2 days ago | Read moreJ’ai fait quelques corrections dans les taches Rake pour les applications Bivouac. Cela fonctionne plutôt pas mal, et je vais donc pouvoir penser à passer cette version en phase de tests. Pour cela je vais me pencher sur la réécriture des exemples. De plus, comme Camping à l’air de dormir un peu dans son repository, [...]
Two simple web businesses (via Google Reader)
by Nolan Eakins | 2 days ago |
Read more 
shared an item on Google Reader
Readable test names in Rails 2.1
by Hongli Lai | 2 days ago |
Read more I’m currently working on a Rails application. It has some non-trivial business rules, so I ended up writing test methods along the lines of: Ruby def test_a_message_with_a_password_protected_channel_as_recipient_will_be_delivered_to_a_users_mailbox_if_that_user_is_subscribed_to_said_channel Okaaaay….. This is what I think of that method name: Nice boat! Other than the mental-psychological stress as well as an unexplainable impending feeling of doom that such a long method [...]
Hospedagem gratuita para domínios .can.br
by Roberto Bertó | 2 days ago | Read moreCom a disponibilidade dos domínios .can.br para registro no Registro.br,a TeHospedo, em parceria com seus parceiros desenvolvedores de sites, está oferecendo hospedagem gratuita no plano Econômico para sites de candidatos as Eleições Municipais de 2008. O objetivo é apoiar os desenvolvedores de sites que tem site hospedado conosco e também apoiar a democracia brasileira unindo a [...]
The Privacy Paradox
by Patrick Curtain | 2 days ago |
Read more Saw this /. article and read the Privacy Paradox from the NYT. In line with what I always thought; people don't really think about privacy and act openly. Until you mention privacy TO them.
Hospedagem Rails agora com Passenger (mod_rails)
by Roberto Bertó | 2 days ago | Read moreNo mês de julho iremos oferecer hospedagem gratuita para interessados em testar nossa plataforma Rails rodando Passenger. O Passenger é uma forma do Apache “falar” com o Ruby on Rails, outros “dialetos” usados são FastCGI, Mongrel e CGI. A TeHospedo pode suportar todos, mas atualmente está trabalhando mais com FastCGI e com Passenger. Interessados em testar o [...]
Happy Independence Day to the …
by Bill Heaton | 2 days ago |
Read more Happy Independence Day to the USA, show your colors: http://tinyurl.com/USflag
Alright quad-shot Americano… it’s just you me and this project. A little help, please?...
by Ryan L. Cross | 2 days ago |
Read more Alright quad-shot Americano… it’s just you me and this project. A little help, please? kthxbai.
Hash-ment mieux…
by Gregoire Lejeune | 2 days ago | Read moreclass Hash def <<(h);h.each{|k,v|self[k]=v};end alias :to_str :to_s def to_s;"{"+self.map{|k,v|k.inspect+" => "+v.inspect}.join(‘, ‘)+"}";end end
Ajánló: Rails blog kezdőknek
by Ferenc Fekete | 2 days ago | Read moreBár ezen a blogon a hírek mellett inkább “advancedebb” témákkal foglalkozunk az ide tévedő, rails-el most ismerkedő látogatóknak hasznos lehet Pepusz blogja, amely mostanában indult és célja a keretrendszer népszerűsítése.
Svg Viewer Demo
by Tiago Cardoso | 2 days ago | Read moreWe are still working on the new editor for both InputDraw and Comics Sketch. Here is a short demo of the current state of the SVG Viewer. It still has its glitches and bugs.. and not every Svg will load, but we are getting there. But more important than the svg viewing capabilities is the draw [...]
Wormhole: Let's Communicate Between Caller and Callee
by Genki Takiuchi | 2 days ago | Read moreI made a small utility library named Wormhole. The library enables us to communicat<wbr />e between caller and callee.
Here is a simple example of use.
1 require 'rubygems' 2 require 'wormhole' 3 4 def foo(array) 5 array << :foo # (1) 6 Wormhole.throw array 7 array << :baz # (3) 8 end 9 10 result = Wormhole.catch do 11 foo [] 12 end.return do |array| 13 array << :bar # (2) 14 end 15 puts result.inspect # => [:foo, :bar, :baz]
First, the block passed to Wormhole.c<wbr />atch, the caller, is evaluated.<wbr /> The foo method, the callee, throw an array object passing through the wormhole. Then the array is caught by the last block passed to a return method. A block parameter of the block is the array. Finally, the process goes back to the point 3 after the last block ends. A return value of the foo method is returned via the return method.
By using this utility, you can participat<wbr />e to a depth of a complicate<wbr />d system from a safer position.
At the end, you can install this utility from the GitHub by using gem command like this.
1 % sudo gem sources -a http://gem<wbr />s.github.c<wbr />om 2 % sudo gem install genki-worm<wbr />hole
Have fun!
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