JonRowe

lass One
  2   def original arg
  3     2
  4   end
  5 end
  6
  7 describe "one" do
  8   it 'does things' do
  9     one = One.new
 10     one.stub(:original) do |arg|

JonRowe

class Thing

  def [] a, &block
    block.call a
  end

end

thing = Thing.new

JonRowe

def test
  begin
    raise
    local = 'b'
  rescue
  ensure
    return defined?(local) || false
  end
end

JonRowe

set :use_sudo, false

set :ssh_options, forward_agent: true

role :app, ENV['hostname'], primary: true

default_run_options[:pty] = true

JonRowe

require 'benchmark'
require 'stringio'

sizes = [10,100,1000,10000]

def measure(&block)
  puts Benchmark.measure { 100000.times(&block) }
end

sizes.each do |size|

JonRowe

1.9.3p448 :002 > a = [-> { puts 1; true }, -> { puts 2; false}, -> { puts 3; false }]
 => [#<Proc:0x007fe5c41a8f68@(irb):2 (lambda)>, #<Proc:0x007fe5c41a8f18@(irb):2 (lambda)>, #<Proc:0x007fe5c41a8ef0@(irb):2 (lambda)>]
1.9.3p448 :003 > a.all?(&:call)
1
2
 => false
1.9.3p448 :004 > a = [-> { puts 1; false }, -> { puts 2; true}, -> { puts 3; false }]
 => [#<Proc:0x007fe5c4276620@(irb):4 (lambda)>, #<Proc:0x007fe5c42765d0@(irb):4 (lambda)>, #<Proc:0x007fe5c42765a8@(irb):4 (lambda)>]
1.9.3p448 :005 > a.any?(&:call)
1

JonRowe

Use contexts

Contexts are a powerful method to make your tests clear and well organized. In the long term this practice will keep tests easy to read.

I agree with the premise, and I agree that this:

BAD
it 'has 200 status code if logged in' do

JonRowe

Most active GitHub users (git.io/top)

The count of contributions (summary of Pull Requests, opened issues and commits) to public repos at GitHub.com from Sat, 17 Nov 2012 22:58:25 GMT till Sun, 17 Nov 2013 22:58:25 GMT.

Only first 1000 GitHub users according to the count of followers are taken. This is because of limitations of GitHub search. Sorting algo in pseudocode:

githubUsers
 .filter((user) -> user.followers > 30)

JonRowe

require 'benchmark'

array = 10000000.times.to_a

puts "Any"
puts Benchmark.measure { 1000.times { array.any? } }

puts "Empty"
puts Benchmark.measure { 1000.times { array.empty? } }

JonRowe

require 'json'

class Shell
  def self.heroku_apps
    new('heroku apps').cache_at 'heroku_app_cache'
  end

  def self.ruby_version app
    new("heroku run \"ruby -v\" --app #{app}").cache_at "ruby_version_#{app}"
  end