ClayShentrup

case some_value
  when 1..10
    "do some stuff here"
  when 11..20
    "do something else here"
  else
    "out of range"
end

# compared to

ClayShentrup

class Wrap < Struct.new(:string, :max_length)
  def self.wrap(s, max_length)
    raise ArgumentError.new("Maximum wrap length can't be 0") if max_length == 0
    new(s, max_length).wrap
  end
  
  def wrap
    return [""] if blank?
    string.scan(regexp)
  end

ClayShentrup

require 'test/unit'

class Whale
  def self.attr_validated(method_name, &validation)
    # Enter code here to make all tests pass.
  end

  attr_validated :num_teeth do |v|
    v <= 4
  end

ClayShentrup

function beget(parent, child){
  // put code here to make test() return true
};

function test(){
  function Parent(){
    throw 'exception';
  };

  Parent.prototype = {code: Math.random()};

ClayShentrup

it('uses the client time zone') do
  allow(described_class).to receive(:delete_cache) do
    fail unless Time.zone == client_time_zone
  end
  allow(described_class).to receive(:create_cache) do
    fail unless Time.zone == client_time_zone
  end
  update_for_year
end

ClayShentrup

require 'spec_helper'

describe BucketsController do
  render_views
  login_admin

  def valid_attributes
    FactoryGirl.attributes_for(:bucket)
  end

ClayShentrup

describe Sweeper do
  context 'a subscription is expired' do
    let(:bob) { double(active?: true, paid_at: 2.months.ago) }
    let(:users) { [bob] }
    before { allow(User).to receive(:all).and_return(users) }
    
    it 'emails the user' do
      expect(UserMailer).to receive(:billing_problem).with(bob)
      described_class.sweep
    end

ClayShentrup

expected collection contained:  [#<User id: 1, email: "user1@example.com", ...a bunch of attributes...>]
actual collection contained:    [#<User id: 1, email: "user1@example.com", ...a bunch of attributes...>,
#<User id: 2, email: "user2@example.com", ...a bunch of attributes...>]

ClayShentrup

module NamesForLetObject
  def names_for_let_objects(objects)
    objects.map { |object| name_for_let_object(object) }
  end
  
  def name_for_let_object(object)
    __memoized.instance_variable_get(:@memoized).key(object)
  end
end

ClayShentrup

RSpec.shared_examples('a foreign_key constraint association') do
  specify do
    expect do
      build(described_model, "#{association}_id" => 0).save(validate: false)
    end.to raise_error(ActiveRecord::InvalidForeignKey)
  end
end