Ruby on rails 101 - Peter Marklund's Home

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Stubbing and Mocking • Sometimes you may need to stub out interactions with external systems (payment gateways etc.) and isolate the code under test. • Mock and stub objects are similar, but mock objects tend to be more intelligent and verify that the right messages are received. • Mock classes that should be in place for all tests (static mocks) can be put under test/mocks/test. • You may use the libraries “Mocha and Stubba” or FlexMock for dynamic stubbing/mocking. The stubs/mocks that you set up are isolated to the test. 162
Mocha and Stubba Examples client = Goyada::HttpClient.new({}) client.expects(:http_timeout).returns(0.01) client.expects(:get_connection).returns(lambda { sleep 10 }) response = client.send(:https_response, "http://www.test.com", nil, nil) assert_equal(client.send(:error_response).code, response.code) assert_equal(Timeout::Error, response.exception.class) ::HttpClient.expects(:get_iso8859).with(http_url).returns("a piece of text") get :read, :dtmf => 3 assert_response :success assert_vxml "prompt", /a piece of text/ 163
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Ruby on Rails 101
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Agenda Monday Tuesday Wednesday Thu
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Kung-Fu? “Ruby o
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Rails background • Jason Fried +
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Rails Philosophy and Strengths •
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MVC Request Cycle 1. A request is m
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Directory Structure app controllers
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Useful Rake Tasks • db:migrate
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Environments • Every environment
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• raise @object.inspect Debugging
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“I always thought Smalltalk would
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Everything in Ruby
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Defining a class and Instantiating
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Getter- and Settter Methods class P
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Variable/Method Ambiguity Gotcha cl
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Defining Class Methods class Person
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Naming Conventions • MyClass •
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assignment • a, b = b, a # swappi
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modules # Mixins - instead of multi
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Everything is an object • 2 + 2 i
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Introspection andreas = Person.new(
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String class “ruby”.upcase +
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hash class h = {:lang => ‘<strong
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More About methods • Arbitrary nu
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Structs Rating = Struct.new(:name,
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Iterators: while, until, and for. K
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locks, closures, and proc objects d
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common string operations “ “.bl
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egular expressions puts “matches
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invoking external programs system(
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Ruby on the Comman
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Core Classes are Also Open class In
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Using the VCR vcr = VCR.new vcr.gsu
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eval, binding def evaluate_code(cod
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class Person def add_method(method)
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Object Space ObjectSpace.each_objec
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System Hooks: Class#inherited class
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Migrations 75
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Migrations: Managing Tables and Col
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Two Special Columns created_at and
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Let’s Bring Sexy Back # Note: thi
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Fundamentals • One database table
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CRUD • Create: create, new • Re
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if user.save # All is ok else # Cou
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Column/Attribute Data Types MySQL <
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Default Attribute Values class User
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find • User.find(:first) # => Use
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Power Find with Additional Attribut
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Like Clauses # Like this User.find(
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RecordNotFound Exception User.exist
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order = Order.find(12) order.name =
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Locking # SELECT * FROM accounts WH
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Destroy Class Methods def destroy(i
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Calculations Person.minimum(‘age
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Virtual Attributes # Virtual attrib
Page 111 and 112: Composite Attributes class Name att
Page 113 and 114: Chad Fowler Says ActiveRecord is an
Page 115 and 116: Controllers • Controllers are <st
Page 117 and 118: equest.env SERVER_NAME = localhost
Page 119 and 120: Render examples • render :text =>
Page 121 and 122: Cookies • A hash stored by the br
Page 123 and 124: Configuring Sessions • session :o
Page 125 and 126: Best Practice • Don’t put SQL a
Page 127 and 128: What is ActionView? • ActionView
Page 129 and 130: Template Environment • Templates
Page 131 and 132: Builder Template Example: RSS xml.i
Page 133 and 134: Partials • Partials are templates
Page 135 and 136: Passing Variables to Partials • C
Page 137 and 138: Layouts • Layouts are templates u
Page 139 and 140: Dynamic Layout Selection class Blog
Page 141 and 142: Helpers • Helpers are Rub
Page 143 and 144: url_helper.rb url_for({:controller
Page 145 and 146: Testing 145
Page 147 and 148: Test::Unit:TestCase • Test::Unit
Page 149 and 150: Unit Test Example require File.dirn
Page 151 and 152: Test Data with Fixtures • Fixture
Page 153 and 154: Assertions • assert(actual, comme
Page 155 and 156: Functional Test Example require Fil
Page 157 and 158: assert_select assert_select “p.wa
Page 159 and 160: Integration Test Example class Trac
Page 161: Running Tests • rake - runs all t
Page 165 and 166: cov • rcov is a Ruby</str
Page 167 and 168: AJAX and RJS Testing • When you d
Page 169 and 170: HTML Validation and Link Checking
Page 171 and 172: Test Case Specific Fixtures • Sha
Page 173 and 174: RSpec Examples require File.join(Fi
Page 175 and 176: class User has_one :weblog end clas
Page 177 and 178: elongs_to class LineItem < ActiveRe
Page 179 and 180: Methods added by has_many Firm#clie
Page 181 and 182: has_and_belongs_to_many # Requires
Page 183 and 184: Join Model with Conditions class Ar
Page 185 and 186: Polymorphic Associations create_tab
Page 187 and 188: Single Table Inheritance: Class Hie
Page 189 and 190: Acts As List class Parent < ActiveR
Page 191 and 192: Acts As Tree create_table :categori
Page 193 and 194: Eager Loading: From N+1 to 1 Query
Page 195 and 196: Association Callbacks class Project
Page 197 and 198: Validation • Validations are rule
Page 199 and 200: Validation Errors class Person < Ac
Page 201 and 202: Validation Macros: Usage class User
Page 203 and 204: Callback Sequence create update des
Page 205 and 206: efore_save Example class User < Act
Page 207 and 208: Observers class AuditObserver < Act
Page 209 and 210: ActionView Forms 209
Page 211 and 212: form_for - Wrapping Model Objects
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Processing Multiple Object Form Sub
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Select Boxes "name") form.collec
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date_helper.rb distance_of_time_in_
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form_tag_helper.rb - Working with N
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There is a Better Way: attachment_f
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Styling Error Messages Customize th
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Filters • Typically used to imple
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Filter Blocks and Classes around_fi
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Verification verify :only => :post_
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Caching • Rails provides three ty
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Cache Storage • Can store fragmen
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Cache Sweeper Declaration class Con
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Fragment Cache Storage • Fragment
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AJAX - Introduction • AJAX stands
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ActionView::Helpers:: PrototypeHelp
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ActionView::Helpers:: JavaScriptMac
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RJS • RJS is a Rails Ruby
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Example: Posting a Comment: The Con
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Options for Remote Links and Forms
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Options for Updating the Page • I
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Example: An AJAX Shopping Cart # In
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Observing Forms "search"}, {:id =>
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Options for Observers :url - url_fo
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The Spinner Icon module Application
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Drag and Drop Example: The Response
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Autocompletion: Example # In text f
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Global AJAX Hooks # In public/javas
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RJS Reuse module ApplicationHelper
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Routing Going Beyond :controller/:a
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Anatomy of a Route • map.route_na
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splat params map.connect ‘*anythi
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Routes in the console rs = ActionCo
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REST 277
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Rails Implementation of REST: CRUD
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map.resources :articles Method URL
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The Accept Header and Extensions #
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Nested Resources # Nested resources
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Consuming REST # You can any HTTP c
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ActionMailer 289
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Creating a Mailer # Creates app/mod
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Sending Email StatisticsMailer.deli
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Attachments class ApplicationMailer
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Unit Testing Mailers def setup Acti
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Plugins Introduction • Plugins is
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Creating Plugins • Generate your
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The Rails Module Inclusion Pattern
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ActiveSupport Introduction ActiveSu
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Enumerations groups = posts.group_b
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20.bytes 20.megabytes 20.seconds 20
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"åäö".size => 6 "åäö".chars.s
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Rails 2.0 • No radical changes, m
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Deployment 315
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FastCGI • FastCGI is a long runni
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Typical Mongrel Architecture • Th
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Mongrel Alternative: LiteSpeed •
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How to Use Capistrano gem install -
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Custom Capistrano Tasks def mongrel
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Capistrano 2.0 • New homepage at
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Gem Dependencies • It’s a good
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Security • SQL Injection - always
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Performance II • Use Memcached an
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Resources 335
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Videos and Audio • PeepCode.com -
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Applications and Frameworks • Ric
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Advice • Go with the flow. Stay o
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