Minha palestra de introdução à cultura e ecossistema Ruby on Rails que dei na Enecomp 2009, em Curitiba, Paraná.

1. Ruby on Rails
Tuesday, September 8, 2009

2. AkitaOnRails.com
slideshare.net/akitaonrails
Tuesday, September 8, 2009

3. 2008
Tuesday, September 8, 2009

4. 2008
Tuesday, September 8, 2009

5. 13 e 14
Outubro
2009
Tuesday, September 8, 2009

6. Tuesday, September 8, 2009

7. > 100 slides
< 1 hora
Tuesday, September 8, 2009

8. www.slideshare.net/akitaonrails
fabio.akita@locaweb.com.br
Tuesday, September 8, 2009

9. Tuesday, September 8, 2009

10. Tuesday, September 8, 2009

11. Tuesday, September 8, 2009

12. Ruby on Rails 2.3
Ruby 1.8
“Novo” Ruby 1.9
Tuesday, September 8, 2009

13. Ruby on Rails 2.3
Ruby 1.8
“Novo” Ruby 1.9
Tuesday, September 8, 2009

14. Ruby on Rails 2.3
Ruby 1.8
“Novo” Ruby 1.9
Tuesday, September 8, 2009

15. “Matz”
1993
Tuesday, September 8, 2009

16. Tuesday, September 8, 2009

17. “Prag Dave”
2001
Tuesday, September 8, 2009

18. Tuesday, September 8, 2009

19. “DHH”
2004
Tuesday, September 8, 2009

20. Tuesday, September 8, 2009

21. Tuesday, September 8, 2009

22. Charles Nutter
2006
Tuesday, September 8, 2009

23. Tuesday, September 8, 2009

24. Tuesday, September 8, 2009

25. Tuesday, September 8, 2009

26. Tuesday, September 8, 2009

27. “Tornar as coisas
simples fáceis e as
coisas complexas
possíveis”
Filosofia Ruby
Tuesday, September 8, 2009

28. Tuesday, September 8, 2009

29. Tuesday, September 8, 2009

30. Tuesday, September 8, 2009

31. Tuesday, September 8, 2009

32. Orientação a
Objetos
Tuesday, September 8, 2009

33. Tuesday, September 8, 2009

34. Tuesday, September 8, 2009

35. Tuesday, September 8, 2009

36. “Eu inventei o
termo ‘orientação
a objetos’, e posso
lhes dizer que eu
não estava
pensando em C++.”
Tuesday, September 8, 2009

37. Meta-programação
Tuesday, September 8, 2009

38. Meta-apresentação
Tuesday, September 8, 2009

39. Tuesday, September 8, 2009

40. Ruby on Rails
Tuesday, September 8, 2009

41. Código que gera Código
Convention over Configuration
Don’t Repeat Yourself
Extreme Programming
Tuesday, September 8, 2009

42. Código que gera Código
Convention over Configuration
Don’t Repeat Yourself
Extreme Programming
Tuesday, September 8, 2009

43. Código que gera Código
Convention over Configuration
Don’t Repeat Yourself
Extreme Programming
Tuesday, September 8, 2009

44. Código que gera Código
Convention over Configuration
Don’t Repeat Yourself
Extreme Programming
Tuesday, September 8, 2009

45. Tuesday, September 8, 2009

46. Tuesday, September 8, 2009

47. Tuesday, September 8, 2009

48. Tuesday, September 8, 2009

49. Tuesday, September 8, 2009

50. Tuesday, September 8, 2009

51. Tuesday, September 8, 2009

52. Tuesday, September 8, 2009

53. Tuesday, September 8, 2009

54. Tuesday, September 8, 2009

55. Tuesday, September 8, 2009

56. Tuesday, September 8, 2009

57. Tuesday, September 8, 2009

58. Tuesday, September 8, 2009

59. Model
class Product < ActiveRecord::Base
after_create :set_initial_inventory
has_many :variants, :dependent => :destroy
has_many :images, :as => :viewable, :order => :position,
:dependent => :destroy
has_many :properties, :through => :product_properties
belongs_to :tax_category
validates_presence_of :name
validates_presence_of :master_price
validates_presence_of :description
make_permalink :with => :name, :field => :permalink
end
Tuesday, September 8, 2009

60. Model
class Product < ActiveRecord::Base
after_create :set_initial_inventory
has_many :variants, :dependent => :destroy
has_many :images, :as => :viewable, :order => :position,
:dependent => :destroy
has_many :properties, :through => :product_properties
belongs_to :tax_category
validates_presence_of :name
validates_presence_of :master_price
validates_presence_of :description
make_permalink :with => :name, :field => :permalink
end
Tuesday, September 8, 2009

61. Model
class Product < ActiveRecord::Base
after_create :set_initial_inventory
has_many :variants, :dependent => :destroy
has_many :images, :as => :viewable, :order => :position,
:dependent => :destroy
has_many :properties, :through => :product_properties
belongs_to :tax_category
validates_presence_of :name
validates_presence_of :master_price
validates_presence_of :description
make_permalink :with => :name, :field => :permalink
end
Tuesday, September 8, 2009

62. Model
class Product < ActiveRecord::Base
after_create :set_initial_inventory
has_many :variants, :dependent => :destroy
has_many :images, :as => :viewable, :order => :position,
:dependent => :destroy
has_many :properties, :through => :product_properties
belongs_to :tax_category
validates_presence_of :name
validates_presence_of :master_price
validates_presence_of :description
make_permalink :with => :name, :field => :permalink
end
Tuesday, September 8, 2009

63. Model
class Product < ActiveRecord::Base
after_create :set_initial_inventory
has_many :variants, :dependent => :destroy
has_many :images, :as => :viewable, :order => :position,
:dependent => :destroy
has_many :properties, :through => :product_properties
belongs_to :tax_category
validates_presence_of :name
validates_presence_of :master_price
validates_presence_of :description
make_permalink :with => :name, :field => :permalink
end
Tuesday, September 8, 2009

64. Model
class Product < ActiveRecord::Base
after_create :set_initial_inventory
has_many :variants, :dependent => :destroy
has_many :images, :as => :viewable, :order => :position,
:dependent => :destroy
has_many :properties, :through => :product_properties
belongs_to :tax_category
validates_presence_of :name
validates_presence_of :master_price
validates_presence_of :description
make_permalink :with => :name, :field => :permalink
end
Tuesday, September 8, 2009

65. Model
class Product < ActiveRecord::Base
after_create :set_initial_inventory
has_many :variants, :dependent => :destroy
has_many :images, :as => :viewable, :order => :position,
:dependent => :destroy
has_many :properties, :through => :product_properties
belongs_to :tax_category
validates_presence_of :name
validates_presence_of :master_price
validates_presence_of :description
make_permalink :with => :name, :field => :permalink
end
Tuesday, September 8, 2009

66. Views ERB
<div id="product-listing">
<%= breadcrumbs(@taxon) %>
<br/>
<%= render :partial => "shared/products.html.erb",
:locals => {:products => @products, :taxon => @taxon } %>
</div>
<% content_for :sidebar do %>
<td id="shop-by-col" valign="top">
<%= render :partial => "shared/taxonomies" %>
</td>
<% end %>
<%= render :partial => 'shared/paginate',
:locals => {:collection => @products, :options => {}}
unless @products.empty? %>
Tuesday, September 8, 2009

67. Views ERB
<div id="product-listing">
<%= breadcrumbs(@taxon) %>
<br/>
<%= render :partial => "shared/products.html.erb",
:locals => {:products => @products, :taxon => @taxon } %>
</div>
<% content_for :sidebar do %>
<td id="shop-by-col" valign="top">
<%= render :partial => "shared/taxonomies" %>
</td>
<% end %>
<%= render :partial => 'shared/paginate',
:locals => {:collection => @products, :options => {}}
unless @products.empty? %>
Tuesday, September 8, 2009

68. Views ERB
<div id="product-listing">
<%= breadcrumbs(@taxon) %>
<br/>
<%= render :partial => "shared/products.html.erb",
:locals => {:products => @products, :taxon => @taxon } %>
</div>
<% content_for :sidebar do %>
<td id="shop-by-col" valign="top">
<%= render :partial => "shared/taxonomies" %>
</td>
<% end %>
<%= render :partial => 'shared/paginate',
:locals => {:collection => @products, :options => {}}
unless @products.empty? %>
Tuesday, September 8, 2009

69. Rotas RESTFul
ActionController::Routing::Routes.draw do |map|
map.resources :products
map.resources :addresses
map.resources :orders, :has_many => [:line_items]
map.namespace :admin do |admin|
admin.resources :users
admin.resources :products
end
end
Tuesday, September 8, 2009

70. Rotas RESTFul
ActionController::Routing::Routes.draw do |map|
map.resources :products
map.resources :addresses
map.resources :orders, :has_many => [:line_items]
map.namespace :admin do |admin|
admin.resources :users
admin.resources :products
end
end
Tuesday, September 8, 2009

71. Rotas RESTFul
ActionController::Routing::Routes.draw do |map|
map.resources :products
map.resources :addresses
map.resources :orders, :has_many => [:line_items]
map.namespace :admin do |admin|
admin.resources :users
admin.resources :products
end
end
Tuesday, September 8, 2009

72. Rotas RESTFul
ActionController::Routing::Routes.draw do |map|
map.resources :products
map.resources :addresses
map.resources :orders, :has_many => [:line_items]
map.namespace :admin do |admin|
admin.resources :users
admin.resources :products
end
end
Tuesday, September 8, 2009

73. Rotas RESTFul
GET /products/new
ActionController::Routing::Routes.draw do |map|
GET /products
POST /products
map.resources :products
map.resources :addresses
map.resourcesGET /products/1 => [:line_items]
:orders, :has_many
map.namespaceGET /products/1/edit
:admin do |admin|
PUT /products/1
admin.resources :users
admin.resources :products
end DESTROY /products/1
end
Tuesday, September 8, 2009

74. Controller
class UsersController < Spree::BaseController
resource_controller
before_filter :initialize_extension_partials
actions :all, :except => [:index, :destroy]
show.before do
@orders = Order.checkout_completed(true)
.find_all_by_user_id(current_user.id)
end
create.after { self.current_user = @user }
create.response do |wants|
wants.html { redirect_back_or_default(products_path) }
end
end
Tuesday, September 8, 2009

75. Controller
class UsersController < Spree::BaseController
resource_controller
before_filter :initialize_extension_partials
actions :all, :except => [:index, :destroy]
show.before do
@orders = Order.checkout_completed(true)
.find_all_by_user_id(current_user.id)
end
create.after { self.current_user = @user }
create.response do |wants|
wants.html { redirect_back_or_default(products_path) }
end
end
Tuesday, September 8, 2009

76. Controller
class UsersController < Spree::BaseController
resource_controller
before_filter :initialize_extension_partials
actions :all, :except => [:index, :destroy]
show.before do
@orders = Order.checkout_completed(true)
.find_all_by_user_id(current_user.id)
end
create.after { self.current_user = @user }
create.response do |wants|
wants.html { redirect_back_or_default(products_path) }
end
end
Tuesday, September 8, 2009

77. “Beautiful Code”
Tuesday, September 8, 2009

78. @Transient
public BigDecimal getTotal()
//$Id: Booking.java 5579 2007-06-27 00:06:49Z gavin $ {
package org.jboss.seam.example.booking; return hotel.getPrice().multiply( new BigDecimal( getNights() ) );
}
import java.io.Serializable;
import java.math.BigDecimal; @Transient
import java.text.DateFormat; public int getNights()
import java.util.Date; {
return (int) ( checkoutDate.getTime() - checkinDate.getTime() ) /
import javax.persistence.Basic; 1000 / 60 / 60 / 24;
import javax.persistence.Entity; }
import javax.persistence.GeneratedValue;
import javax.persistence.Id; @Id @GeneratedValue
import javax.persistence.ManyToOne; public Long getId()
import javax.persistence.Temporal; {
import javax.persistence.TemporalType; return id;
import javax.persistence.Transient; }
public void setId(Long id)
import org.hibernate.validator.Length; {
import org.hibernate.validator.NotNull; this.id = id;
import org.hibernate.validator.Pattern; }
import org.jboss.seam.annotations.Name;
@NotNull
@Entity @Basic @Temporal(TemporalType.DATE)
@Name("booking") public Date getCheckinDate()
public class Booking implements Serializable {
{ return checkinDate;
private Long id; }
private User user; public void setCheckinDate(Date datetime)
private Hotel hotel; {
private Date checkinDate; this.checkinDate = datetime;
private Date checkoutDate; }
private String creditCard;
private String creditCardName; @ManyToOne @NotNull
private int creditCardExpiryMonth; public Hotel getHotel()
private int creditCardExpiryYear; {
private boolean smoking; return hotel;
private int beds; }
public void setHotel(Hotel hotel)
public Booking() {} {
this.hotel = hotel;
public Booking(Hotel hotel, User user) }
{
this.hotel = hotel; @ManyToOne @NotNull
this.user = user; public User getUser()
} {
return user;
}
Tuesday, September 8, 2009

79. public int getBeds()
public void setUser(User user)
{
{
return beds;
this.user = user;
}
}
public void setBeds(int beds)
@Basic @Temporal(TemporalType.DATE)
{
@NotNull
this.beds = beds;
public Date getCheckoutDate()
}
{
@NotNull(message="Credit card name is required")
return checkoutDate;
@Length(min=3, max=70, message="Credit card name is required")
}
public String getCreditCardName()
public void setCheckoutDate(Date checkoutDate)
{
{
return creditCardName;
this.checkoutDate = checkoutDate;
}
}
public void setCreditCardName(String creditCardName)
@NotNull(message="Credit card number is required")
{
@Length(min=16, max=16, message="Credit card number must 16 digits long")
this.creditCardName = creditCardName;
@Pattern(regex="^d*$", message="Credit card number must be numeric")
}
public String getCreditCard()
{
public int getCreditCardExpiryMonth()
return creditCard;
{
}
return creditCardExpiryMonth;
}
public void setCreditCard(String creditCard)
{
public void setCreditCardExpiryMonth(int creditCardExpiryMonth)
this.creditCard = creditCard;
{
}
this.creditCardExpiryMonth = creditCardExpiryMonth;
}
@Transient
public String getDescription()
public int getCreditCardExpiryYear()
{
{
DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM);
return creditCardExpiryYear;
return hotel==null ? null : hotel.getName() +
}
", " + df.format( getCheckinDate() ) +
" to " + df.format( getCheckoutDate() );
public void setCreditCardExpiryYear(int creditCardExpiryYear)
}
{
this.creditCardExpiryYear = creditCardExpiryYear;
public boolean isSmoking()
}
{
return smoking;
@Override
}
public String toString()
{
public void setSmoking(boolean smoking)
return "Booking(" + user + ","+ hotel + ")";
{
}
this.smoking = smoking;
}
}
Tuesday, September 8, 2009

80. class Booking < ActiveRecord::Base
belongs_to :hotel
belongs_to :user
validates_presence_of :hotel
validates_presence_of :user
validates_presence_of :credit_card
validates_presence_of :credit_card_name
validates_length_of :credit_card, :within => 16..16
validates_format_of :credit_card, :with => /^d*$/
validates_length_of :credit_card_name, :within => 3..70
def total
hotel.price * nights
end
def nights
((checkout_date - checkin_date) / 1.day).round
end
def to_s
"Booking(#{user},#{hotel})"
end
end
Tuesday, September 8, 2009

81. class Booking < ActiveRecord::Base
belongs_to :hotel
belongs_to :user
validates_presence_of :hotel
validates_presence_of :user
validates_presence_of :credit_card
validates_presence_of :credit_card_name
validates_length_of :credit_card, :within => 16..16
validates_format_of :credit_card, :with => /^d*$/
validates_length_of :credit_card_name, :within => 3..70
def total
hotel.price * nights
end
def nights
((checkout_date - checkin_date) / 1.day).round
end
def to_s
"Booking(#{user},#{hotel})"
end
end
Tuesday, September 8, 2009

82. class CreateBookings < ActiveRecord::Migration
def self.up
create_table :bookings do |t|
t.references :user
t.references :hotel
t.datetime :checkin
t.datetime :checkout
t.string :credit_card
t.string :credit_card_name
t.integer :credit_card_expiry_month
t.integer :credit_card_expiry_year
t.boolean :smoking
t.integer :beds
t.timestamps
end
end
def self.down
drop_table :bookings
end
end
Tuesday, September 8, 2009

83. class CreateBookings < ActiveRecord::Migration
def self.up
create_table :bookings do |t|
t.references :user
t.references :hotel
t.datetime :checkin
t.datetime :checkout
t.string :credit_card
t.string :credit_card_name
t.integer :credit_card_expiry_month
t.integer :credit_card_expiry_year
t.boolean :smoking
t.integer :beds
t.timestamps
end
end
def self.down
drop_table :bookings
end
end
Tuesday, September 8, 2009

84. class CreateBookings < ActiveRecord::Migration
def self.up
create_table :bookings do |t|
t.references :user
t.references :hotel
t.datetime :checkin
t.datetime :checkout
t.string :credit_card
t.string :credit_card_name
t.integer :credit_card_expiry_month
t.integer :credit_card_expiry_year
t.boolean :smoking
t.integer :beds
t.timestamps
end
end
def self.down
drop_table :bookings
end
end
Tuesday, September 8, 2009

85. 190
vs
40
Tuesday, September 8, 2009

86. “Eles servem mais de 23 milhões de visitantes/mês. A conversão resultou em
20 mil linhas de Ruby em vez de 125 mil linhas de Java e, mais importante,
facilitou a dificuldade que tinham em manutenção. Eles também
finalizaram a reescrita do sistema em apenas 3 meses com 4 desenvolvedores.
Uma vez completo e otimizado, o site deles agora é mais rápido que antes.”
http://www.railsonwave.com/railsonwave/2008/6/4/yellowpages-com-migrates-to-rails
Tuesday, September 8, 2009

87. “Eles servem mais de 23 milhões de visitantes/mês. A conversão resultou em
20 mil linhas de Ruby em vez de 125 mil linhas de Java e, mais importante,
facilitou a dificuldade que tinham em manutenção. Eles também
finalizaram a reescrita do sistema em apenas 3 meses com 4 desenvolvedores.
Uma vez completo e otimizado, o site deles agora é mais rápido que antes.”
http://www.railsonwave.com/railsonwave/2008/6/4/yellowpages-com-migrates-to-rails
Tuesday, September 8, 2009

88. “Eles servem mais de 23 milhões de visitantes/mês. A conversão resultou em
20 mil linhas de Ruby em vez de 125 mil linhas de Java e, mais importante,
facilitou a dificuldade que tinham em manutenção. Eles também
finalizaram a reescrita do sistema em apenas 3 meses com 4 desenvolvedores.
Uma vez completo e otimizado, o site deles agora é mais rápido que antes.”
http://www.railsonwave.com/railsonwave/2008/6/4/yellowpages-com-migrates-to-rails
Tuesday, September 8, 2009

89. “Eles servem mais de 23 milhões de visitantes/mês. A conversão resultou em
20 mil linhas de Ruby em vez de 125 mil linhas de Java e, mais importante,
facilitou a dificuldade que tinham em manutenção. Eles também
finalizaram a reescrita do sistema em apenas 3 meses com 4 desenvolvedores.
Uma vez completo e otimizado, o site deles agora é mais rápido que antes.”
http://www.railsonwave.com/railsonwave/2008/6/4/yellowpages-com-migrates-to-rails
Tuesday, September 8, 2009

90. Ferramentas
Ágeis
Tuesday, September 8, 2009

91. Gitorious
Repositórios
Github
Integração Integrity
Contínua Cruise Control
Capistrano
Deployment
Puppet
Monitoramento New Relic
Tuesday, September 8, 2009

92. Gitorious
Repositórios
Github
Integração Integrity
Contínua Cruise Control
Capistrano
Deployment
Puppet
Monitoramento New Relic
Tuesday, September 8, 2009

93. Gitorious
Repositórios
Github
Integração Integrity
Contínua Cruise Control
Capistrano
Deployment
Puppet
Monitoramento New Relic
Tuesday, September 8, 2009

94. Gitorious
Repositórios
Github
Integração Integrity
Contínua Cruise Control
Capistrano
Deployment
Puppet
Monitoramento New Relic
Tuesday, September 8, 2009

95. Comunidade
Tuesday, September 8, 2009

96. peepcode.com
Geoffrey
Tuesday, September 8, 2009

97. railsenvy.com
Jason e Gregg
Tuesday, September 8, 2009

98. railscasts.com
Ryan Bates
Tuesday, September 8, 2009

99. rubylearning.org
Satish Talim
Tuesday, September 8, 2009

100. rubyinside.com.br
Peter Cooper
Tuesday, September 8, 2009

101. Tuesday, September 8, 2009

102. Tuesday, September 8, 2009

103. Tuesday, September 8, 2009

104. Tuesday, September 8, 2009

105. Tuesday, September 8, 2009

106. O que dizem
por aí ...
Tuesday, September 8, 2009

107. Pouco usado
Tuesday, September 8, 2009

108. Tuesday, September 8, 2009

109. Tuesday, September 8, 2009

110. Tuesday, September 8, 2009

111. Tuesday, September 8, 2009

112. Tuesday, September 8, 2009

113. Tuesday, September 8, 2009

114. Rails não Escala
Tuesday, September 8, 2009

115. Tuesday, September 8, 2009

116. Tuesday, September 8, 2009

117. Blaine Cook
http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter
Tuesday, September 8, 2009

118. Para colocar as coisas em
perspectiva, o Friendster foi
escrito em Java e eles
mudaram para PHP. MySpace
foi escrito em ColdFusion e
eles mudaram para ASP.NET.
Blaine Cook
http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter
Tuesday, September 8, 2009

119. Para colocar as coisas em
perspectiva, o Friendster foi
escrito em Java e eles
mudaram para PHP. MySpace
foi escrito em ColdFusion e
eles mudaram para ASP.NET.
Quando as pessoas caem em
problemas de escalabilidade,
normalmente acham que a
linguagem é o problema, mas
eu acho que isso raramente
é a realidade. Blaine Cook
http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter
Tuesday, September 8, 2009

120. “O The New York Times usou Ruby on Rails para
agregar, analizar e mostrar os resultados das
eleições em quase tempo real em um de seus
sites mais acessados de todos os tempos.”
http://www.computerworld.com.au/article/268003/ruby_rails_rolls_into_enterprise?fp=16&fpid=1
Tuesday, September 8, 2009

121. “O The New York Times usou Ruby on Rails para
agregar, analizar e mostrar os resultados das
eleições em quase tempo real em um de seus
sites mais acessados de todos os tempos.”
http://www.computerworld.com.au/article/268003/ruby_rails_rolls_into_enterprise?fp=16&fpid=1
Tuesday, September 8, 2009

122. Ruby é Lento
Tuesday, September 8, 2009

123. x mais lento que C++
Tuesday, September 8, 2009

124. x mais lento que C++
0
50
100
Python 2 150
Ruby 1.9 200
Perl
JRuby
Python 3
PHP
Ruby 1.8.6
Tuesday, September 8, 2009

125. Homepage: 331 ms
Tuesday, September 8, 2009

126. Homepage: 331 ms
Total: 5.45 s
Tuesday, September 8, 2009

127. Tuesday, September 8, 2009

128. Performance
!=
Escalabilidade
Tuesday, September 8, 2009

129. Outros Mitos?
Tuesday, September 8, 2009

130. Tuesday, September 8, 2009

131. Mais Produtivo
“Melhor”
Anti-legado
Tuesday, September 8, 2009

132. Mais Produtivo
“Melhor”
Anti-legado
Tuesday, September 8, 2009

133. Mais Produtivo
“Melhor”
Anti-legado
Tuesday, September 8, 2009

134. Agilidade
Tuesday, September 8, 2009

135. Tuesday, September 8, 2009

136. Robert C. Martin
Tuesday, September 8, 2009

137. “Uncle Bob”
Tuesday, September 8, 2009

138. Código Limpo
Tuesday, September 8, 2009

139. Tuesday, September 8, 2009

140. Test Driven
Development
Tuesday, September 8, 2009

141. Tuesday, September 8, 2009

142. describe BankAccount do
before :each do
@bank_account = BankAccount.new :balance => 250
end
it "should not be valid" do
@bank_account.should be_valid
end
it "should transfer funds successfully" do
@bank_account.should_receive(:transfer)
.with_args(:amount => 100)
.and_return(true)
@bank_account.execute_transaction(:amount => 100)
@bank_account.balance.should == 150
end
end
Tuesday, September 8, 2009

143. describe BankAccount do
before :each do
@bank_account = BankAccount.new :balance => 250
end
it "should not be valid" do
@bank_account.should be_valid
end
it "should transfer funds successfully" do
@bank_account.should_receive(:transfer)
.with_args(:amount => 100)
.and_return(true)
@bank_account.execute_transaction(:amount => 100)
@bank_account.balance.should == 150
end
end
Tuesday, September 8, 2009

144. describe BankAccount do
before :each do
@bank_account = BankAccount.new :balance => 250
end
it "should not be valid" do
@bank_account.should be_valid
end
it "should transfer funds successfully" do
@bank_account.should_receive(:transfer)
.with_args(:amount => 100)
.and_return(true)
@bank_account.execute_transaction(:amount => 100)
@bank_account.balance.should == 150
end
end
Tuesday, September 8, 2009

145. describe BankAccount do
before :each do
@bank_account = BankAccount.new :balance => 250
end
it "should not be valid" do
@bank_account.should be_valid
end
it "should transfer funds successfully" do
@bank_account.should_receive(:transfer)
.with_args(:amount => 100)
.and_return(true)
@bank_account.execute_transaction(:amount => 100)
@bank_account.balance.should == 150
end
end
Tuesday, September 8, 2009

146. Tuesday, September 8, 2009

147. Funcionalidade: Adição
Para evitar erros bobos
Como um péssimo matemático
Eu quero saber como somar dois números
Cenário: Adicionar dois números
Dado que eu digitei 50 na calculadora
E que eu digitei 70 na calculadora
Quando eu aperto o botão de soma
Então o resultado na calculadora deve ser 120
Tuesday, September 8, 2009

148. Funcionalidade: Adição
Para evitar erros bobos
Como um péssimo matemático
Eu quero saber como somar dois números
Cenário: Adicionar dois números
Dado que eu digitei 50 na calculadora
E que eu digitei 70 na calculadora
Quando eu aperto o botão de soma
Então o resultado na calculadora deve ser 120
Tuesday, September 8, 2009

149. Tuesday, September 8, 2009

150. Tuesday, September 8, 2009

151. Não é mais
demorado?
Tuesday, September 8, 2009

152. Cowboy Profissional
Tuesday, September 8, 2009

153. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

154. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

155. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

156. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

157. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

158. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

159. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

160. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

161. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

162. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

163. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

164. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

165. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

166. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

167. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

168. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

169. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

170. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

171. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

172. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

173. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

174. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

175. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

176. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

177. Cowboy Profissional
70.00
52.50
Produtividade
35.00
17.50
0
1 2 3 4 5 6 7 8 9 10 11 12
Tempo
Tuesday, September 8, 2009

178. Tuesday, September 8, 2009

179. Tuesday, September 8, 2009

180. 237 Equipes
137 Finalizadas
Tuesday, September 8, 2009

181. Tuesday, September 8, 2009

182. Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, September 8, 2009

183. Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, September 8, 2009

184. Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, September 8, 2009

185. Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, September 8, 2009

186. Profissionalismo
Tuesday, September 8, 2009

187. Tuesday, September 8, 2009

188. Obrigado!
akitaonrails.com
railssummit.com.br
Tuesday, September 8, 2009