The document outlines the steps taken to build a basic Rails application that displays a list of users. It creates sample users, generates the necessary model, controller and view files, adds tests for each component, and confirms the users are displayed as expected. The application is tested at each step of the development process.

30. scenario 'List of users' do
create_user 'mary'
create_user 'paul'
visit users_page
assert page.has_content?('mary')
assert page.has_content?('paul')
end

31. scenario 'List of users' do
create_user 'mary'
create_user 'paul'
visit users_page
assert page.has_content?('mary')
assert page.has_content?('paul')
end

32. $ rails g model User name:string

33. scenario 'List of users' do
create_user 'mary'
create_user 'paul'
visit users_page
assert page.has_content?('mary')
assert page.has_content?('paul')
end

34. $ rails g controller users index

35. scenario 'List of users' do
create_user 'mary'
create_user 'paul'
visit users_page
assert page.has_content?('mary')
assert page.has_content?('paul')
end

38. describe 'users/index.html.erb' do
it 'renders the list of users' do
render_view :users => [mock(:name => 'Joe')]
assert_contains rendered, 'Joe'
end
end

39. describe 'users/index.html.erb' do
it 'renders the list of users' do
render_view :users => [mock(:name => 'Joe')]
assert_contains rendered, 'Joe'
end
end

40. describe 'users/index.html.erb' do
it 'renders the list of users' do
render_view :users => [mock(:name => 'Joe')]
assert_contains rendered, 'Joe'
end
end

42. <h2>Users</h2>
<ul>
<%= @users.each do |user| %>
<li>
<%= user.name %>
</li>
<% end %>
</ul>

43. <h2>Users</h2>
<ul>
<%= @users.each do |user| %>
<li>
<%= user.name %>
</li>
<% end %>
</ul>

44. <h2>Users</h2>
<ul>
<%= @users.each do |user| %>
<li>
<%= user.name %>
</li>
<% end %>
</ul>

47. scenario 'List of users' do
create_user 'mary'
create_user 'paul'
visit users_page
assert page.has_content?('mary')
assert page.has_content?('paul')
end

50. describe UsersController do
describe 'GET index' do
it 'assigns the users' do
User.stub(:all => users_stub)
get :index
assert_equal users_stub, assigns[:user]
end
end
end

51. describe UsersController do
describe 'GET index' do
it 'assigns the users' do
User.stub(:all => users_stub)
get :index
assert_equal users_stub, assigns[:user]
end
end
end

52. describe UsersController do
describe 'GET index' do
it 'assigns the users' do
User.stub(:all => users_stub)
get :index
assert_equal users_stub, assigns[:user]
end
end
end

53. describe UsersController do
describe 'GET index' do
it 'assigns the users' do
User.stub(:all => users_stub)
get :index
assert_equal users_stub, assigns[:user]
end
end
end

55. class UsersController
def index
@users = User.all
end
end

56. class UsersController
def index
@users = User.all
end
end

59. scenario 'List of users' do
create_user 'mary'
create_user 'paul'
visit users_page
assert page.has_content?('mary')
assert page.has_content?('paul')
end