Class | ActionController::IntegrationTest |
In: |
vendor/rails/actionpack/lib/action_controller/integration.rb
|
Parent: | Test::Unit::TestCase |
An IntegrationTest is one that spans multiple controllers and actions, tying them all together to ensure they work together as expected. It tests more completely than either unit or functional tests do, exercising the entire stack, from the dispatcher to the database.
At its simplest, you simply extend IntegrationTest and write your tests using the get/post methods:
require "#{File.dirname(__FILE__)}/test_helper" class ExampleTest < ActionController::IntegrationTest fixtures :people def test_login # get the login page get "/login" assert_equal 200, status # post the login and follow through to the home page post "/login", :username => people(:jamis).username, :password => people(:jamis).password follow_redirect! assert_equal 200, status assert_equal "/home", path end end
However, you can also have multiple session instances open per test, and even extend those instances with assertions and methods to create a very powerful testing DSL that is specific for your application. You can even reference any named routes you happen to have defined!
require "#{File.dirname(__FILE__)}/test_helper" class AdvancedTest < ActionController::IntegrationTest fixtures :people, :rooms def test_login_and_speak jamis, david = login(:jamis), login(:david) room = rooms(:office) jamis.enter(room) jamis.speak(room, "anybody home?") david.enter(room) david.speak(room, "hello!") end private module CustomAssertions def enter(room) # reference a named route, for maximum internal consistency! get(room_url(:id => room.id)) assert(...) ... end def speak(room, message) xml_http_request "/say/#{room.id}", :message => message assert(...) ... end end def login(who) open_session do |sess| sess.extend(CustomAssertions) who = people(who) sess.post "/login", :username => who.username, :password => who.password assert(...) end end end
Delegate unhandled messages to the current session instance.
# File vendor/rails/actionpack/lib/action_controller/integration.rb, line 542 542: def method_missing(sym, *args, &block) 543: reset! unless @integration_session 544: returning @integration_session.send(sym, *args, &block) do 545: copy_session_variables! 546: end 547: end
Open a new session instance. If a block is given, the new session is yielded to the block before being returned.
session = open_session do |sess| sess.extend(CustomAssertions) end
By default, a single session is automatically created for you, but you can use this method to open multiple sessions that ought to be tested simultaneously.
# File vendor/rails/actionpack/lib/action_controller/integration.rb, line 511 511: def open_session 512: session = Integration::Session.new 513: 514: # delegate the fixture accessors back to the test instance 515: extras = Module.new { attr_accessor :delegate, :test_result } 516: self.class.fixture_table_names.each do |table_name| 517: name = table_name.tr(".", "_") 518: next unless respond_to?(name) 519: extras.send(:define_method, name) { |*args| delegate.send(name, *args) } 520: end 521: 522: # delegate add_assertion to the test case 523: extras.send(:define_method, :add_assertion) { test_result.add_assertion } 524: session.extend(extras) 525: session.delegate = self 526: session.test_result = @_result 527: 528: yield session if block_given? 529: session 530: end