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require 'stringio'
require 'uri'
require 'active_support/test_case'
require 'active_support/core_ext/object/metaclass'
require 'rack/mock_session'
require 'rack/test/cookie_jar'
module ActionController
module Integration #:nodoc:
module RequestHelpers
# Performs a GET request with the given parameters.
#
# - +path+: The URI (as a String) on which you want to perform a GET
# request.
# - +parameters+: The HTTP parameters that you want to pass. This may
# be +nil+,
# a Hash, or a String that is appropriately encoded
# (<tt>application/x-www-form-urlencoded</tt> or
# <tt>multipart/form-data</tt>).
# - +headers+: Additional HTTP headers to pass, as a Hash. The keys will
# automatically be upcased, with the prefix 'HTTP_' added if needed.
#
# This method returns an Response object, which one can use to
# inspect the details of the response. Furthermore, if this method was
# called from an ActionController::IntegrationTest object, then that
# object's <tt>@response</tt> instance variable will point to the same
# response object.
#
# You can also perform POST, PUT, DELETE, and HEAD requests with +post+,
# +put+, +delete+, and +head+.
def get(path, parameters = nil, headers = nil)
process :get, path, parameters, headers
end
# Performs a POST request with the given parameters. See get() for more
# details.
def post(path, parameters = nil, headers = nil)
process :post, path, parameters, headers
end
# Performs a PUT request with the given parameters. See get() for more
# details.
def put(path, parameters = nil, headers = nil)
process :put, path, parameters, headers
end
# Performs a DELETE request with the given parameters. See get() for
# more details.
def delete(path, parameters = nil, headers = nil)
process :delete, path, parameters, headers
end
# Performs a HEAD request with the given parameters. See get() for more
# details.
def head(path, parameters = nil, headers = nil)
process :head, path, parameters, headers
end
# Performs an XMLHttpRequest request with the given parameters, mirroring
# a request from the Prototype library.
#
# The request_method is :get, :post, :put, :delete or :head; the
# parameters are +nil+, a hash, or a url-encoded or multipart string;
# the headers are a hash. Keys are automatically upcased and prefixed
# with 'HTTP_' if not already.
def xml_http_request(request_method, path, parameters = nil, headers = nil)
headers ||= {}
headers['HTTP_X_REQUESTED_WITH'] = 'XMLHttpRequest'
headers['HTTP_ACCEPT'] ||= [Mime::JS, Mime::HTML, Mime::XML, 'text/xml', Mime::ALL].join(', ')
process(request_method, path, parameters, headers)
end
alias xhr :xml_http_request
# Follow a single redirect response. If the last response was not a
# redirect, an exception will be raised. Otherwise, the redirect is
# performed on the location header.
def follow_redirect!
raise "not a redirect! #{status} #{status_message}" unless redirect?
get(response.location)
status
end
# Performs a request using the specified method, following any subsequent
# redirect. Note that the redirects are followed until the response is
# not a redirect--this means you may run into an infinite loop if your
# redirect loops back to itself.
def request_via_redirect(http_method, path, parameters = nil, headers = nil)
process(http_method, path, parameters, headers)
follow_redirect! while redirect?
status
end
# Performs a GET request, following any subsequent redirect.
# See +request_via_redirect+ for more information.
def get_via_redirect(path, parameters = nil, headers = nil)
request_via_redirect(:get, path, parameters, headers)
end
# Performs a POST request, following any subsequent redirect.
# See +request_via_redirect+ for more information.
def post_via_redirect(path, parameters = nil, headers = nil)
request_via_redirect(:post, path, parameters, headers)
end
# Performs a PUT request, following any subsequent redirect.
# See +request_via_redirect+ for more information.
def put_via_redirect(path, parameters = nil, headers = nil)
request_via_redirect(:put, path, parameters, headers)
end
# Performs a DELETE request, following any subsequent redirect.
# See +request_via_redirect+ for more information.
def delete_via_redirect(path, parameters = nil, headers = nil)
request_via_redirect(:delete, path, parameters, headers)
end
end
# An integration Session instance represents a set of requests and responses
# performed sequentially by some virtual user. Because you can instantiate
# multiple sessions and run them side-by-side, you can also mimic (to some
# limited extent) multiple simultaneous users interacting with your system.
#
# Typically, you will instantiate a new session using
# IntegrationTest#open_session, rather than instantiating
# Integration::Session directly.
class Session
DEFAULT_HOST = "www.example.com"
include Test::Unit::Assertions
include ActionDispatch::Assertions
include ActionController::TestProcess
include RequestHelpers
%w( status status_message headers body redirect? ).each do |method|
delegate method, :to => :response, :allow_nil => true
end
%w( path ).each do |method|
delegate method, :to => :request, :allow_nil => true
end
# The hostname used in the last request.
attr_accessor :host
# The remote_addr used in the last request.
attr_accessor :remote_addr
# The Accept header to send.
attr_accessor :accept
# A map of the cookies returned by the last response, and which will be
# sent with the next request.
def cookies
@mock_session.cookie_jar
end
# A reference to the controller instance used by the last request.
attr_reader :controller
# A reference to the request instance used by the last request.
attr_reader :request
# A reference to the response instance used by the last request.
attr_reader :response
# A running counter of the number of requests processed.
attr_accessor :request_count
# Create and initialize a new Session instance.
def initialize(app = nil)
@app = app || ActionController::Dispatcher.new
reset!
end
# Resets the instance. This can be used to reset the state information
# in an existing session instance, so it can be used from a clean-slate
# condition.
#
# session.reset!
def reset!
@https = false
@mock_session = Rack::MockSession.new(@app, DEFAULT_HOST)
@controller = @request = @response = nil
@request_count = 0
self.host = DEFAULT_HOST
self.remote_addr = "127.0.0.1"
self.accept = "text/xml,application/xml,application/xhtml+xml," +
"text/html;q=0.9,text/plain;q=0.8,image/png," +
"*/*;q=0.5"
unless defined? @named_routes_configured
# install the named routes in this session instance.
klass = metaclass
Routing::Routes.install_helpers(klass)
# the helpers are made protected by default--we make them public for
# easier access during testing and troubleshooting.
klass.module_eval { public *Routing::Routes.named_routes.helpers }
@named_routes_configured = true
end
end
# Specify whether or not the session should mimic a secure HTTPS request.
#
# session.https!
# session.https!(false)
def https!(flag = true)
@https = flag
end
# Return +true+ if the session is mimicking a secure HTTPS request.
#
# if session.https?
# ...
# end
def https?
@https
end
# Set the host name to use in the next request.
#
# session.host! "www.example.com"
def host!(name)
@host = name
end
# Returns the URL for the given options, according to the rules specified
# in the application's routes.
def url_for(options)
controller ?
controller.url_for(options) :
generic_url_rewriter.rewrite(options)
end
private
# Performs the actual request.
def process(method, path, parameters = nil, rack_environment = nil)
if path =~ %r{://}
location = URI.parse(path)
https! URI::HTTPS === location if location.scheme
host! location.host if location.host
path = location.query ? "#{location.path}?#{location.query}" : location.path
end
[ControllerCapture, ActionController::Testing].each do |mod|
unless ActionController::Base < mod
ActionController::Base.class_eval { include mod }
end
end
opts = {
:method => method,
:params => parameters,
"SERVER_NAME" => host,
"SERVER_PORT" => (https? ? "443" : "80"),
"HTTPS" => https? ? "on" : "off",
"rack.url_scheme" => https? ? "https" : "http",
"REQUEST_URI" => path,
"PATH_INFO" => path,
"HTTP_HOST" => host,
"REMOTE_ADDR" => remote_addr,
"CONTENT_TYPE" => "application/x-www-form-urlencoded",
"HTTP_ACCEPT" => accept
}
env = Rack::MockRequest.env_for(path, opts)
(rack_environment || {}).each do |key, value|
env[key] = value
end
@controller = ActionController::Base.capture_instantiation do
@mock_session.request(URI.parse(path), env)
end
@request_count += 1
@request = ActionDispatch::Request.new(env)
@response = ActionDispatch::TestResponse.from_response(@mock_session.last_response)
@html_document = nil
return response.status
end
# Get a temporary URL writer object
def generic_url_rewriter
env = {
'REQUEST_METHOD' => "GET",
'QUERY_STRING' => "",
"REQUEST_URI" => "/",
"HTTP_HOST" => host,
"SERVER_PORT" => https? ? "443" : "80",
"HTTPS" => https? ? "on" : "off"
}
UrlRewriter.new(ActionDispatch::Request.new(env), {})
end
end
# A module used to extend ActionController::Base, so that integration tests
# can capture the controller used to satisfy a request.
module ControllerCapture #:nodoc:
extend ActiveSupport::Concern
included do
alias_method_chain :initialize, :capture
end
def initialize_with_capture(*args)
initialize_without_capture
self.class.last_instantiation ||= self
end
module ClassMethods #:nodoc:
mattr_accessor :last_instantiation
def capture_instantiation
self.last_instantiation = nil
yield
return last_instantiation
end
end
end
module Runner
# Reset the current session. This is useful for testing multiple sessions
# in a single test case.
def reset!
@integration_session = open_session
end
%w(get post put head delete cookies assigns
xml_http_request xhr get_via_redirect post_via_redirect).each do |method|
define_method(method) do |*args|
reset! unless @integration_session
# reset the html_document variable, but only for new get/post calls
@html_document = nil unless %w(cookies assigns).include?(method)
returning @integration_session.__send__(method, *args) do
copy_session_variables!
end
end
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.
def open_session(app = nil)
session = Integration::Session.new(app)
# delegate the fixture accessors back to the test instance
extras = Module.new { attr_accessor :delegate, :test_result }
if self.class.respond_to?(:fixture_table_names)
self.class.fixture_table_names.each do |table_name|
name = table_name.tr(".", "_")
next unless respond_to?(name)
extras.__send__(:define_method, name) { |*args|
delegate.send(name, *args)
}
end
end
# delegate add_assertion to the test case
extras.__send__(:define_method, :add_assertion) {
test_result.add_assertion
}
session.extend(extras)
session.delegate = self
session.test_result = @_result
yield session if block_given?
session
end
# Copy the instance variables from the current session instance into the
# test instance.
def copy_session_variables! #:nodoc:
return unless @integration_session
%w(controller response request).each do |var|
instance_variable_set("@#{var}", @integration_session.__send__(var))
end
end
# Delegate unhandled messages to the current session instance.
def method_missing(sym, *args, &block)
reset! unless @integration_session
returning @integration_session.__send__(sym, *args, &block) do
copy_session_variables!
end
end
end
end
# 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
class IntegrationTest < ActiveSupport::TestCase
include Integration::Runner
end
end
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