480 lines
16 KiB
Ruby
480 lines
16 KiB
Ruby
require 'stringio'
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require 'uri'
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require 'active_support/test_case'
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require 'rack/mock_session'
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require 'rack/test/cookie_jar'
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module ActionController
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module Integration #:nodoc:
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module RequestHelpers
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# Performs a GET request with the given parameters.
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#
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# - +path+: The URI (as a String) on which you want to perform a GET
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# request.
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# - +parameters+: The HTTP parameters that you want to pass. This may
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# be +nil+,
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# a Hash, or a String that is appropriately encoded
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# (<tt>application/x-www-form-urlencoded</tt> or
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# <tt>multipart/form-data</tt>).
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# - +headers+: Additional HTTP headers to pass, as a Hash. The keys will
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# automatically be upcased, with the prefix 'HTTP_' added if needed.
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#
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# This method returns an Response object, which one can use to
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# inspect the details of the response. Furthermore, if this method was
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# called from an ActionController::IntegrationTest object, then that
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# object's <tt>@response</tt> instance variable will point to the same
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# response object.
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#
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# You can also perform POST, PUT, DELETE, and HEAD requests with +post+,
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# +put+, +delete+, and +head+.
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def get(path, parameters = nil, headers = nil)
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process :get, path, parameters, headers
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end
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# Performs a POST request with the given parameters. See get() for more
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# details.
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def post(path, parameters = nil, headers = nil)
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process :post, path, parameters, headers
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end
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# Performs a PUT request with the given parameters. See get() for more
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# details.
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def put(path, parameters = nil, headers = nil)
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process :put, path, parameters, headers
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end
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# Performs a DELETE request with the given parameters. See get() for
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# more details.
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def delete(path, parameters = nil, headers = nil)
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process :delete, path, parameters, headers
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end
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# Performs a HEAD request with the given parameters. See get() for more
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# details.
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def head(path, parameters = nil, headers = nil)
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process :head, path, parameters, headers
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end
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# Performs an XMLHttpRequest request with the given parameters, mirroring
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# a request from the Prototype library.
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#
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# The request_method is :get, :post, :put, :delete or :head; the
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# parameters are +nil+, a hash, or a url-encoded or multipart string;
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# the headers are a hash. Keys are automatically upcased and prefixed
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# with 'HTTP_' if not already.
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def xml_http_request(request_method, path, parameters = nil, headers = nil)
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headers ||= {}
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headers['HTTP_X_REQUESTED_WITH'] = 'XMLHttpRequest'
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headers['HTTP_ACCEPT'] ||= [Mime::JS, Mime::HTML, Mime::XML, 'text/xml', Mime::ALL].join(', ')
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process(request_method, path, parameters, headers)
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end
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alias xhr :xml_http_request
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# Follow a single redirect response. If the last response was not a
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# redirect, an exception will be raised. Otherwise, the redirect is
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# performed on the location header.
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def follow_redirect!
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raise "not a redirect! #{status} #{status_message}" unless redirect?
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get(response.location)
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status
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end
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# Performs a request using the specified method, following any subsequent
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# redirect. Note that the redirects are followed until the response is
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# not a redirect--this means you may run into an infinite loop if your
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# redirect loops back to itself.
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def request_via_redirect(http_method, path, parameters = nil, headers = nil)
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process(http_method, path, parameters, headers)
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follow_redirect! while redirect?
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status
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end
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# Performs a GET request, following any subsequent redirect.
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# See +request_via_redirect+ for more information.
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def get_via_redirect(path, parameters = nil, headers = nil)
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request_via_redirect(:get, path, parameters, headers)
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end
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# Performs a POST request, following any subsequent redirect.
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# See +request_via_redirect+ for more information.
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def post_via_redirect(path, parameters = nil, headers = nil)
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request_via_redirect(:post, path, parameters, headers)
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end
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# Performs a PUT request, following any subsequent redirect.
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# See +request_via_redirect+ for more information.
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def put_via_redirect(path, parameters = nil, headers = nil)
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request_via_redirect(:put, path, parameters, headers)
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end
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# Performs a DELETE request, following any subsequent redirect.
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# See +request_via_redirect+ for more information.
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def delete_via_redirect(path, parameters = nil, headers = nil)
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request_via_redirect(:delete, path, parameters, headers)
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end
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end
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# An integration Session instance represents a set of requests and responses
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# performed sequentially by some virtual user. Because you can instantiate
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# multiple sessions and run them side-by-side, you can also mimic (to some
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# limited extent) multiple simultaneous users interacting with your system.
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#
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# Typically, you will instantiate a new session using
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# IntegrationTest#open_session, rather than instantiating
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# Integration::Session directly.
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class Session
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DEFAULT_HOST = "www.example.com"
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include Test::Unit::Assertions
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include ActionDispatch::Assertions
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include ActionController::TestProcess
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include RequestHelpers
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%w( status status_message headers body redirect? ).each do |method|
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delegate method, :to => :response, :allow_nil => true
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end
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%w( path ).each do |method|
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delegate method, :to => :request, :allow_nil => true
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end
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# The hostname used in the last request.
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attr_accessor :host
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# The remote_addr used in the last request.
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attr_accessor :remote_addr
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# The Accept header to send.
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attr_accessor :accept
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# A map of the cookies returned by the last response, and which will be
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# sent with the next request.
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def cookies
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@mock_session.cookie_jar
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end
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# A reference to the controller instance used by the last request.
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attr_reader :controller
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# A reference to the request instance used by the last request.
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attr_reader :request
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# A reference to the response instance used by the last request.
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attr_reader :response
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# A running counter of the number of requests processed.
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attr_accessor :request_count
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# Create and initialize a new Session instance.
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def initialize(app = nil)
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@app = app || ActionController::Dispatcher.new
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reset!
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end
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# Resets the instance. This can be used to reset the state information
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# in an existing session instance, so it can be used from a clean-slate
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# condition.
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#
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# session.reset!
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def reset!
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@https = false
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@mock_session = Rack::MockSession.new(@app, DEFAULT_HOST)
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@controller = @request = @response = nil
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@request_count = 0
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self.host = DEFAULT_HOST
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self.remote_addr = "127.0.0.1"
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self.accept = "text/xml,application/xml,application/xhtml+xml," +
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"text/html;q=0.9,text/plain;q=0.8,image/png," +
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"*/*;q=0.5"
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unless defined? @named_routes_configured
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# install the named routes in this session instance.
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klass = class << self; self; end
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Routing::Routes.install_helpers(klass)
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# the helpers are made protected by default--we make them public for
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# easier access during testing and troubleshooting.
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klass.module_eval { public *Routing::Routes.named_routes.helpers }
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@named_routes_configured = true
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end
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end
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# Specify whether or not the session should mimic a secure HTTPS request.
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#
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# session.https!
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# session.https!(false)
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def https!(flag = true)
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@https = flag
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end
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# Return +true+ if the session is mimicking a secure HTTPS request.
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#
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# if session.https?
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# ...
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# end
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def https?
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@https
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end
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# Set the host name to use in the next request.
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#
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# session.host! "www.example.com"
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def host!(name)
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@host = name
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end
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# Returns the URL for the given options, according to the rules specified
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# in the application's routes.
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def url_for(options)
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controller ?
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controller.url_for(options) :
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generic_url_rewriter.rewrite(options)
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end
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private
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# Performs the actual request.
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def process(method, path, parameters = nil, rack_environment = nil)
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if path =~ %r{://}
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location = URI.parse(path)
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https! URI::HTTPS === location if location.scheme
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host! location.host if location.host
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path = location.query ? "#{location.path}?#{location.query}" : location.path
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end
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[ControllerCapture, ActionController::ProcessWithTest].each do |mod|
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unless ActionController::Base < mod
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ActionController::Base.class_eval { include mod }
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end
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end
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opts = {
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:method => method,
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:params => parameters,
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"SERVER_NAME" => host,
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"SERVER_PORT" => (https? ? "443" : "80"),
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"HTTPS" => https? ? "on" : "off",
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"rack.url_scheme" => https? ? "https" : "http",
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"REQUEST_URI" => path,
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"PATH_INFO" => path,
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"HTTP_HOST" => host,
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"REMOTE_ADDR" => remote_addr,
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"CONTENT_TYPE" => "application/x-www-form-urlencoded",
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"HTTP_ACCEPT" => accept
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}
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env = Rack::MockRequest.env_for(path, opts)
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(rack_environment || {}).each do |key, value|
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env[key] = value
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end
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@controller = ActionController::Base.capture_instantiation do
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@mock_session.request(URI.parse(path), env)
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end
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@request_count += 1
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@request = ActionDispatch::Request.new(env)
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@response = ActionDispatch::TestResponse.from_response(@mock_session.last_response)
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@html_document = nil
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return response.status
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end
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# Get a temporary URL writer object
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def generic_url_rewriter
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env = {
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'REQUEST_METHOD' => "GET",
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'QUERY_STRING' => "",
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"REQUEST_URI" => "/",
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"HTTP_HOST" => host,
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"SERVER_PORT" => https? ? "443" : "80",
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"HTTPS" => https? ? "on" : "off"
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}
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UrlRewriter.new(ActionDispatch::Request.new(env), {})
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end
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end
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# A module used to extend ActionController::Base, so that integration tests
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# can capture the controller used to satisfy a request.
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module ControllerCapture #:nodoc:
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extend ActiveSupport::Concern
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included do
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alias_method_chain :initialize, :capture
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end
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def initialize_with_capture(*args)
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initialize_without_capture
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self.class.last_instantiation ||= self
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end
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module ClassMethods #:nodoc:
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mattr_accessor :last_instantiation
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def capture_instantiation
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self.last_instantiation = nil
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yield
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return last_instantiation
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end
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end
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end
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module Runner
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# Reset the current session. This is useful for testing multiple sessions
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# in a single test case.
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def reset!
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@integration_session = open_session
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end
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%w(get post put head delete cookies assigns
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xml_http_request xhr get_via_redirect post_via_redirect).each do |method|
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define_method(method) do |*args|
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reset! unless @integration_session
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# reset the html_document variable, but only for new get/post calls
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@html_document = nil unless %w(cookies assigns).include?(method)
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returning @integration_session.__send__(method, *args) do
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copy_session_variables!
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end
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end
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end
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# Open a new session instance. If a block is given, the new session is
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# yielded to the block before being returned.
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#
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# session = open_session do |sess|
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# sess.extend(CustomAssertions)
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# end
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#
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# By default, a single session is automatically created for you, but you
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# can use this method to open multiple sessions that ought to be tested
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# simultaneously.
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def open_session(app = nil)
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session = Integration::Session.new(app)
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# delegate the fixture accessors back to the test instance
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extras = Module.new { attr_accessor :delegate, :test_result }
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if self.class.respond_to?(:fixture_table_names)
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self.class.fixture_table_names.each do |table_name|
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name = table_name.tr(".", "_")
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next unless respond_to?(name)
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extras.__send__(:define_method, name) { |*args|
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delegate.send(name, *args)
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}
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end
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end
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# delegate add_assertion to the test case
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extras.__send__(:define_method, :add_assertion) {
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test_result.add_assertion
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}
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session.extend(extras)
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session.delegate = self
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session.test_result = @_result
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yield session if block_given?
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session
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end
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# Copy the instance variables from the current session instance into the
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# test instance.
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def copy_session_variables! #:nodoc:
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return unless @integration_session
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%w(controller response request).each do |var|
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instance_variable_set("@#{var}", @integration_session.__send__(var))
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end
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end
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# Delegate unhandled messages to the current session instance.
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def method_missing(sym, *args, &block)
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reset! unless @integration_session
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returning @integration_session.__send__(sym, *args, &block) do
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copy_session_variables!
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end
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end
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end
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end
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# An IntegrationTest is one that spans multiple controllers and actions,
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# tying them all together to ensure they work together as expected. It tests
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# more completely than either unit or functional tests do, exercising the
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# entire stack, from the dispatcher to the database.
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#
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# At its simplest, you simply extend IntegrationTest and write your tests
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# using the get/post methods:
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#
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# require "#{File.dirname(__FILE__)}/test_helper"
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#
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# class ExampleTest < ActionController::IntegrationTest
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# fixtures :people
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#
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# def test_login
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# # get the login page
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# get "/login"
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# assert_equal 200, status
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#
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# # post the login and follow through to the home page
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# post "/login", :username => people(:jamis).username,
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# :password => people(:jamis).password
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# follow_redirect!
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# assert_equal 200, status
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# assert_equal "/home", path
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# end
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# end
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#
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# However, you can also have multiple session instances open per test, and
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# even extend those instances with assertions and methods to create a very
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# powerful testing DSL that is specific for your application. You can even
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# reference any named routes you happen to have defined!
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#
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# require "#{File.dirname(__FILE__)}/test_helper"
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#
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# class AdvancedTest < ActionController::IntegrationTest
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# fixtures :people, :rooms
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#
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# def test_login_and_speak
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# jamis, david = login(:jamis), login(:david)
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# room = rooms(:office)
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#
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# jamis.enter(room)
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# jamis.speak(room, "anybody home?")
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#
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# david.enter(room)
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# david.speak(room, "hello!")
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# end
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#
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# private
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#
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# module CustomAssertions
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# def enter(room)
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# # reference a named route, for maximum internal consistency!
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# get(room_url(:id => room.id))
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# assert(...)
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# ...
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# end
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#
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# def speak(room, message)
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# xml_http_request "/say/#{room.id}", :message => message
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# assert(...)
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# ...
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# end
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# end
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#
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# def login(who)
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# open_session do |sess|
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# sess.extend(CustomAssertions)
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# who = people(who)
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# sess.post "/login", :username => who.username,
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# :password => who.password
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# assert(...)
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# end
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# end
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# end
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class IntegrationTest < ActiveSupport::TestCase
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include Integration::Runner
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end
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end
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