563 lines
20 KiB
Ruby
563 lines
20 KiB
Ruby
require 'dispatcher'
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require 'stringio'
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require 'uri'
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require 'action_controller/test_process'
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module ActionController
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module Integration #:nodoc:
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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. Becase 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 IntegrationTest#open_session,
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# rather than instantiating Integration::Session directly.
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class Session
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include Test::Unit::Assertions
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include ActionController::Assertions
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include ActionController::TestProcess
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# The integer HTTP status code of the last request.
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attr_reader :status
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# The status message that accompanied the status code of the last request.
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attr_reader :status_message
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# The URI of the last request.
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attr_reader :path
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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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attr_reader :cookies
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# A map of the headers returned by the last response.
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attr_reader :headers
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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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# Create an initialize a new Session instance.
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def initialize
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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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@status = @path = @headers = nil
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@result = @status_message = nil
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@https = false
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@cookies = {}
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@controller = @request = @response = nil
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self.host = "www.example.com"
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self.remote_addr = "127.0.0.1"
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self.accept = "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"
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unless @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.named_routes.install(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.send(: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 mimicing 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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# 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(interpret_uri(headers['location'].first))
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status
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end
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# Performs a GET request, following any subsequent redirect. Note that
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# the redirects are followed until the response is not a redirect--this
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# means you may run into an infinite loop if your redirect loops back to
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# itself.
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def get_via_redirect(path, args={})
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get path, args
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follow_redirect! while redirect?
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status
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end
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# Performs a POST request, following any subsequent redirect. This is
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# vulnerable to infinite loops, the same as #get_via_redirect.
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def post_via_redirect(path, args={})
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post path, args
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follow_redirect! while redirect?
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status
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end
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# Returns +true+ if the last response was a redirect.
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def redirect?
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status/100 == 3
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end
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# Performs a GET request with the given parameters. The parameters may
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# be +nil+, a Hash, or a string that is appropriately encoded
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# (application/x-www-form-urlencoded or multipart/form-data). The headers
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# should be a hash. The keys will automatically be upcased, with the
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# prefix 'HTTP_' added if needed.
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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 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 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 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 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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#
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# This method used to omit the request_method parameter, assuming it
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# was :post. This was deprecated in Rails 1.2.4. Always pass the request
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# method as the first argument.
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def xml_http_request(request_method, path, parameters = nil, headers = nil)
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unless request_method.is_a?(Symbol)
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ActiveSupport::Deprecation.warn 'xml_http_request now takes the request_method (:get, :post, etc.) as the first argument. It used to assume :post, so add the :post argument to your existing method calls to silence this warning.'
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request_method, path, parameters, headers = :post, request_method, path, parameters
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end
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headers ||= {}
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headers['X-Requested-With'] = 'XMLHttpRequest'
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headers['Accept'] = 'text/javascript, text/html, application/xml, text/xml, */*'
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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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# 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 ? controller.url_for(options) : generic_url_rewriter.rewrite(options)
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end
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private
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class MockCGI < CGI #:nodoc:
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attr_accessor :stdinput, :stdoutput, :env_table
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def initialize(env, input=nil)
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self.env_table = env
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self.stdinput = StringIO.new(input || "")
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self.stdoutput = StringIO.new
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super()
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end
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end
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# Tailors the session based on the given URI, setting the HTTPS value
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# and the hostname.
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def interpret_uri(path)
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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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location.query ? "#{location.path}?#{location.query}" : location.path
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end
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# Performs the actual request.
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def process(method, path, parameters=nil, headers=nil)
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data = requestify(parameters)
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path = interpret_uri(path) if path =~ %r{://}
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path = "/#{path}" unless path[0] == ?/
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@path = path
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env = {}
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if method == :get
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env["QUERY_STRING"] = data
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data = nil
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end
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env.update(
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"REQUEST_METHOD" => method.to_s.upcase,
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"REQUEST_URI" => path,
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"HTTP_HOST" => host,
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"REMOTE_ADDR" => remote_addr,
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"SERVER_PORT" => (https? ? "443" : "80"),
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"CONTENT_TYPE" => "application/x-www-form-urlencoded",
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"CONTENT_LENGTH" => data ? data.length.to_s : nil,
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"HTTP_COOKIE" => encode_cookies,
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"HTTPS" => https? ? "on" : "off",
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"HTTP_ACCEPT" => accept
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)
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(headers || {}).each do |key, value|
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key = key.to_s.upcase.gsub(/-/, "_")
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key = "HTTP_#{key}" unless env.has_key?(key) || key =~ /^HTTP_/
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env[key] = value
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end
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unless ActionController::Base.respond_to?(:clear_last_instantiation!)
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ActionController::Base.send(:include, ControllerCapture)
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end
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ActionController::Base.clear_last_instantiation!
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cgi = MockCGI.new(env, data)
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Dispatcher.dispatch(cgi, ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS, cgi.stdoutput)
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@result = cgi.stdoutput.string
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@controller = ActionController::Base.last_instantiation
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@request = @controller.request
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@response = @controller.response
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# Decorate the response with the standard behavior of the TestResponse
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# so that things like assert_response can be used in integration
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# tests.
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@response.extend(TestResponseBehavior)
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@html_document = nil
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parse_result
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return status
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end
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# Parses the result of the response and extracts the various values,
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# like cookies, status, headers, etc.
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def parse_result
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headers, result_body = @result.split(/\r\n\r\n/, 2)
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@headers = Hash.new { |h,k| h[k] = [] }
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headers.each_line do |line|
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key, value = line.strip.split(/:\s*/, 2)
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@headers[key.downcase] << value
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end
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(@headers['set-cookie'] || [] ).each do |string|
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name, value = string.match(/^(.*?)=(.*?);/)[1,2]
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@cookies[name] = value
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end
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@status, @status_message = @headers["status"].first.split(/ /)
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@status = @status.to_i
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end
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# Encode the cookies hash in a format suitable for passing to a
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# request.
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def encode_cookies
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cookies.inject("") do |string, (name, value)|
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string << "#{name}=#{value}; "
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end
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end
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# Get a temporarly URL writer object
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def generic_url_rewriter
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cgi = MockCGI.new('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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ActionController::UrlRewriter.new(ActionController::CgiRequest.new(cgi), {})
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end
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def name_with_prefix(prefix, name)
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prefix ? "#{prefix}[#{name}]" : name.to_s
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end
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# Convert the given parameters to a request string. The parameters may
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# be a string, +nil+, or a Hash.
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def requestify(parameters, prefix=nil)
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if Hash === parameters
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return nil if parameters.empty?
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parameters.map { |k,v| requestify(v, name_with_prefix(prefix, k)) }.join("&")
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elsif Array === parameters
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parameters.map { |v| requestify(v, name_with_prefix(prefix, "")) }.join("&")
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elsif prefix.nil?
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parameters
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else
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"#{CGI.escape(prefix)}=#{CGI.escape(parameters.to_s)}"
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end
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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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def self.included(base)
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base.extend(ClassMethods)
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base.class_eval do
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class << self
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alias_method_chain :new, :capture
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end
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end
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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 clear_last_instantiation!
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self.last_instantiation = nil
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end
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def new_with_capture(*args)
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controller = new_without_capture(*args)
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self.last_instantiation ||= controller
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controller
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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 < Test::Unit::TestCase
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# Work around a bug in test/unit caused by the default test being named
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# as a symbol (:default_test), which causes regex test filters
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# (like "ruby test.rb -n /foo/") to fail because =~ doesn't work on
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# symbols.
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def initialize(name) #:nodoc:
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super(name.to_s)
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end
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# Work around test/unit's requirement that every subclass of TestCase have
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# at least one test method. Note that this implementation extends to all
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# subclasses, as well, so subclasses of IntegrationTest may also exist
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# without any test methods.
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def run(*args) #:nodoc:
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return if @method_name == "default_test"
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super
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end
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# Because of how use_instantiated_fixtures and use_transactional_fixtures
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# are defined, we need to treat them as special cases. Otherwise, users
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# would potentially have to set their values for both Test::Unit::TestCase
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# ActionController::IntegrationTest, since by the time the value is set on
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# TestCase, IntegrationTest has already been defined and cannot inherit
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# changes to those variables. So, we make those two attributes copy-on-write.
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class << self
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def use_transactional_fixtures=(flag) #:nodoc:
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@_use_transactional_fixtures = true
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@use_transactional_fixtures = flag
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end
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def use_instantiated_fixtures=(flag) #:nodoc:
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@_use_instantiated_fixtures = true
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@use_instantiated_fixtures = flag
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end
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def use_transactional_fixtures #:nodoc:
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@_use_transactional_fixtures ?
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@use_transactional_fixtures :
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superclass.use_transactional_fixtures
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end
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def use_instantiated_fixtures #:nodoc:
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@_use_instantiated_fixtures ?
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@use_instantiated_fixtures :
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superclass.use_instantiated_fixtures
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end
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end
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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 xml_http_request).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
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session = Integration::Session.new
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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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self.class.fixture_table_names.each do |table_name|
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name = table_name.tr(".", "_")
|
|
next unless respond_to?(name)
|
|
extras.send(:define_method, name) { |*args| delegate.send(name, *args) }
|
|
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
|