require 'active_support/core_ext/hash/diff' module ActionDispatch module Assertions # Suite of assertions to test routes generated by Rails and the handling of requests made to them. module RoutingAssertions # Asserts that the routing of the given +path+ was handled correctly and that the parsed options (given in the +expected_options+ hash) # match +path+. Basically, it asserts that Rails recognizes the route given by +expected_options+. # # Pass a hash in the second argument (+path+) to specify the request method. This is useful for routes # requiring a specific HTTP method. The hash should contain a :path with the incoming request path # and a :method containing the required HTTP verb. # # # assert that POSTing to /items will call the create action on ItemsController # assert_recognizes({:controller => 'items', :action => 'create'}, {:path => 'items', :method => :post}) # # You can also pass in +extras+ with a hash containing URL parameters that would normally be in the query string. This can be used # to assert that values in the query string string will end up in the params hash correctly. To test query strings you must use the # extras argument, appending the query string on the path directly will not work. For example: # # # assert that a path of '/items/list/1?view=print' returns the correct options # assert_recognizes({:controller => 'items', :action => 'list', :id => '1', :view => 'print'}, 'items/list/1', { :view => "print" }) # # The +message+ parameter allows you to pass in an error message that is displayed upon failure. # # ==== Examples # # Check the default route (i.e., the index action) # assert_recognizes({:controller => 'items', :action => 'index'}, 'items') # # # Test a specific action # assert_recognizes({:controller => 'items', :action => 'list'}, 'items/list') # # # Test an action with a parameter # assert_recognizes({:controller => 'items', :action => 'destroy', :id => '1'}, 'items/destroy/1') # # # Test a custom route # assert_recognizes({:controller => 'items', :action => 'show', :id => '1'}, 'view/item1') # # # Check a Simply RESTful generated route # assert_recognizes list_items_url, 'items/list' def assert_recognizes(expected_options, path, extras={}, message=nil) if path.is_a? Hash request_method = path[:method] path = path[:path] else request_method = nil end request = recognized_request_for(path, request_method) expected_options = expected_options.clone extras.each_key { |key| expected_options.delete key } unless extras.nil? expected_options.stringify_keys! routing_diff = expected_options.diff(request.path_parameters) msg = build_message(message, "The recognized options did not match , difference: ", request.path_parameters, expected_options, expected_options.diff(request.path_parameters)) assert_block(msg) { request.path_parameters == expected_options } end # Asserts that the provided options can be used to generate the provided path. This is the inverse of +assert_recognizes+. # The +extras+ parameter is used to tell the request the names and values of additional request parameters that would be in # a query string. The +message+ parameter allows you to specify a custom error message for assertion failures. # # The +defaults+ parameter is unused. # # ==== Examples # # Asserts that the default action is generated for a route with no action # assert_generates "/items", :controller => "items", :action => "index" # # # Tests that the list action is properly routed # assert_generates "/items/list", :controller => "items", :action => "list" # # # Tests the generation of a route with a parameter # assert_generates "/items/list/1", { :controller => "items", :action => "list", :id => "1" } # # # Asserts that the generated route gives us our custom route # assert_generates "changesets/12", { :controller => 'scm', :action => 'show_diff', :revision => "12" } def assert_generates(expected_path, options, defaults={}, extras = {}, message=nil) expected_path = "/#{expected_path}" unless expected_path[0] == ?/ # Load routes.rb if it hasn't been loaded. generated_path, extra_keys = @routes.generate_extras(options, defaults) found_extras = options.reject {|k, v| ! extra_keys.include? k} msg = build_message(message, "found extras , not ", found_extras, extras) assert_block(msg) { found_extras == extras } msg = build_message(message, "The generated path did not match ", generated_path, expected_path) assert_block(msg) { expected_path == generated_path } end # Asserts that path and options match both ways; in other words, it verifies that path generates # options and then that options generates path. This essentially combines +assert_recognizes+ # and +assert_generates+ into one step. # # The +extras+ hash allows you to specify options that would normally be provided as a query string to the action. The # +message+ parameter allows you to specify a custom error message to display upon failure. # # ==== Examples # # Assert a basic route: a controller with the default action (index) # assert_routing '/home', :controller => 'home', :action => 'index' # # # Test a route generated with a specific controller, action, and parameter (id) # assert_routing '/entries/show/23', :controller => 'entries', :action => 'show', :id => 23 # # # Assert a basic route (controller + default action), with an error message if it fails # assert_routing '/store', { :controller => 'store', :action => 'index' }, {}, {}, 'Route for store index not generated properly' # # # Tests a route, providing a defaults hash # assert_routing 'controller/action/9', {:id => "9", :item => "square"}, {:controller => "controller", :action => "action"}, {}, {:item => "square"} # # # Tests a route with a HTTP method # assert_routing({ :method => 'put', :path => '/product/321' }, { :controller => "product", :action => "update", :id => "321" }) def assert_routing(path, options, defaults={}, extras={}, message=nil) assert_recognizes(options, path, extras, message) controller, default_controller = options[:controller], defaults[:controller] if controller && controller.include?(?/) && default_controller && default_controller.include?(?/) options[:controller] = "/#{controller}" end assert_generates(path.is_a?(Hash) ? path[:path] : path, options, defaults, extras, message) end # A helper to make it easier to test different route configurations. # This method temporarily replaces @routes # with a new RouteSet instance. # # The new instance is yielded to the passed block. Typically the block # will create some routes using map.draw { map.connect ... }: # # with_routing do |set| # set.draw do |map| # map.connect ':controller/:action/:id' # assert_equal( # ['/content/10/show', {}], # map.generate(:controller => 'content', :id => 10, :action => 'show') # end # end # end # def with_routing old_routes, @routes = @routes, ActionDispatch::Routing::RouteSet.new old_controller, @controller = @controller, @controller.clone if @controller _routes = @routes # Unfortunately, there is currently an abstraction leak between AC::Base # and AV::Base which requires having the URL helpers in both AC and AV. # To do this safely at runtime for tests, we need to bump up the helper serial # to that the old AV subclass isn't cached. # # TODO: Make this unnecessary if @controller @controller.singleton_class.send(:include, _routes.url_helpers) @controller.view_context_class = Class.new(@controller.view_context_class) do include _routes.url_helpers end end yield @routes ensure @routes = old_routes if @controller @controller = old_controller end end # ROUTES TODO: These assertions should really work in an integration context def method_missing(selector, *args, &block) if @controller && @routes && @routes.named_routes.helpers.include?(selector) @controller.send(selector, *args, &block) else super end end private # Recognizes the route for a given path. def recognized_request_for(path, request_method = nil) path = "/#{path}" unless path.first == '/' # Assume given controller request = ActionController::TestRequest.new request.env["REQUEST_METHOD"] = request_method.to_s.upcase if request_method request.path = path params = @routes.recognize_path(path, { :method => request.method }) request.path_parameters = params.with_indifferent_access request end end end end