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