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require 'active_support/core_ext/hash/diff'
require 'active_support/core_ext/hash/indifferent_access'
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 <tt>path</tt> generates
# <tt>options</tt> and then that <tt>options</tt> generates <tt>path</tt>. 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 <tt>map.draw { map.connect ... }</tt>:
#
# 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
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