Suite of assertions to test routes generated by Rails and the handling of requests made to them.
Instance Public methods
assert_generates(expected_path, options, defaults = {}, extras = {}, message = nil) Link
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.
# 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" }
# File actionpack/lib/action_dispatch/testing/assertions/routing.rb, line 115 def assert_generates(expected_path, options, defaults = {}, extras = {}, message = nil) if expected_path.include?("://") fail_on(URI::InvalidURIError, message) do uri = URI.parse(expected_path) expected_path = uri.path.to_s.empty? ? "/" : uri.path end else expected_path = "/#{expected_path}" unless expected_path.start_with?("/") end options = options.clone generated_path, query_string_keys = @routes.generate_extras(options, defaults) found_extras = options.reject { |k, _| ! query_string_keys.include? k } msg = message || sprintf("found extras <%s>, not <%s>", found_extras, extras) assert_equal(extras, found_extras, msg) msg = message || sprintf("The generated path <%s> did not match <%s>", generated_path, expected_path) assert_equal(expected_path, generated_path, msg) end
assert_recognizes(expected_options, path, extras = {}, msg = nil) Link
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.
# Asserts 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 will end up in the params hash correctly. To test query strings you must use the extras argument because appending the query string on the path directly will not work. For example:
# Asserts 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.
# 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')
# File actionpack/lib/action_dispatch/testing/assertions/routing.rb, line 77 def assert_recognizes(expected_options, path, extras = {}, msg = nil) if path.is_a?(Hash) && path[:method].to_s == "all" [:get, :post, :put, :delete].each do |method| assert_recognizes(expected_options, path.merge(method: method), extras, msg) end else request = recognized_request_for(path, extras, msg) expected_options = expected_options.clone expected_options.stringify_keys! msg = message(msg, "") { sprintf("The recognized options <%s> did not match <%s>, difference:", request.path_parameters, expected_options) } assert_equal(expected_options, request.path_parameters, msg) end end
assert_routing(path, options, defaults = {}, extras = {}, message = nil) Link
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.
# Asserts 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
# Asserts 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 an HTTP method
assert_routing({ method: 'put', path: '/product/321' }, { controller: "product", action: "update", id: "321" })
# File actionpack/lib/action_dispatch/testing/assertions/routing.rb, line 158 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 generate_options = options.dup.delete_if { |k, _| defaults.key?(k) } assert_generates(path.is_a?(Hash) ? path[:path] : path, generate_options, defaults, extras, message) end
method_missing(selector, *args, &block) Link
ROUTES TODO: These assertions should really work in an integration context
# File actionpack/lib/action_dispatch/testing/assertions/routing.rb, line 191 def method_missing(selector, *args, &block) if defined?(@controller) && @controller && defined?(@routes) && @routes && @routes.named_routes.route_defined?(selector) @controller.public_send(selector, *args, &block) else super end end
with_routing(&block) Link
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 set.draw { match ... }
:
with_routing do |set|
set.draw do
resources :users
end
assert_equal "/users", users_path
end