require 'test/unit' require 'test/unit/assertions' require 'rexml/document' module Test #:nodoc: module Unit #:nodoc: # In addition to these specific assertions, you also have easy access to various collections that the regular test/unit assertions # can be used against. These collections are: # # * assigns: Instance variables assigned in the action that's available for the view. # * session: Objects being saved in the session. # * flash: The flash objects being currently in the session. # * cookies: Cookies being sent to the user on this request. # # These collections can be used just like any other hash: # # assert_not_nil assigns(:person) # makes sure that a @person instance variable was set # assert_equal "Dave", cookies[:name] # makes sure that a cookie called :name was set as "Dave" # assert flash.empty? # makes sure that there's nothing in the flash # # For historic reasons, the assigns hash uses string-based keys. So assigns[:person] won't work, but assigns["person"] will. To # appease our yearning for symbols, though, an alternative accessor has been deviced using a method call instead of index referencing. # So assigns(:person) will work just like assigns["person"], but again, assigns[:person] will not work. # # On top of the collections, you have the complete url that a given action redirected to available in redirect_to_url. # # For redirects within the same controller, you can even call follow_redirect and the redirect will be follow triggering another # action call which can then be asserted against. # # == Manipulating the request collections # # The collections described above link to the response, so you can test if what the actions were expected to do happen. But # some times you also want to manipulate these collections in the request coming in. This is really only relevant for sessions # and cookies, though. For sessions, you just do: # # @request.session[:key] = "value" # # For cookies, you need to manually create the cookie, like this: # # @request.cookies["key"] = CGI::Cookie.new("key", "value") # # == Testing named routes # # If you're using named routes, they can be easily tested using the original named routes methods straight in the test case. # Example: # # assert_redirected_to page_url(:title => 'foo') module Assertions # Asserts that the response is one of the following types: # # * :success: Status code was 200 # * :redirect: Status code was in the 300-399 range # * :missing: Status code was 404 # * :error: Status code was in the 500-599 range # # You can also pass an explicit status code number as the type, like assert_response(501) def assert_response(type, message = nil) if [ :success, :missing, :redirect, :error ].include?(type) && @response.send("#{type}?") assert_block("") { true } # to count the assertion elsif type.is_a?(Fixnum) && @response.response_code == type assert_block("") { true } # to count the assertion else assert_block(build_message(message, "Expected response to be a , but was ", type, @response.response_code)) { false } end end # Assert that the redirection options passed in match those of the redirect called in the latest action. This match can be partial, # such at assert_redirected_to(:controller => "weblog") will also match the redirection of # redirect_to(:controller => "weblog", :action => "show") and so on. def assert_redirected_to(options = {}, message=nil) assert_response(:redirect, message) if options.is_a?(String) msg = build_message(message, "expected a redirect to , found one to ", options, @response.redirect_url) url_regexp = %r{^(\w+://.*?(/|$|\?))(.*)$} eurl, epath, url, path = [options, @response.redirect_url].collect do |url| u, p = (url_regexp =~ url) ? [$1, $3] : [nil, url] [u, (p[0..0] == '/') ? p : '/' + p] end.flatten if eurl && url then assert_equal(eurl, url, msg) else assert_equal(epath, path, msg) end else msg = build_message(message, "response is not a redirection to all of the options supplied (redirection is )", @response.redirected_to || @response.redirect_url) assert_block(msg) do if options.is_a?(Symbol) @response.redirected_to == options else options.keys.all? do |k| if k == :controller then options[k] == ActionController::Routing.controller_relative_to(@response.redirected_to[k], @controller.class.controller_path) else options[k] == (@response.redirected_to[k].respond_to?(:to_param) ? @response.redirected_to[k].to_param : @response.redirected_to[k] unless @response.redirected_to[k].nil?) end end end end end end # Asserts that the request was rendered with the appropriate template file. def assert_template(expected = nil, message=nil) rendered = expected ? @response.rendered_file(!expected.include?('/')) : @response.rendered_file msg = build_message(message, "expecting but rendering with ", expected, rendered) assert_block(msg) do if expected.nil? !@response.rendered_with_file? else expected == rendered end end end # Asserts that the routing of the given path is handled correctly and that the parsed options match. def assert_recognizes(expected_options, path, extras={}, message=nil) path = "/#{path}" unless path[0..0] == '/' # Load routes.rb if it hasn't been loaded. ActionController::Routing::Routes.reload if ActionController::Routing::Routes.empty? # Assume given controller request = ActionController::TestRequest.new({}, {}, nil) request.path = path ActionController::Routing::Routes.recognize!(request) expected_options = expected_options.clone extras.each_key { |key| expected_options.delete key } unless extras.nil? expected_options.stringify_keys! msg = build_message(message, "The recognized options did not match ", request.path_parameters, expected_options) assert_block(msg) { request.path_parameters == expected_options } end # Asserts that the provided options can be used to generate the provided path. 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. ActionController::Routing::Routes.reload if ActionController::Routing::Routes.empty? # Assume given controller request = ActionController::TestRequest.new({}, {}, nil) request.path_parameters = (defaults or {}).clone request.path_parameters[:controller] ||= options[:controller] generated_path, found_extras = ActionController::Routing::Routes.generate(options, request) 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, the URL generated from # options is same as path, and also that the options recognized from path are same as options def assert_routing(path, options, defaults={}, extras={}, message=nil) assert_recognizes(options, path, extras, message) assert_generates(path, options, defaults, extras, message) end # Asserts that there is a tag/node/element in the body of the response # that meets all of the given conditions. The +conditions+ parameter must # be a hash of any of the following keys (all are optional): # # * :tag: the node type must match the corresponding value # * :attributes: a hash. The node's attributes must match the # corresponding values in the hash. # * :parent: a hash. The node's parent must match the # corresponding hash. # * :child: a hash. At least one of the node's immediate children # must meet the criteria described by the hash. # * :ancestor: a hash. At least one of the node's ancestors must # meet the criteria described by the hash. # * :descendant: a hash. At least one of the node's descendants # must meet the criteria described by the hash. # * :sibling: a hash. At least one of the node's siblings must # meet the criteria described by the hash. # * :after: a hash. The node must be after any sibling meeting # the criteria described by the hash, and at least one sibling must match. # * :before: a hash. The node must be before any sibling meeting # the criteria described by the hash, and at least one sibling must match. # * :children: a hash, for counting children of a node. Accepts # the keys: # * :count: either a number or a range which must equal (or # include) the number of children that match. # * :less_than: the number of matching children must be less # than this number. # * :greater_than: the number of matching children must be # greater than this number. # * :only: another hash consisting of the keys to use # to match on the children, and only matching children will be # counted. # * :content: the textual content of the node must match the # given value. This will not match HTML tags in the body of a # tag--only text. # # Conditions are matched using the following algorithm: # # * if the condition is a string, it must be a substring of the value. # * if the condition is a regexp, it must match the value. # * if the condition is a number, the value must match number.to_s. # * if the condition is +true+, the value must not be +nil+. # * if the condition is +false+ or +nil+, the value must be +nil+. # # Usage: # # # assert that there is a "span" tag # assert_tag :tag => "span" # # # assert that there is a "span" inside of a "div" # assert_tag :tag => "span", :parent => { :tag => "div" } # # # assert that there is a "span" somewhere inside a table # assert_tag :tag => "span", :ancestor => { :tag => "table" } # # # assert that there is a "span" with at least one "em" child # assert_tag :tag => "span", :child => { :tag => "em" } # # # assert that there is a "span" containing a (possibly nested) # # "strong" tag. # assert_tag :tag => "span", :descendant => { :tag => "strong" } # # # assert that there is a "span" containing between 2 and 4 "em" tags # # as immediate children # assert_tag :tag => "span", # :children => { :count => 2..4, :only => { :tag => "em" } } # # # get funky: assert that there is a "div", with an "ul" ancestor # # and an "li" parent (with "class" = "enum"), and containing a # # "span" descendant that contains text matching /hello world/ # assert_tag :tag => "div", # :ancestor => { :tag => "ul" }, # :parent => { :tag => "li", # :attributes => { :class => "enum" } }, # :descendant => { :tag => "span", # :child => /hello world/ } def assert_tag(opts) tag = find_tag(opts) assert tag, "expected tag, but no tag found matching #{opts.inspect} in:\n#{@response.body.inspect}" end # Identical to #assert_tag, but asserts that a matching tag does _not_ # exist. (See #assert_tag for a full discussion of the syntax.) def assert_no_tag(opts) tag = find_tag(opts) assert !tag, "expected no tag, but found tag matching #{opts.inspect} in:\n#{@response.body.inspect}" end end end end