379 lines
18 KiB
Ruby
379 lines
18 KiB
Ruby
require 'test/unit'
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require 'test/unit/assertions'
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require 'rexml/document'
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require File.dirname(__FILE__) + "/vendor/html-scanner/html/document"
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module Test #:nodoc:
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module Unit #:nodoc:
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# In addition to these specific assertions, you also have easy access to various collections that the regular test/unit assertions
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# can be used against. These collections are:
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#
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# * assigns: Instance variables assigned in the action that are available for the view.
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# * session: Objects being saved in the session.
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# * flash: The flash objects currently in the session.
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# * cookies: Cookies being sent to the user on this request.
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#
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# These collections can be used just like any other hash:
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#
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# assert_not_nil assigns(:person) # makes sure that a @person instance variable was set
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# assert_equal "Dave", cookies[:name] # makes sure that a cookie called :name was set as "Dave"
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# assert flash.empty? # makes sure that there's nothing in the flash
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#
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# For historic reasons, the assigns hash uses string-based keys. So assigns[:person] won't work, but assigns["person"] will. To
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# appease our yearning for symbols, though, an alternative accessor has been deviced using a method call instead of index referencing.
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# So assigns(:person) will work just like assigns["person"], but again, assigns[:person] will not work.
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#
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# On top of the collections, you have the complete url that a given action redirected to available in redirect_to_url.
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#
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# For redirects within the same controller, you can even call follow_redirect and the redirect will be followed, triggering another
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# action call which can then be asserted against.
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#
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# == Manipulating the request collections
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#
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# The collections described above link to the response, so you can test if what the actions were expected to do happened. But
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# sometimes you also want to manipulate these collections in the incoming request. This is really only relevant for sessions
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# and cookies, though. For sessions, you just do:
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#
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# @request.session[:key] = "value"
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#
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# For cookies, you need to manually create the cookie, like this:
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#
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# @request.cookies["key"] = CGI::Cookie.new("key", "value")
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#
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# == Testing named routes
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#
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# If you're using named routes, they can be easily tested using the original named routes methods straight in the test case.
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# Example:
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#
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# assert_redirected_to page_url(:title => 'foo')
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module Assertions
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# Asserts that the response is one of the following types:
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#
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# * <tt>:success</tt>: Status code was 200
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# * <tt>:redirect</tt>: Status code was in the 300-399 range
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# * <tt>:missing</tt>: Status code was 404
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# * <tt>:error</tt>: Status code was in the 500-599 range
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#
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# You can also pass an explicit status code number as the type, like assert_response(501)
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def assert_response(type, message = nil)
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clean_backtrace do
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if [ :success, :missing, :redirect, :error ].include?(type) && @response.send("#{type}?")
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assert_block("") { true } # to count the assertion
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elsif type.is_a?(Fixnum) && @response.response_code == type
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assert_block("") { true } # to count the assertion
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else
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assert_block(build_message(message, "Expected response to be a <?>, but was <?>", type, @response.response_code)) { false }
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end
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end
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end
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# Assert that the redirection options passed in match those of the redirect called in the latest action. This match can be partial,
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# such that assert_redirected_to(:controller => "weblog") will also match the redirection of
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# redirect_to(:controller => "weblog", :action => "show") and so on.
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def assert_redirected_to(options = {}, message=nil)
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clean_backtrace do
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assert_response(:redirect, message)
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return true if options == @response.redirected_to
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ActionController::Routing::Routes.reload if ActionController::Routing::Routes.empty?
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begin
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url = {}
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original = { :expected => options, :actual => @response.redirected_to.dup }
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original.each do |key, value|
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if value.is_a?(Symbol)
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value = @controller.respond_to?(value, true) ? @controller.send(value) : @controller.send("hash_for_#{option}")
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end
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unless value.is_a?(Hash)
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request = case value
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when NilClass then nil
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when /^\w+:\/\// then recognized_request_for(%r{^(\w+://.*?(/|$|\?))(.*)$} =~ value ? $3 : nil)
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else recognized_request_for(value)
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end
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value = request.path_parameters if request
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end
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if value.is_a?(Hash) # stringify 2 levels of hash keys
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value.stringify_keys!
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value.values.select { |v| v.is_a?(Hash) }.collect { |v| v.stringify_keys! }
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if key == :expected && value['controller'] == @controller.controller_name && original[:actual].is_a?(Hash)
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original[:actual].stringify_keys!
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value.delete('controller') if original[:actual]['controller'].nil? || original[:actual]['controller'] == value['controller']
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end
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end
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if value.respond_to?(:[]) && value['controller']
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if key == :actual && value['controller'].first != '/'
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value['controller'] = ActionController::Routing.controller_relative_to(value['controller'], @controller.class.controller_path)
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end
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value['controller'] = value['controller'][1..-1] if value['controller'].first == '/' # strip leading hash
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end
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url[key] = value
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end
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@response_diff = url[:expected].diff(url[:actual]) if url[:actual]
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msg = build_message(message, "response is not a redirection to all of the options supplied (redirection is <?>), difference: <?>",
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url[:actual], @response_diff)
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assert_block(msg) do
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url[:expected].keys.all? do |k|
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if k == :controller then url[:expected][k] == ActionController::Routing.controller_relative_to(url[:actual][k], @controller.class.controller_path)
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else parameterize(url[:expected][k]) == parameterize(url[:actual][k])
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end
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end
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end
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rescue ActionController::RoutingError # routing failed us, so match the strings only.
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msg = build_message(message, "expected a redirect to <?>, found one to <?>", options, @response.redirect_url)
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url_regexp = %r{^(\w+://.*?(/|$|\?))(.*)$}
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eurl, epath, url, path = [options, @response.redirect_url].collect do |url|
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u, p = (url_regexp =~ url) ? [$1, $3] : [nil, url]
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[u, (p.first == '/') ? p : '/' + p]
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end.flatten
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assert_equal(eurl, url, msg) if eurl && url
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assert_equal(epath, path, msg) if epath && path
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end
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end
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end
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# Asserts that the request was rendered with the appropriate template file.
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def assert_template(expected = nil, message=nil)
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clean_backtrace do
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rendered = expected ? @response.rendered_file(!expected.include?('/')) : @response.rendered_file
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msg = build_message(message, "expecting <?> but rendering with <?>", expected, rendered)
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assert_block(msg) do
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if expected.nil?
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!@response.rendered_with_file?
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else
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expected == rendered
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end
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end
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end
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end
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# Asserts that the routing of the given path was handled correctly and that the parsed options match.
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#
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# assert_recognizes({:controller => 'items', :action => 'index'}, 'items')
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#
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# Pass a hash in the second argument to specify the request method. This is useful for routes
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# requiring a specific method.
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#
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# assert_recognizes({:controller => 'items', :action => 'create'}, {:path => 'items', :method => :post})
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#
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def assert_recognizes(expected_options, path, extras={}, message=nil)
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if path.is_a? Hash
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request_method = path[:method]
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path = path[:path]
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else
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request_method = nil
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end
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clean_backtrace do
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ActionController::Routing::Routes.reload if ActionController::Routing::Routes.empty?
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request = recognized_request_for(path, request_method)
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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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routing_diff = expected_options.diff(request.path_parameters)
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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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end
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# Asserts that the provided options can be used to generate the provided path.
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def assert_generates(expected_path, options, defaults={}, extras = {}, message=nil)
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clean_backtrace do
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expected_path = "/#{expected_path}" unless expected_path[0] == ?/
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# Load routes.rb if it hasn't been loaded.
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ActionController::Routing::Routes.reload if ActionController::Routing::Routes.empty?
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generated_path, extra_keys = ActionController::Routing::Routes.generate_extras(options, extras)
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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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end
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# Asserts that path and options match both ways; in other words, the URL generated from
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# options is the same as path, and also that the options recognized from path are the same as options
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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, options, defaults, extras, message)
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end
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# Asserts that there is a tag/node/element in the body of the response
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# that meets all of the given conditions. The +conditions+ parameter must
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# be a hash of any of the following keys (all are optional):
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#
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# * <tt>:tag</tt>: the node type must match the corresponding value
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# * <tt>:attributes</tt>: a hash. The node's attributes must match the
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# corresponding values in the hash.
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# * <tt>:parent</tt>: a hash. The node's parent must match the
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# corresponding hash.
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# * <tt>:child</tt>: a hash. At least one of the node's immediate children
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# must meet the criteria described by the hash.
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# * <tt>:ancestor</tt>: a hash. At least one of the node's ancestors must
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# meet the criteria described by the hash.
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# * <tt>:descendant</tt>: a hash. At least one of the node's descendants
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# must meet the criteria described by the hash.
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# * <tt>:sibling</tt>: a hash. At least one of the node's siblings must
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# meet the criteria described by the hash.
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# * <tt>:after</tt>: a hash. The node must be after any sibling meeting
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# the criteria described by the hash, and at least one sibling must match.
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# * <tt>:before</tt>: a hash. The node must be before any sibling meeting
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# the criteria described by the hash, and at least one sibling must match.
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# * <tt>:children</tt>: a hash, for counting children of a node. Accepts
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# the keys:
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# * <tt>:count</tt>: either a number or a range which must equal (or
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# include) the number of children that match.
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# * <tt>:less_than</tt>: the number of matching children must be less
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# than this number.
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# * <tt>:greater_than</tt>: the number of matching children must be
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# greater than this number.
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# * <tt>:only</tt>: another hash consisting of the keys to use
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# to match on the children, and only matching children will be
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# counted.
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# * <tt>:content</tt>: the textual content of the node must match the
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# given value. This will not match HTML tags in the body of a
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# tag--only text.
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#
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# Conditions are matched using the following algorithm:
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#
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# * if the condition is a string, it must be a substring of the value.
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# * if the condition is a regexp, it must match the value.
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# * if the condition is a number, the value must match number.to_s.
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# * if the condition is +true+, the value must not be +nil+.
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# * if the condition is +false+ or +nil+, the value must be +nil+.
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#
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# Usage:
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#
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# # assert that there is a "span" tag
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# assert_tag :tag => "span"
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#
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# # assert that there is a "span" tag with id="x"
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# assert_tag :tag => "span", :attributes => { :id => "x" }
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#
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# # assert that there is a "span" tag using the short-hand
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# assert_tag :span
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#
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# # assert that there is a "span" tag with id="x" using the short-hand
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# assert_tag :span, :attributes => { :id => "x" }
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#
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# # assert that there is a "span" inside of a "div"
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# assert_tag :tag => "span", :parent => { :tag => "div" }
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#
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# # assert that there is a "span" somewhere inside a table
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# assert_tag :tag => "span", :ancestor => { :tag => "table" }
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#
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# # assert that there is a "span" with at least one "em" child
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# assert_tag :tag => "span", :child => { :tag => "em" }
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#
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# # assert that there is a "span" containing a (possibly nested)
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# # "strong" tag.
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# assert_tag :tag => "span", :descendant => { :tag => "strong" }
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#
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# # assert that there is a "span" containing between 2 and 4 "em" tags
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# # as immediate children
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# assert_tag :tag => "span",
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# :children => { :count => 2..4, :only => { :tag => "em" } }
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#
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# # get funky: assert that there is a "div", with an "ul" ancestor
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# # and an "li" parent (with "class" = "enum"), and containing a
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# # "span" descendant that contains text matching /hello world/
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# assert_tag :tag => "div",
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# :ancestor => { :tag => "ul" },
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# :parent => { :tag => "li",
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# :attributes => { :class => "enum" } },
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# :descendant => { :tag => "span",
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# :child => /hello world/ }
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#
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# <strong>Please note</strong: #assert_tag and #assert_no_tag only work
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# with well-formed XHTML. They recognize a few tags as implicitly self-closing
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# (like br and hr and such) but will not work correctly with tags
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# that allow optional closing tags (p, li, td). <em>You must explicitly
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# close all of your tags to use these assertions.</em>
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def assert_tag(*opts)
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clean_backtrace do
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opts = opts.size > 1 ? opts.last.merge({ :tag => opts.first.to_s }) : opts.first
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tag = find_tag(opts)
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assert tag, "expected tag, but no tag found matching #{opts.inspect} in:\n#{@response.body.inspect}"
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end
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end
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# Identical to #assert_tag, but asserts that a matching tag does _not_
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# exist. (See #assert_tag for a full discussion of the syntax.)
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def assert_no_tag(*opts)
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clean_backtrace do
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opts = opts.size > 1 ? opts.last.merge({ :tag => opts.first.to_s }) : opts.first
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tag = find_tag(opts)
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assert !tag, "expected no tag, but found tag matching #{opts.inspect} in:\n#{@response.body.inspect}"
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end
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end
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# test 2 html strings to be equivalent, i.e. identical up to reordering of attributes
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def assert_dom_equal(expected, actual, message="")
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clean_backtrace do
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expected_dom = HTML::Document.new(expected).root
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actual_dom = HTML::Document.new(actual).root
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full_message = build_message(message, "<?> expected to be == to\n<?>.", expected_dom.to_s, actual_dom.to_s)
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assert_block(full_message) { expected_dom == actual_dom }
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end
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end
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# negated form of +assert_dom_equivalent+
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def assert_dom_not_equal(expected, actual, message="")
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clean_backtrace do
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expected_dom = HTML::Document.new(expected).root
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actual_dom = HTML::Document.new(actual).root
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full_message = build_message(message, "<?> expected to be != to\n<?>.", expected_dom.to_s, actual_dom.to_s)
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assert_block(full_message) { expected_dom != actual_dom }
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end
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end
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# ensures that the passed record is valid by active record standards. returns the error messages if not
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def assert_valid(record)
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clean_backtrace do
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assert record.valid?, record.errors.full_messages.join("\n")
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end
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end
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def clean_backtrace(&block)
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yield
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rescue AssertionFailedError => e
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path = File.expand_path(__FILE__)
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raise AssertionFailedError, e.message, e.backtrace.reject { |line| File.expand_path(line) =~ /#{path}/ }
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end
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private
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def recognized_request_for(path, request_method = nil)
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path = "/#{path}" unless path.first == '/'
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# Assume given controller
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request = ActionController::TestRequest.new({}, {}, nil)
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request.env["REQUEST_METHOD"] = request_method.to_s.upcase if request_method
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request.path = path
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ActionController::Routing::Routes.recognize(request)
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request
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end
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def parameterize(value)
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value.respond_to?(:to_param) ? value.to_param : value
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end
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end
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end
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end
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