aboutsummaryrefslogtreecommitdiffstats
path: root/actionview/lib/action_view/test_case.rb
blob: 3eb1ac08264236e41f568e728ebf21085ebb570b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
require "active_support/core_ext/module/remove_method"
require "action_controller"
require "action_controller/test_case"
require "action_view"

require "rails-dom-testing"

module ActionView
  # = Action View Test Case
  class TestCase < ActiveSupport::TestCase
    class TestController < ActionController::Base
      include ActionDispatch::TestProcess

      attr_accessor :request, :response, :params

      class << self
        attr_writer :controller_path
      end

      def controller_path=(path)
        self.class.controller_path=(path)
      end

      def initialize
        super
        self.class.controller_path = ""
        @request = ActionController::TestRequest.create(self.class)
        @response = ActionDispatch::TestResponse.new

        @request.env.delete("PATH_INFO")
        @params = ActionController::Parameters.new
      end
    end

    module Behavior
      extend ActiveSupport::Concern

      include ActionDispatch::Assertions, ActionDispatch::TestProcess
      include Rails::Dom::Testing::Assertions
      include ActionController::TemplateAssertions
      include ActionView::Context

      include ActionDispatch::Routing::PolymorphicRoutes

      include AbstractController::Helpers
      include ActionView::Helpers
      include ActionView::RecordIdentifier
      include ActionView::RoutingUrlFor

      include ActiveSupport::Testing::ConstantLookup

      delegate :lookup_context, to: :controller
      attr_accessor :controller, :output_buffer, :rendered

      module ClassMethods
        def tests(helper_class)
          case helper_class
          when String, Symbol
            self.helper_class = "#{helper_class.to_s.underscore}_helper".camelize.safe_constantize
          when Module
            self.helper_class = helper_class
          end
        end

        def determine_default_helper_class(name)
          determine_constant_from_test_name(name) do |constant|
            Module === constant && !(Class === constant)
          end
        end

        def helper_method(*methods)
          # Almost a duplicate from ActionController::Helpers
          methods.flatten.each do |method|
            _helpers.module_eval <<-end_eval
              def #{method}(*args, &block)                    # def current_user(*args, &block)
                _test_case.send(%(#{method}), *args, &block)  #   _test_case.send(%(current_user), *args, &block)
              end                                             # end
            end_eval
          end
        end

        attr_writer :helper_class

        def helper_class
          @helper_class ||= determine_default_helper_class(name)
        end

        def new(*)
          include_helper_modules!
          super
        end

      private

        def include_helper_modules!
          helper(helper_class) if helper_class
          include _helpers
        end
      end

      def setup_with_controller
        @controller = ActionView::TestCase::TestController.new
        @request = @controller.request
        # empty string ensures buffer has UTF-8 encoding as
        # new without arguments returns ASCII-8BIT encoded buffer like String#new
        @output_buffer = ActiveSupport::SafeBuffer.new ""
        @rendered = ""

        make_test_case_available_to_view!
        say_no_to_protect_against_forgery!
      end

      def config
        @controller.config if @controller.respond_to?(:config)
      end

      def render(options = {}, local_assigns = {}, &block)
        view.assign(view_assigns)
        @rendered << output = view.render(options, local_assigns, &block)
        output
      end

      def rendered_views
        @_rendered_views ||= RenderedViewsCollection.new
      end

      # Need to experiment if this priority is the best one: rendered => output_buffer
      class RenderedViewsCollection
        def initialize
          @rendered_views ||= Hash.new { |hash, key| hash[key] = [] }
        end

        def add(view, locals)
          @rendered_views[view] ||= []
          @rendered_views[view] << locals
        end

        def locals_for(view)
          @rendered_views[view]
        end

        def rendered_views
          @rendered_views.keys
        end

        def view_rendered?(view, expected_locals)
          locals_for(view).any? do |actual_locals|
            expected_locals.all? { |key, value| value == actual_locals[key] }
          end
        end
      end

      included do
        setup :setup_with_controller
        ActiveSupport.run_load_hooks(:action_view_test_case, self)
      end

    private

      # Need to experiment if this priority is the best one: rendered => output_buffer
      def document_root_element
        Nokogiri::HTML::Document.parse(@rendered.blank? ? @output_buffer : @rendered).root
      end

      def say_no_to_protect_against_forgery!
        _helpers.module_eval do
          remove_possible_method :protect_against_forgery?
          def protect_against_forgery?
            false
          end
        end
      end

      def make_test_case_available_to_view!
        test_case_instance = self
        _helpers.module_eval do
          unless private_method_defined?(:_test_case)
            define_method(:_test_case) { test_case_instance }
            private :_test_case
          end
        end
      end

      module Locals
        attr_accessor :rendered_views

        def render(options = {}, local_assigns = {})
          case options
          when Hash
            if block_given?
              rendered_views.add options[:layout], options[:locals]
            elsif options.key?(:partial)
              rendered_views.add options[:partial], options[:locals]
            end
          else
            rendered_views.add options, local_assigns
          end

          super
        end
      end

      # The instance of ActionView::Base that is used by +render+.
      def view
        @view ||= begin
          view = @controller.view_context
          view.singleton_class.include(_helpers)
          view.extend(Locals)
          view.rendered_views = self.rendered_views
          view.output_buffer = self.output_buffer
          view
        end
      end

      alias_method :_view, :view

      INTERNAL_IVARS = [
        :@NAME,
        :@failures,
        :@assertions,
        :@__io__,
        :@_assertion_wrapped,
        :@_assertions,
        :@_result,
        :@_routes,
        :@controller,
        :@_layouts,
        :@_files,
        :@_rendered_views,
        :@method_name,
        :@output_buffer,
        :@_partials,
        :@passed,
        :@rendered,
        :@request,
        :@routes,
        :@tagged_logger,
        :@_templates,
        :@options,
        :@test_passed,
        :@view,
        :@view_context_class,
        :@_subscribers,
        :@html_document
      ]

      def _user_defined_ivars
        instance_variables - INTERNAL_IVARS
      end

      # Returns a Hash of instance variables and their values, as defined by
      # the user in the test case, which are then assigned to the view being
      # rendered. This is generally intended for internal use and extension
      # frameworks.
      def view_assigns
        Hash[_user_defined_ivars.map do |ivar|
          [ivar[1..-1].to_sym, instance_variable_get(ivar)]
        end]
      end

      def _routes
        @controller._routes if @controller.respond_to?(:_routes)
      end

      def method_missing(selector, *args)
        begin
          routes = @controller.respond_to?(:_routes) && @controller._routes
        rescue
          # Dont call routes, if there is an error on _routes call
        end

        if routes &&
           ( routes.named_routes.route_defined?(selector) ||
             routes.mounted_helpers.method_defined?(selector) )
          @controller.__send__(selector, *args)
        else
          super
        end
      end
    end

    include Behavior
  end
end