aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/lib/action_controller/test_case.rb
blob: 2b2f647d321aa288dfd6f7306f1e4c60d8952003 (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
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
require 'rack/session/abstract/id'
require 'active_support/core_ext/object/blank'
require 'active_support/core_ext/object/to_query'

module ActionController
  module TemplateAssertions
    extend ActiveSupport::Concern

    included do
      setup :setup_subscriptions
      teardown :teardown_subscriptions
    end

    def setup_subscriptions
      @partials = Hash.new(0)
      @templates = Hash.new(0)
      @layouts = Hash.new(0)

      ActiveSupport::Notifications.subscribe("render_template.action_view") do |name, start, finish, id, payload|
        path = payload[:layout]
        @layouts[path] += 1
      end

      ActiveSupport::Notifications.subscribe("!render_template.action_view") do |name, start, finish, id, payload|
        path = payload[:virtual_path]
        next unless path
        partial = path =~ /^.*\/_[^\/]*$/
        if partial
          @partials[path] += 1
          @partials[path.split("/").last] += 1
          @templates[path] += 1
        else
          @templates[path] += 1
        end
      end
    end

    def teardown_subscriptions
      ActiveSupport::Notifications.unsubscribe("render_template.action_view")
      ActiveSupport::Notifications.unsubscribe("!render_template.action_view")
    end

    def process(*args)
      @partials = Hash.new(0)
      @templates = Hash.new(0)
      @layouts = Hash.new(0)
      super
    end

    # Asserts that the request was rendered with the appropriate template file or partials.
    #
    # ==== Examples
    #
    #   # assert that the "new" view template was rendered
    #   assert_template "new"
    #
    #   # assert that the "_customer" partial was rendered twice
    #   assert_template :partial => '_customer', :count => 2
    #
    #   # assert that no partials were rendered
    #   assert_template :partial => false
    #
    # In a view test case, you can also assert that specific locals are passed
    # to partials:
    #
    #   # assert that the "_customer" partial was rendered with a specific object
    #   assert_template :partial => '_customer', :locals => { :customer => @customer }
    #
    def assert_template(options = {}, message = nil)
      validate_request!

      case options
      when NilClass, String, Symbol
        options = options.to_s if Symbol === options
        rendered = @templates
        msg = build_message(message,
                "expecting <?> but rendering with <?>",
                options, rendered.keys.join(', '))
        assert_block(msg) do
          if options.nil?
            @templates.blank?
          else
            rendered.any? { |t,num| t.match(options) }
          end
        end
      when Hash
        if expected_partial = options[:partial]
          if expected_locals = options[:locals]
            actual_locals = @locals[expected_partial.to_s.sub(/^_/,'')]
            expected_locals.each_pair do |k,v|
              assert_equal(v, actual_locals[k])
            end
          elsif expected_count = options[:count]
            actual_count = @partials[expected_partial]
            msg = build_message(message,
                    "expecting ? to be rendered ? time(s) but rendered ? time(s)",
                     expected_partial, expected_count, actual_count)
            assert(actual_count == expected_count.to_i, msg)
          elsif options.key?(:layout)
            msg = build_message(message,
                    "expecting layout <?> but action rendered <?>",
                    expected_layout, @layouts.keys)

            case layout = options[:layout]
            when String
              assert(@layouts.include?(expected_layout), msg)
            when Regexp
              assert(@layouts.any? {|l| l =~ layout }, msg)
            when nil
              assert(@layouts.empty?, msg)
            end
          else
            msg = build_message(message,
                    "expecting partial <?> but action rendered <?>",
                    options[:partial], @partials.keys)
            assert(@partials.include?(expected_partial), msg)
          end
        else
          assert @partials.empty?,
            "Expected no partials to be rendered"
        end
      end
    end
  end

  class TestRequest < ActionDispatch::TestRequest #:nodoc:
    def initialize(env = {})
      super

      self.session = TestSession.new
      self.session_options = TestSession::DEFAULT_OPTIONS.merge(:id => ActiveSupport::SecureRandom.hex(16))
    end

    class Result < ::Array #:nodoc:
      def to_s() join '/' end
      def self.new_escaped(strings)
        new strings.collect {|str| uri_parser.unescape str}
      end
    end

    def assign_parameters(routes, controller_path, action, parameters = {})
      parameters = parameters.symbolize_keys.merge(:controller => controller_path, :action => action)
      extra_keys = routes.extra_keys(parameters)
      non_path_parameters = get? ? query_parameters : request_parameters
      parameters.each do |key, value|
        if value.is_a? Fixnum
          value = value.to_s
        elsif value.is_a? Array
          value = Result.new(value)
        end

        if extra_keys.include?(key.to_sym)
          non_path_parameters[key] = value
        else
          path_parameters[key.to_s] = value
        end
      end

      # Clear the combined params hash in case it was already referenced.
      @env.delete("action_dispatch.request.parameters")

      params = self.request_parameters.dup
      %w(controller action only_path).each do |k|
        params.delete(k)
        params.delete(k.to_sym)
      end
      data = params.to_query

      @env['CONTENT_LENGTH'] = data.length.to_s
      @env['rack.input'] = StringIO.new(data)
    end

    def recycle!
      @formats = nil
      @env.delete_if { |k, v| k =~ /^(action_dispatch|rack)\.request/ }
      @env.delete_if { |k, v| k =~ /^action_dispatch\.rescue/ }
      @symbolized_path_params = nil
      @method = @request_method = nil
      @fullpath = @ip = @remote_ip = nil
      @env['action_dispatch.request.query_parameters'] = {}
    end
  end

  class TestResponse < ActionDispatch::TestResponse
    def recycle!
      @status = 200
      @header = {}
      @writer = lambda { |x| @body << x }
      @block = nil
      @length = 0
      @body = []
      @charset = @content_type = nil
      @request = @template = nil
    end
  end

  class TestSession < Rack::Session::Abstract::SessionHash #:nodoc:
    DEFAULT_OPTIONS = Rack::Session::Abstract::ID::DEFAULT_OPTIONS

    def initialize(session = {})
      @env, @by = nil, nil
      replace(session.stringify_keys)
      @loaded = true
    end

    def exists?
      true
    end
  end

  # Superclass for ActionController functional tests. Functional tests allow you to
  # test a single controller action per test method. This should not be confused with
  # integration tests (see ActionDispatch::IntegrationTest), which are more like
  # "stories" that can involve multiple controllers and multiple actions (i.e. multiple
  # different HTTP requests).
  #
  # == Basic example
  #
  # Functional tests are written as follows:
  # 1. First, one uses the +get+, +post+, +put+, +delete+ or +head+ method to simulate
  #    an HTTP request.
  # 2. Then, one asserts whether the current state is as expected. "State" can be anything:
  #    the controller's HTTP response, the database contents, etc.
  #
  # For example:
  #
  #   class BooksControllerTest < ActionController::TestCase
  #     def test_create
  #       # Simulate a POST response with the given HTTP parameters.
  #       post(:create, :book => { :title => "Love Hina" })
  #
  #       # Assert that the controller tried to redirect us to
  #       # the created book's URI.
  #       assert_response :found
  #
  #       # Assert that the controller really put the book in the database.
  #       assert_not_nil Book.find_by_title("Love Hina")
  #     end
  #   end
  #
  # == Special instance variables
  #
  # ActionController::TestCase will also automatically provide the following instance
  # variables for use in the tests:
  #
  # <b>@controller</b>::
  #      The controller instance that will be tested.
  # <b>@request</b>::
  #      An ActionController::TestRequest, representing the current HTTP
  #      request. You can modify this object before sending the HTTP request. For example,
  #      you might want to set some session properties before sending a GET request.
  # <b>@response</b>::
  #      An ActionController::TestResponse object, representing the response
  #      of the last HTTP response. In the above example, <tt>@response</tt> becomes valid
  #      after calling +post+. If the various assert methods are not sufficient, then you
  #      may use this object to inspect the HTTP response in detail.
  #
  # (Earlier versions of \Rails required each functional test to subclass
  # Test::Unit::TestCase and define @controller, @request, @response in +setup+.)
  #
  # == Controller is automatically inferred
  #
  # ActionController::TestCase will automatically infer the controller under test
  # from the test class name. If the controller cannot be inferred from the test
  # class name, you can explicitly set it with +tests+.
  #
  #   class SpecialEdgeCaseWidgetsControllerTest < ActionController::TestCase
  #     tests WidgetController
  #   end
  #
  # == \Testing controller internals
  #
  # 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 are available for the view.
  # * session: Objects being saved in the session.
  # * flash: The flash objects 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 devised 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 followed, 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 happened. But
  # sometimes you also want to manipulate these collections in the incoming request. This is really only relevant for sessions
  # and cookies, though. For sessions, you just do:
  #
  #   @request.session[:key] = "value"
  #   @request.cookies["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')
  class TestCase < ActiveSupport::TestCase
    module Behavior
      extend ActiveSupport::Concern
      include ActionDispatch::TestProcess

      attr_reader :response, :request

      module ClassMethods

        # Sets the controller class name. Useful if the name can't be inferred from test class.
        # Expects +controller_class+ as a constant. Example: <tt>tests WidgetController</tt>.
        def tests(controller_class)
          self.controller_class = controller_class
        end

        def controller_class=(new_class)
          prepare_controller_class(new_class) if new_class
          write_inheritable_attribute(:controller_class, new_class)
        end

        def controller_class
          if current_controller_class = read_inheritable_attribute(:controller_class)
            current_controller_class
          else
            self.controller_class = determine_default_controller_class(name)
          end
        end

        def determine_default_controller_class(name)
          name.sub(/Test$/, '').constantize
        rescue NameError
          nil
        end

        def prepare_controller_class(new_class)
          new_class.send :include, ActionController::TestCase::RaiseActionExceptions
        end

      end

      # Executes a request simulating GET HTTP method and set/volley the response
      def get(action, parameters = nil, session = nil, flash = nil)
        process(action, parameters, session, flash, "GET")
      end

      # Executes a request simulating POST HTTP method and set/volley the response
      def post(action, parameters = nil, session = nil, flash = nil)
        process(action, parameters, session, flash, "POST")
      end

      # Executes a request simulating PUT HTTP method and set/volley the response
      def put(action, parameters = nil, session = nil, flash = nil)
        process(action, parameters, session, flash, "PUT")
      end

      # Executes a request simulating DELETE HTTP method and set/volley the response
      def delete(action, parameters = nil, session = nil, flash = nil)
        process(action, parameters, session, flash, "DELETE")
      end

      # Executes a request simulating HEAD HTTP method and set/volley the response
      def head(action, parameters = nil, session = nil, flash = nil)
        process(action, parameters, session, flash, "HEAD")
      end

      def xml_http_request(request_method, action, parameters = nil, session = nil, flash = nil)
        @request.env['HTTP_X_REQUESTED_WITH'] = 'XMLHttpRequest'
        @request.env['HTTP_ACCEPT'] ||=  [Mime::JS, Mime::HTML, Mime::XML, 'text/xml', Mime::ALL].join(', ')
        __send__(request_method, action, parameters, session, flash).tap do
          @request.env.delete 'HTTP_X_REQUESTED_WITH'
          @request.env.delete 'HTTP_ACCEPT'
        end
      end
      alias xhr :xml_http_request

      def process(action, parameters = nil, session = nil, flash = nil, http_method = 'GET')
        # Sanity check for required instance variables so we can give an
        # understandable error message.
        %w(@routes @controller @request @response).each do |iv_name|
          if !(instance_variable_names.include?(iv_name) || instance_variable_names.include?(iv_name.to_sym)) || instance_variable_get(iv_name).nil?
            raise "#{iv_name} is nil: make sure you set it in your test's setup method."
          end
        end

        @request.recycle!
        @response.recycle!
        @controller.response_body = nil
        @controller.formats = nil
        @controller.params = nil

        @html_document = nil
        @request.env['REQUEST_METHOD'] = http_method

        parameters ||= {}
        @request.assign_parameters(@routes, @controller.class.name.underscore.sub(/_controller$/, ''), action.to_s, parameters)

        @request.session = ActionController::TestSession.new(session) if session
        @request.session["flash"] = @request.flash.update(flash || {})
        @request.session["flash"].sweep

        @controller.request = @request
        @controller.params.merge!(parameters)
        build_request_uri(action, parameters)
        @controller.class.class_eval { include Testing }
        @controller.process_with_new_base_test(@request, @response)
        @assigns = @controller.respond_to?(:view_assigns) ? @controller.view_assigns : {}
        @request.session.delete('flash') if @request.session['flash'].blank?
        @response
      end

      def setup_controller_request_and_response
        @request = TestRequest.new
        @response = TestResponse.new

        if klass = self.class.controller_class
          @controller ||= klass.new rescue nil
        end

        @request.env.delete('PATH_INFO')

        if defined?(@controller) && @controller
          @controller.request = @request
          @controller.params = {}
        end
      end

      # Cause the action to be rescued according to the regular rules for rescue_action when the visitor is not local
      def rescue_action_in_public!
        @request.remote_addr = '208.77.188.166' # example.com
      end

      included do
        include ActionController::TemplateAssertions
        include ActionDispatch::Assertions
        setup :setup_controller_request_and_response
      end

    private

      def build_request_uri(action, parameters)
        unless @request.env["PATH_INFO"]
          options = @controller.respond_to?(:url_options) ? @controller.__send__(:url_options).merge(parameters) : parameters
          options.update(
            :only_path => true,
            :action => action,
            :relative_url_root => nil,
            :_path_segments => @request.symbolized_path_parameters)

          url, query_string = @routes.url_for(options).split("?", 2)

          @request.env["SCRIPT_NAME"] = @controller.config.relative_url_root
          @request.env["PATH_INFO"] = url
          @request.env["QUERY_STRING"] = query_string || ""
        end
      end
    end

    # When the request.remote_addr remains the default for testing, which is 0.0.0.0, the exception is simply raised inline
    # (skipping the regular exception handling from rescue_action). If the request.remote_addr is anything else, the regular
    # rescue_action process takes place. This means you can test your rescue_action code by setting remote_addr to something else
    # than 0.0.0.0.
    #
    # The exception is stored in the exception accessor for further inspection.
    module RaiseActionExceptions
      def self.included(base)
        unless base.method_defined?(:exception) && base.method_defined?(:exception=)
          base.class_eval do
            attr_accessor :exception
            protected :exception, :exception=
          end
        end
      end

      protected
        def rescue_action_without_handler(e)
          self.exception = e

          if request.remote_addr == "0.0.0.0"
            raise(e)
          else
            super(e)
          end
        end
    end

    include Behavior
  end
end