aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/lib/action_dispatch/testing/integration.rb
blob: 2093bb3a0e79cfc385840c3a6cc109701445b7cf (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
require 'stringio'
require 'uri'
require 'active_support/core_ext/object/metaclass'
require 'rack/test'

module ActionDispatch
  module Integration #:nodoc:
    module RequestHelpers
      # Performs a GET request with the given parameters.
      #
      # - +path+: The URI (as a String) on which you want to perform a GET
      #   request.
      # - +parameters+: The HTTP parameters that you want to pass. This may
      #   be +nil+,
      #   a Hash, or a String that is appropriately encoded
      #   (<tt>application/x-www-form-urlencoded</tt> or
      #   <tt>multipart/form-data</tt>).
      # - +headers+: Additional HTTP headers to pass, as a Hash. The keys will
      #   automatically be upcased, with the prefix 'HTTP_' added if needed.
      #
      # This method returns an Response object, which one can use to
      # inspect the details of the response. Furthermore, if this method was
      # called from an ActionDispatch::IntegrationTest object, then that
      # object's <tt>@response</tt> instance variable will point to the same
      # response object.
      #
      # You can also perform POST, PUT, DELETE, and HEAD requests with +post+,
      # +put+, +delete+, and +head+.
      def get(path, parameters = nil, headers = nil)
        process :get, path, parameters, headers
      end

      # Performs a POST request with the given parameters. See get() for more
      # details.
      def post(path, parameters = nil, headers = nil)
        process :post, path, parameters, headers
      end

      # Performs a PUT request with the given parameters. See get() for more
      # details.
      def put(path, parameters = nil, headers = nil)
        process :put, path, parameters, headers
      end

      # Performs a DELETE request with the given parameters. See get() for
      # more details.
      def delete(path, parameters = nil, headers = nil)
        process :delete, path, parameters, headers
      end

      # Performs a HEAD request with the given parameters. See get() for more
      # details.
      def head(path, parameters = nil, headers = nil)
        process :head, path, parameters, headers
      end

      # Performs an XMLHttpRequest request with the given parameters, mirroring
      # a request from the Prototype library.
      #
      # The request_method is :get, :post, :put, :delete or :head; the
      # parameters are +nil+, a hash, or a url-encoded or multipart string;
      # the headers are a hash.  Keys are automatically upcased and prefixed
      # with 'HTTP_' if not already.
      def xml_http_request(request_method, path, parameters = nil, headers = nil)
        headers ||= {}
        headers['HTTP_X_REQUESTED_WITH'] = 'XMLHttpRequest'
        headers['HTTP_ACCEPT'] ||= [Mime::JS, Mime::HTML, Mime::XML, 'text/xml', Mime::ALL].join(', ')
        process(request_method, path, parameters, headers)
      end
      alias xhr :xml_http_request

      # Follow a single redirect response. If the last response was not a
      # redirect, an exception will be raised. Otherwise, the redirect is
      # performed on the location header.
      def follow_redirect!
        raise "not a redirect! #{status} #{status_message}" unless redirect?
        get(response.location)
        status
      end

      # Performs a request using the specified method, following any subsequent
      # redirect. Note that the redirects are followed until the response is
      # not a redirect--this means you may run into an infinite loop if your
      # redirect loops back to itself.
      def request_via_redirect(http_method, path, parameters = nil, headers = nil)
        process(http_method, path, parameters, headers)
        follow_redirect! while redirect?
        status
      end

      # Performs a GET request, following any subsequent redirect.
      # See +request_via_redirect+ for more information.
      def get_via_redirect(path, parameters = nil, headers = nil)
        request_via_redirect(:get, path, parameters, headers)
      end

      # Performs a POST request, following any subsequent redirect.
      # See +request_via_redirect+ for more information.
      def post_via_redirect(path, parameters = nil, headers = nil)
        request_via_redirect(:post, path, parameters, headers)
      end

      # Performs a PUT request, following any subsequent redirect.
      # See +request_via_redirect+ for more information.
      def put_via_redirect(path, parameters = nil, headers = nil)
        request_via_redirect(:put, path, parameters, headers)
      end

      # Performs a DELETE request, following any subsequent redirect.
      # See +request_via_redirect+ for more information.
      def delete_via_redirect(path, parameters = nil, headers = nil)
        request_via_redirect(:delete, path, parameters, headers)
      end
    end

    # An integration Session instance represents a set of requests and responses
    # performed sequentially by some virtual user. Because you can instantiate
    # multiple sessions and run them side-by-side, you can also mimic (to some
    # limited extent) multiple simultaneous users interacting with your system.
    #
    # Typically, you will instantiate a new session using
    # IntegrationTest#open_session, rather than instantiating
    # Integration::Session directly.
    class Session
      DEFAULT_HOST = "www.example.com"

      include Test::Unit::Assertions
      include TestProcess, RequestHelpers, Assertions

      %w( status status_message headers body redirect? ).each do |method|
        delegate method, :to => :response, :allow_nil => true
      end

      %w( path ).each do |method|
        delegate method, :to => :request, :allow_nil => true
      end

      # The hostname used in the last request.
      attr_accessor :host

      # The remote_addr used in the last request.
      attr_accessor :remote_addr

      # The Accept header to send.
      attr_accessor :accept

      # A map of the cookies returned by the last response, and which will be
      # sent with the next request.
      def cookies
        @mock_session.cookie_jar
      end

      # A reference to the controller instance used by the last request.
      attr_reader :controller

      # A reference to the request instance used by the last request.
      attr_reader :request

      # A reference to the response instance used by the last request.
      attr_reader :response

      # A running counter of the number of requests processed.
      attr_accessor :request_count

      # Create and initialize a new Session instance.
      def initialize(app)
        @app = app
        reset!
      end

      # Resets the instance. This can be used to reset the state information
      # in an existing session instance, so it can be used from a clean-slate
      # condition.
      #
      #   session.reset!
      def reset!
        @https = false
        @mock_session = Rack::MockSession.new(@app, DEFAULT_HOST)
        @controller = @request = @response = nil
        @request_count = 0

        self.host        = DEFAULT_HOST
        self.remote_addr = "127.0.0.1"
        self.accept      = "text/xml,application/xml,application/xhtml+xml," +
                           "text/html;q=0.9,text/plain;q=0.8,image/png," +
                           "*/*;q=0.5"

        unless defined? @named_routes_configured
          # install the named routes in this session instance.
          klass = metaclass
          ActionController::Routing::Routes.install_helpers(klass)

          # the helpers are made protected by default--we make them public for
          # easier access during testing and troubleshooting.
          klass.module_eval { public *ActionController::Routing::Routes.named_routes.helpers }
          @named_routes_configured = true
        end
      end

      # Specify whether or not the session should mimic a secure HTTPS request.
      #
      #   session.https!
      #   session.https!(false)
      def https!(flag = true)
        @https = flag
      end

      # Return +true+ if the session is mimicking a secure HTTPS request.
      #
      #   if session.https?
      #     ...
      #   end
      def https?
        @https
      end

      # Set the host name to use in the next request.
      #
      #   session.host! "www.example.com"
      def host!(name)
        @host = name
      end

      # Returns the URL for the given options, according to the rules specified
      # in the application's routes.
      def url_for(options)
        controller ?
          controller.url_for(options) :
          generic_url_rewriter.rewrite(options)
      end

      private

        # Performs the actual request.
        def process(method, path, parameters = nil, rack_environment = nil)
          if path =~ %r{://}
            location = URI.parse(path)
            https! URI::HTTPS === location if location.scheme
            host! location.host if location.host
            path = location.query ? "#{location.path}?#{location.query}" : location.path
          end

          unless ActionController::Base < ActionController::Testing
            ActionController::Base.class_eval do
              include ActionController::Testing
            end
          end

          env = {
            :method => method,
            :params => parameters,

            "SERVER_NAME"     => host,
            "SERVER_PORT"     => (https? ? "443" : "80"),
            "HTTPS"           => https? ? "on" : "off",
            "rack.url_scheme" => https? ? "https" : "http",

            "REQUEST_URI"    => path,
            "HTTP_HOST"      => host,
            "REMOTE_ADDR"    => remote_addr,
            "CONTENT_TYPE"   => "application/x-www-form-urlencoded",
            "HTTP_ACCEPT"    => accept,

            "action_dispatch.show_exceptions" => false
          }

          (rack_environment || {}).each do |key, value|
            env[key] = value
          end

          session = Rack::Test::Session.new(@mock_session)
          session.request(path, env)

          @request_count += 1
          @request  = ActionDispatch::Request.new(session.last_request.env)
          @response = ActionDispatch::TestResponse.from_response(@mock_session.last_response)
          @html_document = nil

          @controller = session.last_request.env['action_controller.instance']

          return response.status
        end

        # Get a temporary URL writer object
        def generic_url_rewriter
          env = {
            'REQUEST_METHOD' => "GET",
            'QUERY_STRING'   => "",
            "REQUEST_URI"    => "/",
            "HTTP_HOST"      => host,
            "SERVER_PORT"    => https? ? "443" : "80",
            "HTTPS"          => https? ? "on" : "off"
          }
          ActionController::UrlRewriter.new(ActionDispatch::Request.new(env), {})
        end
    end

    module Runner
      def app
        @app
      end

      # Reset the current session. This is useful for testing multiple sessions
      # in a single test case.
      def reset!
        @integration_session = open_session
      end

      %w(get post put head delete cookies assigns
         xml_http_request xhr get_via_redirect post_via_redirect).each do |method|
        define_method(method) do |*args|
          reset! unless @integration_session
          # reset the html_document variable, but only for new get/post calls
          @html_document = nil unless %w(cookies assigns).include?(method)
          returning @integration_session.__send__(method, *args) do
            copy_session_variables!
          end
        end
      end

      # Open a new session instance. If a block is given, the new session is
      # yielded to the block before being returned.
      #
      #   session = open_session do |sess|
      #     sess.extend(CustomAssertions)
      #   end
      #
      # By default, a single session is automatically created for you, but you
      # can use this method to open multiple sessions that ought to be tested
      # simultaneously.
      def open_session(app = nil)
        session = Integration::Session.new(app || self.app)

        # delegate the fixture accessors back to the test instance
        extras = Module.new { attr_accessor :delegate, :test_result }
        if self.class.respond_to?(:fixture_table_names)
          self.class.fixture_table_names.each do |table_name|
            name = table_name.tr(".", "_")
            next unless respond_to?(name)
            extras.__send__(:define_method, name) { |*args|
              delegate.send(name, *args)
            }
          end
        end

        # delegate add_assertion to the test case
        extras.__send__(:define_method, :add_assertion) {
          test_result.add_assertion
        }
        session.extend(extras)
        session.delegate = self
        session.test_result = @_result

        yield session if block_given?
        session
      end

      # Copy the instance variables from the current session instance into the
      # test instance.
      def copy_session_variables! #:nodoc:
        return unless @integration_session
        %w(controller response request).each do |var|
          instance_variable_set("@#{var}", @integration_session.__send__(var))
        end
      end

      # Delegate unhandled messages to the current session instance.
      def method_missing(sym, *args, &block)
        reset! unless @integration_session
        if @integration_session.respond_to?(sym)
          returning @integration_session.__send__(sym, *args, &block) do
            copy_session_variables!
          end
        else
          super
        end
      end
    end
  end

  # An IntegrationTest is one that spans multiple controllers and actions,
  # tying them all together to ensure they work together as expected. It tests
  # more completely than either unit or functional tests do, exercising the
  # entire stack, from the dispatcher to the database.
  #
  # At its simplest, you simply extend IntegrationTest and write your tests
  # using the get/post methods:
  #
  #   require "test_helper"
  #
  #   class ExampleTest < ActionController::IntegrationTest
  #     fixtures :people
  #
  #     def test_login
  #       # get the login page
  #       get "/login"
  #       assert_equal 200, status
  #
  #       # post the login and follow through to the home page
  #       post "/login", :username => people(:jamis).username,
  #         :password => people(:jamis).password
  #       follow_redirect!
  #       assert_equal 200, status
  #       assert_equal "/home", path
  #     end
  #   end
  #
  # However, you can also have multiple session instances open per test, and
  # even extend those instances with assertions and methods to create a very
  # powerful testing DSL that is specific for your application. You can even
  # reference any named routes you happen to have defined!
  #
  #   require "test_helper"
  #
  #   class AdvancedTest < ActionController::IntegrationTest
  #     fixtures :people, :rooms
  #
  #     def test_login_and_speak
  #       jamis, david = login(:jamis), login(:david)
  #       room = rooms(:office)
  #
  #       jamis.enter(room)
  #       jamis.speak(room, "anybody home?")
  #
  #       david.enter(room)
  #       david.speak(room, "hello!")
  #     end
  #
  #     private
  #
  #       module CustomAssertions
  #         def enter(room)
  #           # reference a named route, for maximum internal consistency!
  #           get(room_url(:id => room.id))
  #           assert(...)
  #           ...
  #         end
  #
  #         def speak(room, message)
  #           xml_http_request "/say/#{room.id}", :message => message
  #           assert(...)
  #           ...
  #         end
  #       end
  #
  #       def login(who)
  #         open_session do |sess|
  #           sess.extend(CustomAssertions)
  #           who = people(who)
  #           sess.post "/login", :username => who.username,
  #             :password => who.password
  #           assert(...)
  #         end
  #       end
  #   end
  class IntegrationTest < ActiveSupport::TestCase
    include Integration::Runner

    @@app = nil

    def self.app
      # DEPRECATE Rails application fallback
      # This should be set by the initializer
      @@app || (defined?(Rails.application) && Rails.application) || nil
    end

    def self.app=(app)
      @@app = app
    end

    def app
      super || self.class.app
    end
  end
end