aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/lib/action_controller/testing/test_case.rb
blob: a80488e13ed9760cba62026e341d8a19c56d8018 (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
require 'active_support/test_case'
require 'action_controller/testing/process'

module ActionController
  # 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 ActionController::IntegrationTest), which are more like
  # "stories" that can involve multiple controllers and mutliple 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 explicity 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
    include TestProcess

    module Assertions
      %w(response selector tag dom routing model).each do |kind|
        include ActionController::Assertions.const_get("#{kind.camelize}Assertions")
      end
    end
    include Assertions

    # When the request.remote_addr remains the default for testing, which is 0.0.0.0, the exception is simply raised inline
    # (bystepping 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)
        base.class_eval do
          attr_accessor :exception
          protected :exception, :exception=
        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

    setup :setup_controller_request_and_response

    @@controller_class = nil

    class << self
      # 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, RaiseActionExceptions
      end
    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

      if @controller
        @controller.request = @request
        @controller.params = {}
        @controller.send(:initialize_current_url)
      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
  end
end