aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/test/controller/parameters/parameters_permit_test.rb
blob: 3299f2d9d09f15890a7666015135caff565fe6a7 (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
require 'abstract_unit'
require 'action_dispatch/http/upload'
require 'action_controller/metal/strong_parameters'

class ParametersPermitTest < ActiveSupport::TestCase
  def assert_filtered_out(params, key)
    assert !params.has_key?(key), "key #{key.inspect} has not been filtered out"
  end

  setup do
    @params = ActionController::Parameters.new(
      person: {
        age: '32',
        name: {
          first: 'David',
          last: 'Heinemeier Hansson'
        },
        addresses: [{city: 'Chicago', state: 'Illinois'}]
      }
    )

    @struct_fields = []
    %w(0 1 12).each do |number|
      ['', 'i', 'f'].each do |suffix|
        @struct_fields << "sf(#{number}#{suffix})"
      end
    end
  end

  test 'if nothing is permitted, the hash becomes empty' do
    params = ActionController::Parameters.new(id: '1234')
    permitted = params.permit
    assert permitted.permitted?
    assert permitted.empty?
  end

  test 'key: permitted scalar values' do
    values  = ['a', :a, nil]
    values += [0, 1.0, 2**128, BigDecimal.new(1)]
    values += [true, false]
    values += [Date.today, Time.now, DateTime.now]
    values += [STDOUT, StringIO.new, ActionDispatch::Http::UploadedFile.new(tempfile: __FILE__),
      Rack::Test::UploadedFile.new(__FILE__)]

    values.each do |value|
      params = ActionController::Parameters.new(id: value)
      permitted = params.permit(:id)
      assert_equal value, permitted[:id]

      @struct_fields.each do |sf|
        params = ActionController::Parameters.new(sf => value)
        permitted = params.permit(:sf)
        assert_equal value, permitted[sf]
      end
    end
  end

  test 'key: unknown keys are filtered out' do
    params = ActionController::Parameters.new(id: '1234', injected: 'injected')
    permitted = params.permit(:id)
    assert_equal '1234', permitted[:id]
    assert_filtered_out permitted, :injected
  end

  test 'key: arrays are filtered out' do
    [[], [1], ['1']].each do |array|
      params = ActionController::Parameters.new(id: array)
      permitted = params.permit(:id)
      assert_filtered_out permitted, :id

      @struct_fields.each do |sf|
        params = ActionController::Parameters.new(sf => array)
        permitted = params.permit(:sf)
        assert_filtered_out permitted, sf
      end
    end
  end

  test 'key: hashes are filtered out' do
    [{}, {foo: 1}, {foo: 'bar'}].each do |hash|
      params = ActionController::Parameters.new(id: hash)
      permitted = params.permit(:id)
      assert_filtered_out permitted, :id

      @struct_fields.each do |sf|
        params = ActionController::Parameters.new(sf => hash)
        permitted = params.permit(:sf)
        assert_filtered_out permitted, sf
      end
    end
  end

  test 'key: non-permitted scalar values are filtered out' do
    params = ActionController::Parameters.new(id: Object.new)
    permitted = params.permit(:id)
    assert_filtered_out permitted, :id

    @struct_fields.each do |sf|
      params = ActionController::Parameters.new(sf => Object.new)
      permitted = params.permit(:sf)
      assert_filtered_out permitted, sf
    end
  end

  test 'key: it is not assigned if not present in params' do
    params = ActionController::Parameters.new(name: 'Joe')
    permitted = params.permit(:id)
    assert !permitted.has_key?(:id)
  end

  test 'key to empty array: empty arrays pass' do
    params = ActionController::Parameters.new(id: [])
    permitted = params.permit(id: [])
    assert_equal [], permitted[:id]
  end

  test 'do not break params filtering on nil values' do
    params = ActionController::Parameters.new(a: 1, b: [1, 2, 3], c: nil)

    permitted = params.permit(:a, c: [], b: [])
    assert_equal 1, permitted[:a]
    assert_equal [1, 2, 3], permitted[:b]
    assert_equal nil, permitted[:c]
  end

  test 'key to empty array: arrays of permitted scalars pass' do
    [['foo'], [1], ['foo', 'bar'], [1, 2, 3]].each do |array|
      params = ActionController::Parameters.new(id: array)
      permitted = params.permit(id: [])
      assert_equal array, permitted[:id]
    end
  end

  test 'key to empty array: permitted scalar values do not pass' do
    ['foo', 1].each do |permitted_scalar|
      params = ActionController::Parameters.new(id: permitted_scalar)
      permitted = params.permit(id: [])
      assert_filtered_out permitted, :id
    end
  end

  test 'key to empty array: arrays of non-permitted scalar do not pass' do
    [[Object.new], [[]], [[1]], [{}], [{id: '1'}]].each do |non_permitted_scalar|
      params = ActionController::Parameters.new(id: non_permitted_scalar)
      permitted = params.permit(id: [])
      assert_filtered_out permitted, :id
    end
  end

  test "fetch raises ParameterMissing exception" do
    e = assert_raises(ActionController::ParameterMissing) do
      @params.fetch :foo
    end
    assert_equal :foo, e.param
  end

  test "fetch with a default value of a hash does not mutate the object" do
    params = ActionController::Parameters.new({})
    params.fetch :foo, {}
    assert_equal nil, params[:foo]
  end

  test 'hashes in array values get wrapped' do
    params = ActionController::Parameters.new(foo: [{}, {}])
    params[:foo].each do |hash|
      assert !hash.permitted?
    end
  end

  # Strong params has an optimization to avoid looping every time you read
  # a key whose value is an array and building a new object. We check that
  # optimization here.
  test 'arrays are converted at most once' do
    params = ActionController::Parameters.new(foo: [{}])
    assert_same params[:foo], params[:foo]
  end

  # Strong params has an internal cache to avoid duplicated loops in the most
  # common usage pattern. See the docs of the method `converted_arrays`.
  #
  # This test checks that if we push a hash to an array (in-place modification)
  # the cache does not get fooled, the hash is still wrapped as strong params,
  # and not permitted.
  test 'mutated arrays are detected' do
    params = ActionController::Parameters.new(users: [{id: 1}])

    permitted = params.permit(users: [:id])
    permitted[:users] << {injected: 1}
    assert_not permitted[:users].last.permitted?
  end

  test "fetch doesnt raise ParameterMissing exception if there is a default" do
    assert_equal "monkey", @params.fetch(:foo, "monkey")
    assert_equal "monkey", @params.fetch(:foo) { "monkey" }
  end

  test "fetch doesnt raise ParameterMissing exception if there is a default that is nil" do
    assert_equal nil, @params.fetch(:foo, nil)
    assert_equal nil, @params.fetch(:foo) { nil }
  end

  test 'KeyError in fetch block should not be covered up' do
    params = ActionController::Parameters.new
    e = assert_raises(KeyError) do
      params.fetch(:missing_key) { {}.fetch(:also_missing) }
    end
    assert_match(/:also_missing$/, e.message)
  end

  test "not permitted is sticky beyond merges" do
    assert !@params.merge(a: "b").permitted?
  end

  test "permitted is sticky beyond merges" do
    @params.permit!
    assert @params.merge(a: "b").permitted?
  end

  test "modifying the parameters" do
    @params[:person][:hometown] = "Chicago"
    @params[:person][:family] = { brother: "Jonas" }

    assert_equal "Chicago", @params[:person][:hometown]
    assert_equal "Jonas", @params[:person][:family][:brother]
  end

  test "permit state is kept on a dup" do
    @params.permit!
    assert_equal @params.permitted?, @params.dup.permitted?
  end

  test "permit is recursive" do
    @params.permit!
    assert @params.permitted?
    assert @params[:person].permitted?
    assert @params[:person][:name].permitted?
    assert @params[:person][:addresses][0].permitted?
  end

  test "permitted takes a default value when Parameters.permit_all_parameters is set" do
    begin
      ActionController::Parameters.permit_all_parameters = true
      params = ActionController::Parameters.new({ person: {
        age: "32", name: { first: "David", last: "Heinemeier Hansson" }
      }})

      assert params.slice(:person).permitted?
      assert params[:person][:name].permitted?
    ensure
      ActionController::Parameters.permit_all_parameters = false
    end
  end

  test "permitting parameters as an array" do
    assert_equal "32", @params[:person].permit([ :age ])[:age]
  end

  test "to_h returns empty hash on unpermitted params" do
    assert @params.to_h.is_a? ActiveSupport::HashWithIndifferentAccess
    assert_not @params.to_h.is_a? ActionController::Parameters
    assert @params.to_h.empty?
  end

  test "to_h returns converted hash on permitted params" do
    @params.permit!

    assert @params.to_h.is_a? ActiveSupport::HashWithIndifferentAccess
    assert_not @params.to_h.is_a? ActionController::Parameters
  end

  test "to_h returns converted hash when .permit_all_parameters is set" do
    begin
      ActionController::Parameters.permit_all_parameters = true
      params = ActionController::Parameters.new(crab: "Senjougahara Hitagi")

      assert params.to_h.is_a? ActiveSupport::HashWithIndifferentAccess
      assert_not @params.to_h.is_a? ActionController::Parameters
      assert_equal({ "crab" => "Senjougahara Hitagi" }, params.to_h)
    ensure
      ActionController::Parameters.permit_all_parameters = false
    end
  end

  test "to_h returns always permitted parameter on unpermitted params" do
    params = ActionController::Parameters.new(
      controller: "users",
      action: "create",
      user: {
        name: "Sengoku Nadeko"
      }
    )

    assert_equal({ "controller" => "users", "action" => "create" }, params.to_h)
  end

  test "to_unsafe_h returns unfiltered params" do
    assert @params.to_unsafe_h.is_a? ActiveSupport::HashWithIndifferentAccess
    assert_not @params.to_unsafe_h.is_a? ActionController::Parameters
  end

  test "to_unsafe_h returns unfiltered params even after accessing few keys" do
    params = ActionController::Parameters.new("f"=>{"language_facet"=>["Tibetan"]})
    expected = {"f"=>{"language_facet"=>["Tibetan"]}}

    assert params['f'].is_a? ActionController::Parameters
    assert_equal expected, params.to_unsafe_h
  end

  test "to_h only deep dups Ruby collections" do
    company = Class.new do
      attr_reader :dupped
      def dup; @dupped = true; end
    end.new

    params = ActionController::Parameters.new(prem: { likes: %i( dancing ) })
    assert_equal({ 'prem' => { 'likes' => %i( dancing ) } }, params.permit!.to_h)

    params = ActionController::Parameters.new(companies: [ company, :acme ])
    assert_equal({ 'companies' => [ company, :acme ] }, params.permit!.to_h)
    assert_not company.dupped
  end

  test "to_unsafe_h only deep dups Ruby collections" do
    company = Class.new do
      attr_reader :dupped
      def dup; @dupped = true; end
    end.new

    params = ActionController::Parameters.new(prem: { likes: %i( dancing ) })
    assert_equal({ 'prem' => { 'likes' => %i( dancing ) } }, params.to_unsafe_h)

    params = ActionController::Parameters.new(companies: [ company, :acme ])
    assert_equal({ 'companies' => [ company, :acme ] }, params.to_unsafe_h)
    assert_not company.dupped
  end

  test "include? returns true when the key is present" do
    assert @params.include? :person
    assert @params.include? 'person'
    assert_not @params.include? :gorilla
  end
end