aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/test/controller/parameters/parameters_permit_test.rb
blob: fbfe24059b1091e64da7fd1bcd8b58bb84e12c9c (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
499
500
501
502
503
504
505
506
507
508
509
510
# frozen_string_literal: true

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_not 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

  def walk_permitted(params)
    params.each do |k, v|
      case v
      when ActionController::Parameters
        walk_permitted v
      when Array
        v.each { |x| walk_permitted v }
      end
    end
  end

  test "iteration should not impact permit" do
    hash = { "foo" => { "bar" => { "0" => { "baz" => "hello", "zot" => "1" } } } }
    params = ActionController::Parameters.new(hash)

    walk_permitted params

    sanitized = params[:foo].permit(bar: [:baz])
    assert_equal({ "0" => { "baz" => "hello" } }, sanitized[:bar].to_unsafe_h)
  end

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

  test "key: permitted scalar values" do
    values  = ["a", :a, nil]
    values += [0, 1.0, 2**128, BigDecimal(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)
      if value.nil?
        assert_nil permitted[:id]
      else
        assert_equal value, permitted[:id]
      end

      @struct_fields.each do |sf|
        params = ActionController::Parameters.new(sf => value)
        permitted = params.permit(:sf)
        if value.nil?
          assert_nil permitted[sf]
        else
          assert_equal value, permitted[sf]
        end
      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_not 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_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 "key to empty hash: arbitrary hashes are permitted" do
    params = ActionController::Parameters.new(
      username: "fxn",
      preferences: {
        scheme: "Marazul",
        font: {
          name: "Source Code Pro",
          size: 12
        },
        tabstops:   [4, 8, 12, 16],
        suspicious: [true, Object.new, false, /yo!/],
        dubious:    [{ a: :a, b: /wtf!/ }, { c: :c }],
        injected:   Object.new
      },
      hacked: 1 # not a hash
    )

    permitted = params.permit(:username, preferences: {}, hacked: {})

    assert_equal "fxn",             permitted[:username]
    assert_equal "Marazul",         permitted[:preferences][:scheme]
    assert_equal "Source Code Pro", permitted[:preferences][:font][:name]
    assert_equal 12,                permitted[:preferences][:font][:size]
    assert_equal [4, 8, 12, 16],    permitted[:preferences][:tabstops]
    assert_equal [true, false],     permitted[:preferences][:suspicious]
    assert_equal :a,                permitted[:preferences][:dubious][0][:a]
    assert_equal :c,                permitted[:preferences][:dubious][1][:c]

    assert_filtered_out permitted[:preferences][:dubious][0], :b
    assert_filtered_out permitted[:preferences], :injected
    assert_filtered_out permitted, :hacked
  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_nil params[:foo]
  end

  test "hashes in array values get wrapped" do
    params = ActionController::Parameters.new(foo: [{}, {}])
    params[:foo].each do |hash|
      assert_not_predicate 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_predicate 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_nil @params.fetch(:foo, nil)
    assert_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_not_predicate @params.merge(a: "b"), :permitted?
  end

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

  test "merge with parameters" do
    other_params = ActionController::Parameters.new(id: "1234").permit!
    merged_params = @params.merge(other_params)

    assert merged_params[:id]
  end

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

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

  test "merge! with parameters" do
    other_params = ActionController::Parameters.new(id: "1234").permit!
    @params.merge!(other_params)

    assert_equal "1234", @params[:id]
    assert_equal "32", @params[:person][:age]
  end

  test "#reverse_merge with parameters" do
    default_params = ActionController::Parameters.new(id: "1234", person: {}).permit!
    merged_params = @params.reverse_merge(default_params)

    assert_equal "1234", merged_params[:id]
    assert_not_predicate merged_params[:person], :empty?
  end

  test "#with_defaults is an alias of reverse_merge" do
    default_params = ActionController::Parameters.new(id: "1234", person: {}).permit!
    merged_params = @params.with_defaults(default_params)

    assert_equal "1234", merged_params[:id]
    assert_not_predicate merged_params[:person], :empty?
  end

  test "not permitted is sticky beyond reverse_merge" do
    assert_not_predicate @params.reverse_merge(a: "b"), :permitted?
  end

  test "permitted is sticky beyond reverse_merge" do
    @params.permit!
    assert_predicate @params.reverse_merge(a: "b"), :permitted?
  end

  test "#reverse_merge! with parameters" do
    default_params = ActionController::Parameters.new(id: "1234", person: {}).permit!
    @params.reverse_merge!(default_params)

    assert_equal "1234", @params[:id]
    assert_not_predicate @params[:person], :empty?
  end

  test "#with_defaults! is an alias of reverse_merge!" do
    default_params = ActionController::Parameters.new(id: "1234", person: {}).permit!
    @params.with_defaults!(default_params)

    assert_equal "1234", @params[:id]
    assert_not_predicate @params[:person], :empty?
  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! is recursive" do
    @params[:nested_array] = [[{ x: 2, y: 3 }, { x: 21, y: 42 }]]
    @params.permit!
    assert_predicate @params, :permitted?
    assert_predicate @params[:person], :permitted?
    assert_predicate @params[:person][:name], :permitted?
    assert_predicate @params[:person][:addresses][0], :permitted?
    assert_predicate @params[:nested_array][0][0], :permitted?
    assert_predicate @params[:nested_array][0][1], :permitted?
  end

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

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

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

  test "to_h raises UnfilteredParameters on unfiltered params" do
    assert_raises(ActionController::UnfilteredParameters) do
      @params.to_h
    end
  end

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

    assert_instance_of ActiveSupport::HashWithIndifferentAccess, @params.to_h
    assert_not_kind_of ActionController::Parameters, @params.to_h
  end

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

    assert_instance_of ActiveSupport::HashWithIndifferentAccess, params.to_h
    assert_not_kind_of ActionController::Parameters, params.to_h
    assert_equal({ "crab" => "Senjougahara Hitagi" }, params.to_h)
  ensure
    ActionController::Parameters.permit_all_parameters = false
  end

  test "to_hash raises UnfilteredParameters on unfiltered params" do
    assert_raises(ActionController::UnfilteredParameters) do
      @params.to_hash
    end
  end

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

    assert_instance_of Hash, @params.to_hash
    assert_not_kind_of ActionController::Parameters, @params.to_hash
  end

  test "parameters can be implicit converted to Hash" do
    params = ActionController::Parameters.new
    params.permit!

    assert_equal({ a: 1 }, { a: 1 }.merge!(params))
  end

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

    assert_instance_of Hash, params.to_hash
    assert_not_kind_of ActionController::Parameters, params.to_hash
    assert_equal({ "crab" => "Senjougahara Hitagi" }, params.to_hash)
    assert_equal({ "crab" => "Senjougahara Hitagi" }, params)
  ensure
    ActionController::Parameters.permit_all_parameters = false
  end

  test "to_unsafe_h returns unfiltered params" do
    assert_instance_of ActiveSupport::HashWithIndifferentAccess, @params.to_unsafe_h
    assert_not_kind_of ActionController::Parameters, @params.to_unsafe_h
  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_instance_of ActionController::Parameters, params["f"]
    assert_equal expected, params.to_unsafe_h
  end

  test "to_unsafe_h does not mutate the parameters" do
    params = ActionController::Parameters.new("f" => { "language_facet" => ["Tibetan"] })
    params[:f]

    params.to_unsafe_h

    assert_not_predicate params, :permitted?
    assert_not_predicate params[:f], :permitted?
  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

  test "scalar values should be filtered when array or hash is specified" do
    params = ActionController::Parameters.new(foo: "bar")

    assert params.permit(:foo).has_key?(:foo)
    assert_not params.permit(foo: []).has_key?(:foo)
    assert_not params.permit(foo: [:bar]).has_key?(:foo)
    assert_not params.permit(foo: :bar).has_key?(:foo)
  end

  test "#permitted? is false by default" do
    params = ActionController::Parameters.new

    assert_equal false, params.permitted?
  end
end