aboutsummaryrefslogtreecommitdiffstats
path: root/activesupport/test/json/encoding_test.rb
blob: 11a2ca9d90e121143b38f469670ac199af3e3a16 (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
# encoding: utf-8
require 'securerandom'
require 'abstract_unit'
require 'active_support/core_ext/string/inflections'
require 'active_support/json'

class TestJSONEncoding < ActiveSupport::TestCase
  class Foo
    def initialize(a, b)
      @a, @b = a, b
    end
  end

  class Hashlike
    def to_hash
      { :foo => "hello", :bar => "world" }
    end
  end

  class Custom
    def as_json(options)
      'custom'
    end
  end

  class CustomWithOptions
    attr_accessor :foo, :bar

    def as_json(options={})
      options[:only] = %w(foo bar)
      super(options)
    end
  end

  TrueTests     = [[ true,  %(true)  ]]
  FalseTests    = [[ false, %(false) ]]
  NilTests      = [[ nil,   %(null)  ]]
  NumericTests  = [[ 1,     %(1)     ],
                   [ 2.5,   %(2.5)   ],
                   [ 0.0/0.0,   %(null) ],
                   [ 1.0/0.0,   %(null) ],
                   [ -1.0/0.0,  %(null) ],
                   [ BigDecimal('0.0')/BigDecimal('0.0'),  %(null) ],
                   [ BigDecimal('2.5'), %("#{BigDecimal('2.5').to_s}") ]]

  StringTests   = [[ 'this is the <string>',     %("this is the \\u003Cstring\\u003E")],
                   [ 'a "string" with quotes & an ampersand', %("a \\"string\\" with quotes \\u0026 an ampersand") ],
                   [ 'http://test.host/posts/1', %("http://test.host/posts/1")],
                   [ "Control characters: \x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\342\200\250\342\200\251",
                     %("Control characters: \\u0000\\u0001\\u0002\\u0003\\u0004\\u0005\\u0006\\u0007\\b\\t\\n\\u000B\\f\\r\\u000E\\u000F\\u0010\\u0011\\u0012\\u0013\\u0014\\u0015\\u0016\\u0017\\u0018\\u0019\\u001A\\u001B\\u001C\\u001D\\u001E\\u001F\\u2028\\u2029") ]]

  ArrayTests    = [[ ['a', 'b', 'c'],          %([\"a\",\"b\",\"c\"])          ],
                   [ [1, 'a', :b, nil, false], %([1,\"a\",\"b\",null,false]) ]]

  RangeTests    = [[ 1..2,     %("1..2")],
                   [ 1...2,    %("1...2")],
                   [ 1.5..2.5, %("1.5..2.5")]]

  SymbolTests   = [[ :a,     %("a")    ],
                   [ :this,  %("this") ],
                   [ :"a b", %("a b")  ]]

  ObjectTests   = [[ Foo.new(1, 2), %({\"a\":1,\"b\":2}) ]]
  HashlikeTests = [[ Hashlike.new, %({\"bar\":\"world\",\"foo\":\"hello\"}) ]]
  CustomTests   = [[ Custom.new, '"custom"' ]]

  RegexpTests   = [[ /^a/, '"(?-mix:^a)"' ], [/^\w{1,2}[a-z]+/ix, '"(?ix-m:^\\\\w{1,2}[a-z]+)"']]

  DateTests     = [[ Date.new(2005,2,1), %("2005/02/01") ]]
  TimeTests     = [[ Time.utc(2005,2,1,15,15,10), %("2005/02/01 15:15:10 +0000") ]]
  DateTimeTests = [[ DateTime.civil(2005,2,1,15,15,10), %("2005/02/01 15:15:10 +0000") ]]

  StandardDateTests     = [[ Date.new(2005,2,1), %("2005-02-01") ]]
  StandardTimeTests     = [[ Time.utc(2005,2,1,15,15,10), %("2005-02-01T15:15:10Z") ]]
  StandardDateTimeTests = [[ DateTime.civil(2005,2,1,15,15,10), %("2005-02-01T15:15:10+00:00") ]]
  StandardStringTests   = [[ 'this is the <string>', %("this is the <string>")]]

  def sorted_json(json)
    return json unless json =~ /^\{.*\}$/
    '{' + json[1..-2].split(',').sort.join(',') + '}'
  end

  constants.grep(/Tests$/).each do |class_tests|
    define_method("test_#{class_tests[0..-6].underscore}") do
      begin
        prev = ActiveSupport.use_standard_json_time_format

        ActiveSupport.escape_html_entities_in_json  = class_tests !~ /^Standard/
        ActiveSupport.use_standard_json_time_format = class_tests =~ /^Standard/
        self.class.const_get(class_tests).each do |pair|
          assert_equal pair.last, sorted_json(ActiveSupport::JSON.encode(pair.first))
        end
      ensure
        ActiveSupport.escape_html_entities_in_json  = false
        ActiveSupport.use_standard_json_time_format = prev
      end
    end
  end

  def test_process_status
    # There doesn't seem to be a good way to get a handle on a Process::Status object without actually
    # creating a child process, hence this to populate $?
    system("not_a_real_program_#{SecureRandom.hex}")
    assert_equal %({"exitstatus":#{$?.exitstatus},"pid":#{$?.pid}}), ActiveSupport::JSON.encode($?)
  end

  def test_hash_encoding
    assert_equal %({\"a\":\"b\"}), ActiveSupport::JSON.encode(:a => :b)
    assert_equal %({\"a\":1}), ActiveSupport::JSON.encode('a' => 1)
    assert_equal %({\"a\":[1,2]}), ActiveSupport::JSON.encode('a' => [1,2])
    assert_equal %({"1":2}), ActiveSupport::JSON.encode(1 => 2)

    assert_equal %({\"a\":\"b\",\"c\":\"d\"}), sorted_json(ActiveSupport::JSON.encode(:a => :b, :c => :d))
  end

  def test_utf8_string_encoded_properly
    result = ActiveSupport::JSON.encode('€2.99')
    assert_equal '"€2.99"', result
    assert_equal(Encoding::UTF_8, result.encoding)

    result = ActiveSupport::JSON.encode('✎☺')
    assert_equal '"✎☺"', result
    assert_equal(Encoding::UTF_8, result.encoding)
  end

  def test_non_utf8_string_transcodes
    s = '二'.encode('Shift_JIS')
    result = ActiveSupport::JSON.encode(s)
    assert_equal '"二"', result
    assert_equal Encoding::UTF_8, result.encoding
  end

  def test_wide_utf8_chars
    w = '𠜎'
    result = ActiveSupport::JSON.encode(w)
    assert_equal '"𠜎"', result
  end

  def test_wide_utf8_roundtrip
    hash = { string: "𐒑" }
    json = ActiveSupport::JSON.encode(hash)
    decoded_hash = ActiveSupport::JSON.decode(json)
    assert_equal "𐒑", decoded_hash['string']
  end

  def test_exception_raised_when_encoding_circular_reference_in_array
    a = [1]
    a << a
    assert_deprecated do
      assert_raise(ActiveSupport::JSON::Encoding::CircularReferenceError) { ActiveSupport::JSON.encode(a) }
    end
  end

  def test_exception_raised_when_encoding_circular_reference_in_hash
    a = { :name => 'foo' }
    a[:next] = a
    assert_deprecated do
      assert_raise(ActiveSupport::JSON::Encoding::CircularReferenceError) { ActiveSupport::JSON.encode(a) }
    end
  end

  def test_exception_raised_when_encoding_circular_reference_in_hash_inside_array
    a = { :name => 'foo', :sub => [] }
    a[:sub] << a
    assert_deprecated do
      assert_raise(ActiveSupport::JSON::Encoding::CircularReferenceError) { ActiveSupport::JSON.encode(a) }
    end
  end

  def test_hash_key_identifiers_are_always_quoted
    values = {0 => 0, 1 => 1, :_ => :_, "$" => "$", "a" => "a", :A => :A, :A0 => :A0, "A0B" => "A0B"}
    assert_equal %w( "$" "A" "A0" "A0B" "_" "a" "0" "1" ).sort, object_keys(ActiveSupport::JSON.encode(values))
  end

  def test_hash_should_allow_key_filtering_with_only
    assert_equal %({"a":1}), ActiveSupport::JSON.encode({'a' => 1, :b => 2, :c => 3}, :only => 'a')
  end

  def test_hash_should_allow_key_filtering_with_except
    assert_equal %({"b":2}), ActiveSupport::JSON.encode({'foo' => 'bar', :b => 2, :c => 3}, :except => ['foo', :c])
  end

  def test_time_to_json_includes_local_offset
    prev = ActiveSupport.use_standard_json_time_format
    ActiveSupport.use_standard_json_time_format = true
    with_env_tz 'US/Eastern' do
      assert_equal %("2005-02-01T15:15:10-05:00"), ActiveSupport::JSON.encode(Time.local(2005,2,1,15,15,10))
    end
  ensure
    ActiveSupport.use_standard_json_time_format = prev
  end

  def test_hash_with_time_to_json
    prev = ActiveSupport.use_standard_json_time_format
    ActiveSupport.use_standard_json_time_format = false
    assert_equal '{"time":"2009/01/01 00:00:00 +0000"}', { :time => Time.utc(2009) }.to_json
  ensure
    ActiveSupport.use_standard_json_time_format = prev
  end

  def test_nested_hash_with_float
    assert_nothing_raised do
      hash = {
        "CHI" => {
          :display_name => "chicago",
          :latitude => 123.234
        }
      }
      ActiveSupport::JSON.encode(hash)
    end
  end

  def test_hash_like_with_options
    h = Hashlike.new
    json = h.to_json :only => [:foo]

    assert_equal({"foo"=>"hello"}, JSON.parse(json))
  end

  def test_object_to_json_with_options
    obj = Object.new
    obj.instance_variable_set :@foo, "hello"
    obj.instance_variable_set :@bar, "world"
    json = obj.to_json :only => ["foo"]

    assert_equal({"foo"=>"hello"}, JSON.parse(json))
  end

  def test_struct_to_json_with_options
    struct = Struct.new(:foo, :bar).new
    struct.foo = "hello"
    struct.bar = "world"
    json = struct.to_json :only => [:foo]

    assert_equal({"foo"=>"hello"}, JSON.parse(json))
  end

  def test_hash_should_pass_encoding_options_to_children_in_as_json
    person = {
      :name => 'John',
      :address => {
        :city => 'London',
        :country => 'UK'
      }
    }
    json = person.as_json :only => [:address, :city]

    assert_equal({ 'address' => { 'city' => 'London' }}, json)
  end

  def test_hash_should_pass_encoding_options_to_children_in_to_json
    person = {
      :name => 'John',
      :address => {
        :city => 'London',
        :country => 'UK'
      }
    }
    json = person.to_json :only => [:address, :city]

    assert_equal(%({"address":{"city":"London"}}), json)
  end

  def test_array_should_pass_encoding_options_to_children_in_as_json
    people = [
      { :name => 'John', :address => { :city => 'London', :country => 'UK' }},
      { :name => 'Jean', :address => { :city => 'Paris' , :country => 'France' }}
    ]
    json = people.as_json :only => [:address, :city]
    expected = [
      { 'address' => { 'city' => 'London' }},
      { 'address' => { 'city' => 'Paris' }}
    ]

    assert_equal(expected, json)
  end

  def test_array_should_pass_encoding_options_to_children_in_to_json
    people = [
      { :name => 'John', :address => { :city => 'London', :country => 'UK' }},
      { :name => 'Jean', :address => { :city => 'Paris' , :country => 'France' }}
    ]
    json = people.to_json :only => [:address, :city]

    assert_equal(%([{"address":{"city":"London"}},{"address":{"city":"Paris"}}]), json)
  end

  def test_enumerable_should_pass_encoding_options_to_children_in_as_json
    people = [
      { :name => 'John', :address => { :city => 'London', :country => 'UK' }},
      { :name => 'Jean', :address => { :city => 'Paris' , :country => 'France' }}
    ]
    json = people.each.as_json :only => [:address, :city]
    expected = [
      { 'address' => { 'city' => 'London' }},
      { 'address' => { 'city' => 'Paris' }}
    ]

    assert_equal(expected, json)
  end

  def test_enumerable_should_pass_encoding_options_to_children_in_to_json
    people = [
      { :name => 'John', :address => { :city => 'London', :country => 'UK' }},
      { :name => 'Jean', :address => { :city => 'Paris' , :country => 'France' }}
    ]
    json = people.each.to_json :only => [:address, :city]

    assert_equal(%([{"address":{"city":"London"}},{"address":{"city":"Paris"}}]), json)
  end

  def test_to_json_should_not_keep_options_around
    f = CustomWithOptions.new
    f.foo = "hello"
    f.bar = "world"

    hash = {"foo" => f, "other_hash" => {"foo" => "other_foo", "test" => "other_test"}}
    assert_equal({"foo"=>{"foo"=>"hello","bar"=>"world"},
                  "other_hash" => {"foo"=>"other_foo","test"=>"other_test"}}, ActiveSupport::JSON.decode(hash.to_json))
  end

  def test_struct_encoding
    Struct.new('UserNameAndEmail', :name, :email)
    Struct.new('UserNameAndDate', :name, :date)
    Struct.new('Custom', :name, :sub)
    user_email = Struct::UserNameAndEmail.new 'David', 'sample@example.com'
    user_birthday = Struct::UserNameAndDate.new 'David', Date.new(2010, 01, 01)
    custom = Struct::Custom.new 'David', user_birthday


    json_strings = ""
    json_string_and_date = ""
    json_custom = ""

    assert_nothing_raised do
      json_strings = user_email.to_json
      json_string_and_date = user_birthday.to_json
      json_custom = custom.to_json
    end

    assert_equal({"name" => "David",
                  "sub" => {
                    "name" => "David",
                    "date" => "2010-01-01" }}, ActiveSupport::JSON.decode(json_custom))

    assert_equal({"name" => "David", "email" => "sample@example.com"},
                 ActiveSupport::JSON.decode(json_strings))

    assert_equal({"name" => "David", "date" => "2010-01-01"},
                 ActiveSupport::JSON.decode(json_string_and_date))
  end

  def test_opt_out_big_decimal_string_serialization
    big_decimal = BigDecimal('2.5')

    begin
      ActiveSupport.encode_big_decimal_as_string = false
      assert_equal big_decimal.to_s, big_decimal.to_json
    ensure
      ActiveSupport.encode_big_decimal_as_string = true
    end
  end

  def test_nil_true_and_false_represented_as_themselves
    assert_equal nil,   nil.as_json
    assert_equal true,  true.as_json
    assert_equal false, false.as_json
  end

  protected

    def object_keys(json_object)
      json_object[1..-2].scan(/([^{}:,\s]+):/).flatten.sort
    end

    def with_env_tz(new_tz = 'US/Eastern')
      old_tz, ENV['TZ'] = ENV['TZ'], new_tz
      yield
    ensure
      old_tz ? ENV['TZ'] = old_tz : ENV.delete('TZ')
    end
end