summaryrefslogtreecommitdiff
path: root/test/ruby/test_class.rb
blob: ad2caeb8beb7f220d6ab7d8e5cfc2ad682e7062a (plain)
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
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
# frozen_string_literal: false
require 'test/unit'

class TestClass < Test::Unit::TestCase
  # ------------------
  # Various test classes
  # ------------------

  class ClassOne
    attr :num_args
    @@subs = []
    def initialize(*args)
      @num_args = args.size
      @args = args
    end
    def [](n)
      @args[n]
    end
    def ClassOne.inherited(klass)
      @@subs.push klass
    end
    def subs
      @@subs
    end
  end

  class ClassTwo < ClassOne
  end

  class ClassThree < ClassOne
  end

  class ClassFour < ClassThree
  end

  # ------------------
  # Start of tests
  # ------------------

  def test_s_inherited
    assert_equal([ClassTwo, ClassThree, ClassFour], ClassOne.new.subs)
  end

  def test_s_new
    c = Class.new
    assert_same(Class, c.class)
    assert_same(Object, c.superclass)

    c = Class.new(Integer)
    assert_same(Class, c.class)
    assert_same(Integer, c.superclass)
  end

  def test_00_new_basic
    a = ClassOne.new
    assert_equal(ClassOne, a.class)
    assert_equal(0, a.num_args)

    a = ClassOne.new(1, 2, 3)
    assert_equal(3, a.num_args)
    assert_equal(1, a[0])
  end

  def test_01_new_inherited
    a = ClassTwo.new
    assert_equal(ClassTwo, a.class)
    assert_equal(0, a.num_args)

    a = ClassTwo.new(1, 2, 3)
    assert_equal(3, a.num_args)
    assert_equal(1, a[0])
  end

  def test_superclass
    assert_equal(ClassOne, ClassTwo.superclass)
    assert_equal(Object,   ClassTwo.superclass.superclass)
    assert_equal(BasicObject, ClassTwo.superclass.superclass.superclass)
  end

  def test_class_cmp
    assert_raise(TypeError) { Class.new <= 1 }
    assert_raise(TypeError) { Class.new >= 1 }
    assert_nil(Class.new <=> 1)
  end

  def test_class_initialize
    assert_raise(TypeError) do
      Class.new.instance_eval { initialize }
    end
  end

  def test_instantiate_singleton_class
    c = class << Object.new; self; end
    assert_raise(TypeError) { c.new }
  end

  def test_superclass_of_basicobject
    assert_equal(nil, BasicObject.superclass)
  end

  def test_module_function
    c = Class.new
    assert_raise(TypeError) do
      Module.instance_method(:module_function).bind(c).call(:foo)
    end
  end

  def test_extend_object
    c = Class.new
    assert_raise(TypeError) do
      Module.instance_method(:extend_object).bind(c).call(Object.new)
    end
  end

  def test_append_features
    c = Class.new
    assert_raise(TypeError) do
      Module.instance_method(:append_features).bind(c).call(Module.new)
    end
  end

  def test_prepend_features
    c = Class.new
    assert_raise(TypeError) do
      Module.instance_method(:prepend_features).bind(c).call(Module.new)
    end
  end

  def test_module_specific_methods
    assert_empty(Class.private_instance_methods(true) &
      [:module_function, :extend_object, :append_features, :prepend_features])
  end

  def test_method_redefinition
    feature2155 = '[ruby-dev:39400]'

    line = __LINE__+4
    stderr = EnvUtil.verbose_warning do
      Class.new do
        def foo; end
        def foo; end
      end
    end
    assert_match(/:#{line}: warning: method redefined; discarding old foo/, stderr)
    assert_match(/:#{line-1}: warning: previous definition of foo/, stderr, feature2155)

    assert_warning '' do
      Class.new do
        def foo; end
        alias bar foo
        def foo; end
      end
    end

    assert_warning '' do
      Class.new do
        def foo; end
        alias bar foo
        alias bar foo
      end
    end

    line = __LINE__+4
    stderr = EnvUtil.verbose_warning do
      Class.new do
        define_method(:foo) do end
        def foo; end
      end
    end
    assert_match(/:#{line}: warning: method redefined; discarding old foo/, stderr)
    assert_match(/:#{line-1}: warning: previous definition of foo/, stderr, feature2155)

    assert_warning '' do
      Class.new do
        define_method(:foo) do end
        alias bar foo
        alias bar foo
      end
    end

    assert_warning '' do
      Class.new do
        def foo; end
        undef foo
      end
    end
  end

  def test_check_inheritable
    assert_raise(TypeError) { Class.new(Object.new) }

    o = Object.new
    c = class << o; self; end
    assert_raise(TypeError) { Class.new(c) }
    assert_raise(TypeError) { Class.new(Class) }
    assert_raise(TypeError) { eval("class Foo < Class; end") }
    m = "M\u{1f5ff}"
    o = Class.new {break eval("class #{m}; self; end.new")}
    assert_raise_with_message(TypeError, /#{m}/) {Class.new(o)}
  end

  def test_initialize_copy
    c = Class.new
    assert_raise(TypeError) { c.instance_eval { initialize_copy(1) } }

    o = Object.new
    c = class << o; self; end
    assert_raise(TypeError) { c.dup }

    assert_raise(TypeError) { BasicObject.dup }
  end

  def test_singleton_class
    assert_raise(TypeError) { 1.extend(Module.new) }
    assert_raise(TypeError) { 1.0.extend(Module.new) }
    assert_raise(TypeError) { (2.0**1000).extend(Module.new) }
    assert_raise(TypeError) { :foo.extend(Module.new) }

    assert_in_out_err([], <<-INPUT, %w(:foo :foo true true), [])
      module Foo; def foo; :foo; end; end
      false.extend(Foo)
      true.extend(Foo)
      p false.foo
      p true.foo
      p FalseClass.include?(Foo)
      p TrueClass.include?(Foo)
    INPUT
  end

  def test_uninitialized
    assert_raise(TypeError) { Class.allocate.new }
    assert_raise(TypeError) { Class.allocate.superclass }
    bug6863 = '[ruby-core:47148]'
    assert_raise(TypeError, bug6863) { Class.new(Class.allocate) }
  end

  def test_nonascii_name
    c = eval("class ::C\u{df}; self; end")
    assert_equal("C\u{df}", c.name, '[ruby-core:24600]')
    c = eval("class C\u{df}; self; end")
    assert_equal("TestClass::C\u{df}", c.name, '[ruby-core:24600]')
  end

  def test_invalid_next_from_class_definition
    assert_raise(SyntaxError) { eval("class C; next; end") }
  end

  def test_invalid_break_from_class_definition
    assert_raise(SyntaxError) { eval("class C; break; end") }
  end

  def test_invalid_redo_from_class_definition
    assert_raise(SyntaxError) { eval("class C; redo; end") }
  end

  def test_invalid_retry_from_class_definition
    assert_raise(SyntaxError) { eval("class C; retry; end") }
  end

  def test_invalid_return_from_class_definition
    assert_raise(SyntaxError) { eval("class C; return; end") }
  end

  def test_invalid_yield_from_class_definition
    assert_raise(LocalJumpError) { eval("class C; yield; end") }
  end

  def test_clone
    original = Class.new {
      def foo
        return super()
      end
    }
    mod = Module.new {
      def foo
        return "mod#foo"
      end
    }
    copy = original.clone
    copy.send(:include, mod)
    assert_equal("mod#foo", copy.new.foo)
  end

  def test_nested_class_removal
    assert_normal_exit('File.__send__(:remove_const, :Stat); at_exit{File.stat(".")}; GC.start')
  end

  class PrivateClass
  end
  private_constant :PrivateClass

  def test_redefine_private_class
    assert_raise(NameError) do
      eval("class ::TestClass::PrivateClass; end")
    end
    eval <<-END
      class ::TestClass
        class PrivateClass
          def foo; 42; end
        end
      end
    END
    assert_equal(42, PrivateClass.new.foo)
  end

  StrClone = String.clone
  Class.new(StrClone)

  def test_cloned_class
    bug5274 = StrClone.new("[ruby-dev:44460]")
    assert_equal(bug5274, Marshal.load(Marshal.dump(bug5274)))
  end

  def test_cannot_reinitialize_class_with_initialize_copy # [ruby-core:50869]
    assert_in_out_err([], "#{<<~"begin;"}\n#{<<~'end;'}", ["Object"], [])
    begin;
      class Class
        def initialize_copy(*); super; end
      end

      class A; end
      class B; end

      A.send(:initialize_copy, Class.new(B)) rescue nil

      p A.superclass
    end;
  end

  module M
    C = 1

    def self.m
      C
    end
  end

  def test_constant_access_from_method_in_cloned_module # [ruby-core:47834]
    m = M.dup
    assert_equal 1, m::C
    assert_equal 1, m.m
  end

  def test_invalid_superclass
    assert_raise(TypeError) do
      eval <<-'end;'
        class C < nil
        end
      end;
    end

    assert_raise(TypeError) do
      eval <<-'end;'
        class C < false
        end
      end;
    end

    assert_raise(TypeError) do
      eval <<-'end;'
        class C < true
        end
      end;
    end

    assert_raise(TypeError) do
      eval <<-'end;'
        class C < 0
        end
      end;
    end

    assert_raise(TypeError) do
      eval <<-'end;'
        class C < ""
        end
      end;
    end

    m = Module.new
    n = "M\u{1f5ff}"
    c = m.module_eval "class #{n}; new; end"
    assert_raise_with_message(TypeError, /#{n}/) {
      eval <<-"end;"
        class C < c
        end
      end;
    }
    assert_raise_with_message(TypeError, /#{n}/) {
      Class.new(c)
    }
    assert_raise_with_message(TypeError, /#{n}/) {
      m.module_eval "class #{n} < Class.new; end"
    }
  end

  define_method :test_invalid_reset_superclass do
    class A; end
    class SuperclassCannotBeReset < A
    end
    assert_equal A, SuperclassCannotBeReset.superclass

    assert_raise_with_message(TypeError, /superclass mismatch/) {
      class SuperclassCannotBeReset < String
      end
    }

    assert_raise_with_message(TypeError, /superclass mismatch/, "[ruby-core:75446]") {
      class SuperclassCannotBeReset < Object
      end
    }

    assert_equal A, SuperclassCannotBeReset.superclass
  end

  def test_cloned_singleton_method_added
    bug5283 = '[ruby-dev:44477]'
    added = []
    c = Class.new
    c.singleton_class.class_eval do
      define_method(:singleton_method_added) {|mid| added << [self, mid]}
      def foo; :foo; end
    end
    added.clear
    d = c.clone
    assert_empty(added.grep(->(k) {c == k[0]}), bug5283)
    assert_equal(:foo, d.foo)
  end

  def test_singleton_class_p
    feature7609 = '[ruby-core:51087] [Feature #7609]'
    assert_predicate(self.singleton_class, :singleton_class?, feature7609)
    assert_not_predicate(self.class, :singleton_class?, feature7609)
  end

  def test_freeze_to_s
    assert_nothing_raised("[ruby-core:41858] [Bug #5828]") {
      Class.new.freeze.clone.to_s
    }
  end

  def test_singleton_class_of_frozen_object
    obj = Object.new
    c = obj.singleton_class
    obj.freeze
    assert_raise_with_message(FrozenError, /frozen object/) {
      c.class_eval {def f; end}
    }
  end

  def test_singleton_class_message
    c = Class.new.freeze
    assert_raise_with_message(FrozenError, /frozen Class/) {
      def c.f; end
    }
  end

  def test_singleton_class_should_has_own_namespace
    # CONST in singleton class
    objs = []
    $i = 0

    2.times{
      objs << obj = Object.new
      class << obj
        CONST = ($i += 1)
        def foo
          CONST
        end
      end
    }
    assert_equal(1, objs[0].foo, '[Bug #10943]')
    assert_equal(2, objs[1].foo, '[Bug #10943]')

    # CONST in block in singleton class
    objs = []
    $i = 0

    2.times{
      objs << obj = Object.new
      class << obj
        1.times{
          CONST = ($i += 1)
        }
        def foo
          [nil].map{
            CONST
          }
        end
      end
    }
    assert_equal([1], objs[0].foo, '[Bug #10943]')
    assert_equal([2], objs[1].foo, '[Bug #10943]')

    # class def in singleton class
    objs = []
    $xs = []
    $i = 0

    2.times{
      objs << obj = Object.new
      class << obj
        CONST = ($i += 1)
        class X
          $xs << self
          CONST = ($i += 1)
          def foo
            CONST
          end
        end

        def x
          X
        end
      end
    }
    assert_not_equal($xs[0], $xs[1], '[Bug #10943]')
    assert_not_equal(objs[0].x, objs[1].x, '[Bug #10943]')
    assert_equal(2, $xs[0]::CONST, '[Bug #10943]')
    assert_equal(2, $xs[0].new.foo, '[Bug #10943]')
    assert_equal(4, $xs[1]::CONST, '[Bug #10943]')
    assert_equal(4, $xs[1].new.foo, '[Bug #10943]')

    # class def in block in singleton class
    objs = []
    $xs = []
    $i = 0

    2.times{
      objs << obj = Object.new
      class << obj
        1.times{
          CONST = ($i += 1)
        }
        1.times{
          class X
            $xs << self
            CONST = ($i += 1)
            def foo
              CONST
            end
          end

          def x
            X
          end
        }
      end
    }
    assert_not_equal($xs[0], $xs[1], '[Bug #10943]')
    assert_not_equal(objs[0].x, objs[1].x, '[Bug #10943]')
    assert_equal(2, $xs[0]::CONST, '[Bug #10943]')
    assert_equal(2, $xs[0].new.foo, '[Bug #10943]')
    assert_equal(4, $xs[1]::CONST, '[Bug #10943]')
    assert_equal(4, $xs[1].new.foo, '[Bug #10943]')

    # method def in singleton class
    ms = []
    ps = $test_singleton_class_shared_cref_ps = []
    2.times{
      ms << Module.new do
        class << self
          $test_singleton_class_shared_cref_ps << Proc.new{
            def xyzzy
              self
            end
          }
        end
      end
    }

    ps.each{|p| p.call} # define xyzzy methods for each singleton classes
    ms.each{|m|
      assert_equal(m, m.xyzzy, "Bug #10871")
    }
  end

  def test_namescope_error_message
    m = Module.new
    o = m.module_eval "class A\u{3042}; self; end.new"
    assert_raise_with_message(TypeError, /A\u{3042}/) {
      o::Foo
    }
  end

  def test_redefinition_mismatch
    m = Module.new
    m.module_eval "A = 1"
    assert_raise_with_message(TypeError, /is not a class/) {
      m.module_eval "class A; end"
    }
    n = "M\u{1f5ff}"
    m.module_eval "#{n} = 42"
    assert_raise_with_message(TypeError, "#{n} is not a class") {
      m.module_eval "class #{n}; end"
    }

    assert_separately([], "#{<<~"begin;"}\n#{<<~"end;"}")
    begin;
      Date = (class C\u{1f5ff}; self; end).new
      assert_raise_with_message(TypeError, /C\u{1f5ff}/) {
        require 'date'
      }
    end;
  end

  def test_should_not_expose_singleton_class_without_metaclass
    assert_normal_exit "#{<<~"begin;"}\n#{<<~'end;'}", '[Bug #11740]'
    begin;
      klass = Class.new(Array)
      # The metaclass of +klass+ should handle #bla since it should inherit methods from meta:meta:Array
      def (Array.singleton_class).bla; :bla; end
      hidden = ObjectSpace.each_object(Class).find { |c| klass.is_a? c and c.inspect.include? klass.inspect }
      raise unless hidden.nil?
    end;

    assert_normal_exit "#{<<~"begin;"}\n#{<<~'end;'}", '[Bug #11740]'
    begin;
      klass = Class.new(Array)
      klass.singleton_class
      # The metaclass of +klass+ should handle #bla since it should inherit methods from meta:meta:Array
      def (Array.singleton_class).bla; :bla; end
      hidden = ObjectSpace.each_object(Class).find { |c| klass.is_a? c and c.inspect.include? klass.inspect }
      raise if hidden.nil?
    end;

  end
end