summaryrefslogtreecommitdiff
path: root/test/test_delegate.rb
blob: 5320520de399e3dcc6a0ba3e6e7e24d26969ddf6 (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
# frozen_string_literal: true
require 'test/unit'
require 'delegate'

class TestDelegateClass < Test::Unit::TestCase
  module PP
    def mu_pp(obj)
      str = super
      str = "#<#{obj.class}: #{str}>" if Delegator === obj
      str
    end
  end

  module M
    attr_reader :m
  end

  def test_extend
    obj = DelegateClass(Array).new([])
    obj.instance_eval { @m = :m }
    obj.extend M
    assert_equal(:m, obj.m, "[ruby-dev:33116]")
  end

  def test_systemcallerror_eq
    e = SystemCallError.new(0)
    assert((SimpleDelegator.new(e) == e) == (e == SimpleDelegator.new(e)), "[ruby-dev:34808]")
  end

  class Myclass < DelegateClass(Array);end

  def test_delegateclass_class
    myclass=Myclass.new([])
    assert_equal(Myclass,myclass.class)
    assert_equal(Myclass,myclass.dup.class,'[ruby-dev:40313]')
    assert_equal(Myclass,myclass.clone.class,'[ruby-dev:40313]')
  end

  def test_simpledelegator_class
    simple=SimpleDelegator.new([])
    assert_equal(SimpleDelegator,simple.class)
    assert_equal(SimpleDelegator,simple.dup.class)
    assert_equal(SimpleDelegator,simple.clone.class)
  end

  class Object
    def m
      :o
    end
    private
    def delegate_test_m
      :o
    end
  end

  class Foo
    def m
      :m
    end
    def delegate_test_m
      :m
    end
  end

  class Bar < DelegateClass(Foo)
  end

  def test_override
    foo = Foo.new
    foo2 = SimpleDelegator.new(foo)
    bar = Bar.new(foo)
    assert_equal(:o, Object.new.m)
    assert_equal(:m, foo.m)
    assert_equal(:m, foo2.m)
    assert_equal(:m, bar.m)
    bug = '[ruby-dev:39154]'
    assert_equal(:m, foo2.send(:delegate_test_m), bug)
    assert_equal(:m, bar.send(:delegate_test_m), bug)
  end

  class IV < DelegateClass(Integer)
    attr_accessor :var

    def initialize
      @var = 1
      super(0)
    end
  end

  def test_marshal
    bug1744 = '[ruby-core:24211]'
    c = IV.new
    assert_equal(1, c.var)
    d = Marshal.load(Marshal.dump(c))
    assert_equal(1, d.var, bug1744)
  end

  def test_copy_frozen
    bug2679 = '[ruby-dev:40242]'
    a = [42, :hello].freeze
    d = SimpleDelegator.new(a)
    assert_nothing_raised(bug2679) {d.dup[0] += 1}
    assert_raise(FrozenError) {d.clone[0] += 1}
    d.freeze
    assert(d.clone.frozen?)
    assert(!d.dup.frozen?)
  end

  def test_frozen
    d = SimpleDelegator.new([1, :foo])
    d.freeze
    assert_raise(FrozenError, '[ruby-dev:40314]#1') {d.__setobj__("foo")}
    assert_equal([1, :foo], d)
  end

  def test_instance_method
    s = SimpleDelegator.new("foo")
    m = s.method("upcase")
    s.__setobj__([1,2,3])
    assert_raise(NoMethodError, '[ruby-dev:40314]#3') {m.call}
  end

  def test_methods
    s = SimpleDelegator.new("foo")
    assert_equal([], s.methods(false))
    def s.bar; end
    assert_equal([:bar], s.methods(false))
  end

  def test_eql?
    extend PP
    s0 = SimpleDelegator.new("foo")
    s1 = SimpleDelegator.new("bar")
    s2 = SimpleDelegator.new("foo")
    assert_operator(s0, :eql?, s0)
    assert_operator(s0, :eql?, "foo")
    assert_operator(s0, :eql?, s2)
    assert_not_operator(s0, :eql?, s1)
    assert_not_operator(s0, :eql?, "bar")
  end

  class Foo
    private
    def delegate_test_private
      :m
    end
  end

  def test_private_method
    foo = Foo.new
    d = SimpleDelegator.new(foo)
    assert_raise(NoMethodError) {foo.delegate_test_private}
    assert_equal(:m, foo.send(:delegate_test_private))
    assert_raise(NoMethodError, '[ruby-dev:40314]#4') {d.delegate_test_private}
    assert_raise(NoMethodError, '[ruby-dev:40314]#5') {d.send(:delegate_test_private)}
  end

  def test_global_function
    klass = Class.new do
      def open
      end
    end
    obj = klass.new
    d = SimpleDelegator.new(obj)
    assert_nothing_raised(ArgumentError) {obj.open}
    assert_nothing_raised(ArgumentError) {d.open}
    assert_nothing_raised(ArgumentError) {d.send(:open)}
  end

  def test_send_method_in_delegator
    d = Class.new(SimpleDelegator) do
      def foo
        "foo"
      end
    end.new(Object.new)
    assert_equal("foo", d.send(:foo))
  end

  def test_unset_simple_delegator
    d = SimpleDelegator.allocate
    assert_raise_with_message(ArgumentError, /not delegated/) {
      d.__getobj__
    }
  end

  def test_unset_delegate_class
    d = IV.allocate
    assert_raise_with_message(ArgumentError, /not delegated/) {
      d.__getobj__
    }
  end

  class Bug9155 < DelegateClass(Integer)
    def initialize(value)
      super(Integer(value))
    end
  end

  def test_global_method_if_no_target
    bug9155 = '[ruby-core:58572] [Bug #9155]'
    x = assert_nothing_raised(ArgumentError, bug9155) {break Bug9155.new(1)}
    assert_equal(1, x.to_i, bug9155)
  end

  class Bug9403
    Name = '[ruby-core:59718] [Bug #9403]'
    SD = SimpleDelegator.new(new)
    class << SD
      def method_name
        __method__
      end
      def callee_name
        __callee__
      end
      alias aliased_name callee_name
      def dir_name
        __dir__
      end
    end
    dc = DelegateClass(self)
    dc.class_eval do
      def method_name
        __method__
      end
      def callee_name
        __callee__
      end
      alias aliased_name callee_name
      def dir_name
        __dir__
      end
    end
    DC = dc.new(new)
  end

  def test_method_in_simple_delegator
    assert_equal(:method_name, Bug9403::SD.method_name, Bug9403::Name)
  end

  def test_callee_in_simple_delegator
    assert_equal(:callee_name, Bug9403::SD.callee_name, Bug9403::Name)
    assert_equal(:aliased_name, Bug9403::SD.aliased_name, Bug9403::Name)
  end

  def test_dir_in_simple_delegator
    assert_equal(__dir__, Bug9403::SD.dir_name, Bug9403::Name)
  end

  def test_method_in_delegator_class
    assert_equal(:method_name, Bug9403::DC.method_name, Bug9403::Name)
  end

  def test_callee_in_delegator_class
    assert_equal(:callee_name, Bug9403::DC.callee_name, Bug9403::Name)
    assert_equal(:aliased_name, Bug9403::DC.aliased_name, Bug9403::Name)
  end

  def test_dir_in_delegator_class
    assert_equal(__dir__, Bug9403::DC.dir_name, Bug9403::Name)
  end
end