summaryrefslogtreecommitdiff
path: root/test/ruby/test_defined.rb
blob: 6c63c7fb27cbb0c1f97fc4e4925676fbff4a69a7 (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
require 'test/unit'
require_relative 'envutil'

class TestDefined < Test::Unit::TestCase
  class Foo
    def foo
      p :foo
    end
    protected :foo
    def bar(f)
      yield(defined?(self.foo))
      yield(defined?(f.foo))
    end
    def baz(f)
    end
    attr_accessor :attr
    def attrasgn_test
      yield(defined?(self.attr = 1))
    end
  end

  def defined_test
    return !defined?(yield)
  end

  def test_defined
    $x = nil

    assert(defined?($x))		# global variable
    assert_equal('global-variable', defined?($x))# returns description

    assert_nil(defined?(foo))		# undefined
    foo=5
    assert(defined?(foo))		# local variable

    assert(defined?(Array))		# constant
    assert(defined?(::Array))		# toplevel constant
    assert(defined?(File::Constants))	# nested constant
    assert(defined?(Object.new))	# method
    assert(defined?(Object::new))	# method
    assert(!defined?(Object.print))	# private method
    assert(defined?(1 == 2))		# operator expression

    f = Foo.new
    assert_nil(defined?(f.foo))         # protected method
    f.bar(f) { |v| assert(v) }
    assert_nil(defined?(f.quux))        # undefined method
    assert_nil(defined?(f.baz(x)))      # undefined argument
    x = 0
    assert(defined?(f.baz(x)))
    assert_nil(defined?(f.quux(x)))
    assert(defined?(print(x)))
    assert_nil(defined?(quux(x)))
    assert(defined?(f.attr = 1))
    f.attrasgn_test { |v| assert(v) }

    assert(defined_test)		# not iterator
    assert(!defined_test{})	        # called as iterator

    /a/ =~ ''
    assert_equal nil, defined?($&)
    assert_equal nil, defined?($`)
    assert_equal nil, defined?($')
    assert_equal nil, defined?($+)
    assert_equal nil, defined?($1)
    assert_equal nil, defined?($2)
    /a/ =~ 'a'
    assert_equal 'global-variable', defined?($&)
    assert_equal 'global-variable', defined?($`)
    assert_equal 'global-variable', defined?($') # '
    assert_equal nil, defined?($+)
    assert_equal nil, defined?($1)
    assert_equal nil, defined?($2)
    /(a)/ =~ 'a'
    assert_equal 'global-variable', defined?($&)
    assert_equal 'global-variable', defined?($`)
    assert_equal 'global-variable', defined?($') # '
    assert_equal 'global-variable', defined?($+)
    assert_equal 'global-variable', defined?($1)
    assert_equal nil, defined?($2)
    /(a)b/ =~ 'ab'
    assert_equal 'global-variable', defined?($&)
    assert_equal 'global-variable', defined?($`)
    assert_equal 'global-variable', defined?($') # '
    assert_equal 'global-variable', defined?($+)
    assert_equal 'global-variable', defined?($1)
    assert_equal nil, defined?($2)

    assert_equal("nil", defined?(nil))
    assert_equal("true", defined?(true))
    assert_equal("false", defined?(false))
    assert_equal("expression", defined?(1))

    bug8224 = '[ruby-core:54024] [Bug #8224]'
    (1..3).each do |level|
      expr = "("*level+")"*level
      assert_equal("nil", eval("defined? #{expr}"), "#{bug8224} defined? #{expr}")
      assert_equal("nil", eval("defined?(#{expr})"), "#{bug8224} defined?(#{expr})")
    end
  end

  def test_defined_impl_specific
    feature7035 = '[ruby-core:47558]' # not spec
    assert_predicate(defined?(Foo), :frozen?, feature7035)
    assert_same(defined?(Foo), defined?(Array), feature7035)
  end

  class TestAutoloadedSuperclass
    autoload :A, "a"
  end

  class TestAutoloadedSubclass < TestAutoloadedSuperclass
    def a?
      defined?(A)
    end
  end

  def test_autoloaded_subclass
    bug = "[ruby-core:35509]"

    x = TestAutoloadedSuperclass.new
    class << x
      def a?; defined?(A); end
    end
    assert_equal("constant", x.a?, bug)

    assert_equal("constant", TestAutoloadedSubclass.new.a?, bug)
  end

  class TestAutoloadedNoload
    autoload :A, "a"
    def a?
      defined?(A)
    end
    def b?
      defined?(A::B)
    end
  end

  def test_autoloaded_noload
    loaded = $".dup
    $".clear
    loadpath = $:.dup
    $:.clear
    x = TestAutoloadedNoload.new
    assert_equal("constant", x.a?)
    assert_nil(x.b?)
    assert_equal([], $")
  ensure
    $".replace(loaded)
    $:.replace(loadpath)
  end

  def test_exception
    bug5786 = '[ruby-dev:45021]'
    assert_nil(defined?(raise("[Bug#5786]")::A), bug5786)
  end

  def test_define_method
    bug6644 = '[ruby-core:45831]'
    a = Class.new do
      def self.def_f!;
        singleton_class.send(:define_method, :f) { defined? super }
      end
    end
    aa = Class.new(a)
    a.def_f!
    assert_nil(a.f)
    assert_nil(aa.f)
    aa.def_f!
    assert_equal("super", aa.f, bug6644)
    assert_nil(a.f, bug6644)
  end

  def test_super_in_included_method
    c0 = Class.new do
      def m
      end
    end
    m1 = Module.new do
      def m
        defined?(super)
      end
    end
    c = Class.new(c0) do include m1
      def m
        super
      end
    end
    assert_equal("super", c.new.m)
  end

  def test_super_in_block
    bug8367 = '[ruby-core:54769] [Bug #8367]'
    c = Class.new do
      def x; end
    end

    m = Module.new do
      def b; yield; end
      def x; b {return defined?(super)}; end
    end

    o = c.new
    o.extend(m)
    assert_equal("super", o.x)
  end

  def test_super_toplevel
    assert_separately([], "assert_nil(defined?(super))")
  end
end