1 | ##
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2 | # Class ISO Test
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3 |
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4 | assert('Class', '15.2.3') do
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5 | assert_equal(Class, Class.class)
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6 | end
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7 |
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8 | assert('Class#initialize', '15.2.3.3.1') do
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9 | c = Class.new do
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10 | def test
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11 | :test
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12 | end
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13 | end.new
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14 |
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15 | assert_equal(c.test, :test)
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16 | end
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17 |
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18 | assert('Class#initialize_copy', '15.2.3.3.2') do
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19 | class TestClass
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20 | attr_accessor :n
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21 | def initialize(n)
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22 | @n = n
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23 | end
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24 | def initialize_copy(obj)
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25 | @n = n
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26 | end
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27 | end
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28 |
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29 | c1 = TestClass.new('Foo')
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30 | c2 = c1.dup
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31 | c3 = TestClass.new('Bar')
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32 |
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33 | assert_equal(c1.n, c2.n)
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34 | assert_not_equal(c1.n, c3.n)
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35 | end
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36 |
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37 | assert('Class#new', '15.2.3.3.3') do
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38 | assert_raise(TypeError, 'Singleton should raise TypeError') do
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39 | (class <<"a"; self; end).new
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40 | end
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41 |
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42 | class TestClass
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43 | def initialize args, &block
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44 | @result = if not args.nil? and block.nil?
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45 | # only arguments
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46 | :only_args
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47 | elsif not args.nil? and not block.nil?
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48 | # args and block is given
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49 | :args_and_block
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50 | else
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51 | # this should never happen
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52 | :broken
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53 | end
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54 | end
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55 |
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56 | def result; @result; end
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57 | end
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58 |
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59 | assert_equal(:only_args, TestClass.new(:arg).result)
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60 | # with block doesn't work yet
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61 | end
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62 |
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63 | assert('Class#superclass', '15.2.3.3.4') do
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64 | class SubClass < String; end
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65 | assert_equal(String, SubClass.superclass)
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66 | end
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67 |
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68 | # Not ISO specified
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69 |
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70 | assert('Class 1') do
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71 | class C1; end
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72 | assert_equal(Class, C1.class)
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73 | end
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74 |
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75 | assert('Class 2') do
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76 | class C2; end
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77 | assert_equal(C2, C2.new.class)
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78 | end
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79 |
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80 | assert('Class 3') do
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81 | class C3; end
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82 | assert_equal(Class, C3.new.class.class)
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83 | end
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84 |
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85 | assert('Class 4') do
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86 | class C4_A; end
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87 | class C4 < C4_A; end
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88 | assert_equal(Class, C4.class)
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89 | end
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90 |
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91 | assert('Class 5') do
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92 | class C5_A; end
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93 | class C5 < C5_A; end
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94 | assert_equal(C5, C5.new.class)
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95 | end
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96 |
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97 | assert('Class 6') do
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98 | class C6_A; end
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99 | class C6 < C6_A; end
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100 | assert_equal(Class, C6.new.class.class)
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101 | end
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102 |
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103 | assert('Class 7') do
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104 | class C7_A; end
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105 | class C7_B; end
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106 |
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107 | class C7 < C7_A; end
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108 |
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109 | assert_raise(TypeError) do
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110 | # Different superclass.
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111 | class C7 < C7_B; end
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112 | end
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113 | end
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114 |
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115 | assert('Class 8') do
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116 | class C8_A; end
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117 |
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118 | class C8; end # superclass is Object
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119 |
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120 | assert_raise(TypeError) do
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121 | # Different superclass.
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122 | class C8 < C8_A; end
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123 | end
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124 | end
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125 |
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126 | assert('Class 9') do
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127 | Class9Const = "a"
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128 |
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129 | assert_raise(TypeError) do
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130 | class Class9Const; end
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131 | end
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132 | end
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133 |
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134 | assert('Class Module 1') do
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135 | module M; end
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136 | assert_equal(Module, M.class)
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137 | end
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138 |
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139 | assert('Class Module 2') do
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140 | module M; end
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141 | class C; include M; end
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142 | assert_equal(C, C.new.class)
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143 | end
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144 |
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145 | # nested class
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146 | assert('Class Nested 1') do
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147 | class A; end
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148 | class A::B; end
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149 | assert_equal(A::B, A::B)
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150 | end
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151 |
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152 | assert('Class Nested 2') do
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153 | class A; end
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154 | class A::B; end
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155 | assert_equal(A::B, A::B.new.class)
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156 | end
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157 |
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158 | assert('Class Nested 3') do
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159 | class A; end
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160 | class A::B; end
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161 | assert_equal(Class, A::B.new.class.class)
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162 | end
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163 |
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164 | assert('Class Nested 4') do
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165 | class A; end
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166 | class A::B; end
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167 | class A::B::C; end
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168 | assert_equal(A::B::C, A::B::C)
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169 | end
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170 |
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171 | assert('Class Nested 5') do
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172 | class A; end
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173 | class A::B; end
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174 | class A::B::C; end
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175 | assert_equal(Class, A::B::C.class)
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176 | end
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177 |
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178 | assert('Class Nested 6') do
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179 | class A; end
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180 | class A::B; end
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181 | class A::B::C; end
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182 | assert_equal(A::B::C, A::B::C.new.class)
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183 | end
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184 |
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185 | assert('Class Nested 7') do
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186 | class A; end
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187 | class A::B; end
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188 | class A::B2 < A::B; end
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189 | assert_equal(A::B2, A::B2)
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190 | end
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191 |
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192 | assert('Class Nested 8') do
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193 | class A; end
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194 | class A::B; end
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195 | class A::B2 < A::B; end
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196 | assert_equal(Class, A::B2.class)
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197 | end
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198 |
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199 | assert('Class Colon 1') do
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200 | class A; end
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201 | A::C = 1
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202 | assert_equal(1, A::C)
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203 | end
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204 |
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205 | assert('Class Colon 2') do
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206 | class A; class ::C; end end
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207 | assert_equal(C, C)
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208 | end
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209 |
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210 | assert('Class Colon 3') do
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211 | class A; class ::C; end end
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212 | assert_equal(Class, C.class)
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213 | end
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214 |
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215 | assert('Class Dup 1') do
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216 | class C; end
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217 | assert_equal(Class, C.dup.class)
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218 | end
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219 |
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220 | assert('Class Dup 2') do
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221 | module M; end
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222 | assert_equal(Module, M.dup.class)
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223 | end
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224 |
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225 | assert('Class.new') do
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226 | assert_equal(Class, Class.new.class)
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227 | a = []
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228 | klass = Class.new do |c|
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229 | a << c
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230 | end
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231 | assert_equal([klass], a)
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232 | end
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233 |
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234 | assert('class to return the last value') do
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235 | m = class C; :m end
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236 | assert_equal(m, :m)
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237 | end
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238 |
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239 | assert('class to return nil if body is empty') do
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240 | assert_nil(class C end)
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241 | assert_nil(class << self; end)
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242 | end
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243 |
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244 | assert('raise when superclass is not a class') do
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245 | module FirstModule; end
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246 | assert_raise(TypeError, 'should raise TypeError') do
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247 | class FirstClass < FirstModule; end
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248 | end
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249 |
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250 | class SecondClass; end
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251 | assert_raise(TypeError, 'should raise TypeError') do
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252 | class SecondClass < false; end
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253 | end
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254 |
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255 | class ThirdClass; end
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256 | assert_raise(TypeError, 'should raise TypeError') do
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257 | class ThirdClass < ThirdClass; end
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258 | end
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259 | end
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260 |
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261 | assert('Class#inherited') do
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262 | class Foo
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263 | @@subclass_name = nil
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264 | def self.inherited(subclass)
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265 | @@subclass_name = subclass
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266 | end
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267 | def self.subclass_name
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268 | @@subclass_name
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269 | end
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270 | end
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271 |
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272 | assert_equal(nil, Foo.subclass_name)
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273 |
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274 | class Bar < Foo
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275 | end
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276 |
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277 | assert_equal(Bar, Foo.subclass_name)
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278 |
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279 | class Baz < Bar
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280 | end
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281 |
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282 | assert_equal(Baz, Foo.subclass_name)
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283 | end
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284 |
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285 | assert('singleton tests') do
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286 | module FooMod
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287 | def run_foo_mod
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288 | 100
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289 | end
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290 | end
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291 |
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292 | bar = String.new
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293 |
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294 | baz = class << bar
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295 | extend FooMod
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296 | def self.run_baz
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297 | 200
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298 | end
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299 | end
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300 |
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301 | assert_equal :run_baz, baz
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302 |
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303 | assert_raise(NoMethodError, 'should raise NoMethodError') do
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304 | bar.run_foo_mod
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305 | end
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306 | assert_raise(NoMethodError, 'should raise NoMethodError') do
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307 | bar.run_baz
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308 | end
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309 |
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310 | baz = class << bar
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311 | extend FooMod
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312 | def self.run_baz
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313 | 300
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314 | end
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315 | self
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316 | end
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317 |
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318 | assert_true baz.respond_to? :run_baz
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319 | assert_true baz.respond_to? :run_foo_mod
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320 | assert_equal 100, baz.run_foo_mod
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321 | assert_equal 300, baz.run_baz
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322 |
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323 | assert_raise(NoMethodError, 'should raise NoMethodError') do
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324 | bar.run_foo_mod
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325 | end
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326 | assert_raise(NoMethodError, 'should raise NoMethodError') do
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327 | bar.run_baz
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328 | end
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329 |
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330 | fv = false
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331 | class << fv
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332 | def self.run_false
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333 | 5
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334 | end
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335 | end
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336 |
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337 | nv = nil
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338 | class << nv
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339 | def self.run_nil
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340 | 6
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341 | end
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342 | end
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343 |
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344 | tv = true
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345 | class << tv
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346 | def self.run_nil
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347 | 7
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348 | end
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349 | end
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350 |
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351 | assert_raise(TypeError, 'should raise TypeError') do
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352 | num = 1.0
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353 | class << num
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354 | def self.run_nil
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355 | 7
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356 | end
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357 | end
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358 | end if Object.const_defined?(:Float)
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359 |
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360 | o = Object.new
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361 | sc = class << o; self end
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362 | o.freeze
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363 | assert_predicate(sc, :frozen?)
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364 |
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365 | assert_predicate(class << Object.new.freeze; self end, :frozen?)
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366 | end
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367 |
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368 | assert('clone Class') do
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369 | class Foo
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370 | def func
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371 | true
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372 | end
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373 | end
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374 |
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375 | assert_true(Foo.clone.new.func)
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376 | end
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377 |
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378 | assert('class variable and class << self style class method') do
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379 | class ClassVariableTest
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380 | @@class_variable = "value"
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381 | class << self
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382 | def class_variable
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383 | @@class_variable
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384 | end
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385 | end
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386 | end
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387 |
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388 | assert_equal("value", ClassVariableTest.class_variable)
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389 | end
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390 |
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391 | assert('class variable definition in singleton_class') do
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392 | class ClassVariableDefinitionInSingletonTest
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393 | class << self
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394 | @@class_variable = "value"
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395 | end
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396 | def class_variable
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397 | @@class_variable
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398 | end
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399 | end
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400 |
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401 | assert_equal("value", ClassVariableDefinitionInSingletonTest.new.class_variable)
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402 | end
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403 |
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404 | assert('class variable in module and class << self style class method') do
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405 | module ClassVariableInModuleTest
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406 | @@class_variable = "value"
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407 | class << self
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408 | def class_variable
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409 | @@class_variable
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410 | end
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411 | end
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412 | end
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413 |
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414 | assert_equal("value", ClassVariableInModuleTest.class_variable)
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415 | end
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416 |
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417 | assert('child class/module defined in singleton class get parent constant') do
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418 | actual = module GetParentConstantTest
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419 | EXPECT = "value"
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420 | class << self
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421 | class CHILD
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422 | class << self
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423 | EXPECT
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424 | end
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425 | end
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426 | end
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427 | end
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428 | assert_equal("value", actual)
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429 | end
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430 |
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431 | assert('overriding class variable with a module (#3235)') do
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432 | module ModuleWithCVar
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433 | @@class_variable = 1
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434 | end
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435 | class CVarOverrideTest
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436 | @@class_variable = 2
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437 | include ModuleWithCVar
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438 |
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439 | assert_equal(1, @@class_variable)
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440 | end
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441 | end
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442 |
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443 | assert('class variable for frozen class/module') do
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444 | module CVarForFrozenModule
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445 | freeze
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446 | assert_raise(FrozenError) { @@cv = 1 }
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447 | end
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448 |
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449 | class CVarForFrozenClassA
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450 | @@a = nil
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451 | freeze
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452 | end
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453 | class CVarForFrozenClassB < CVarForFrozenClassA
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454 | def a=(v)
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455 | @@a = v
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456 | end
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457 | end
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458 | b = CVarForFrozenClassB.new
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459 | assert_raise(FrozenError) { b.a = 1 }
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460 | end
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461 |
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462 | assert('class with non-class/module outer raises TypeError') do
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463 | assert_raise(TypeError) { class 0::C1; end }
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464 | assert_raise(TypeError) { class []::C2; end }
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465 | end
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