1 | class Base
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2 | def foo() :base end
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3 | end
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4 |
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5 | class Derived < Base
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6 | def foo() :derived end
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7 | end
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8 |
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9 | class Interpreter
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10 | attr_accessor :ret
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11 |
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12 | def do_a() @ret += "there, "; end
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13 | def do_d() @ret += "Hello "; end
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14 | def do_e() @ret += "!\n"; end
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15 | def do_v() @ret += "Dave"; end
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16 | Dispatcher = {
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17 | "a" => instance_method(:do_a),
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18 | "d" => instance_method(:do_d),
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19 | "e" => instance_method(:do_e),
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20 | "v" => instance_method(:do_v)
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21 | }
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22 | def interpret(string)
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23 | @ret = ""
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24 | string.split("").each {|b| Dispatcher[b].bind(self).call }
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25 | end
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26 | end
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27 |
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28 | assert 'demo' do
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29 | interpreter = Interpreter.new
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30 | interpreter.interpret('dave')
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31 | assert_equal "Hello there, Dave!\n", interpreter.ret
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32 | end
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33 |
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34 | assert 'Method#arity' do
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35 | Class.new {
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36 | attr_accessor :done
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37 | def initialize; @done = false; end
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38 | def m0() end
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39 | def m1(a) end
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40 | def m2(a, b) end
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41 | def mo1(a = nil, &b) end
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42 | def mo2(a, b = nil) end
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43 | def mo3(*a) end
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44 | def mo4(a, *b, &c) end
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45 | def mo5(a, *b, c) end
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46 | def mo6(a, *b, c, &d) end
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47 | def mo7(a, b = nil, *c, d, &e) end
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48 | def ma1((a), &b) nil && a end
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49 |
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50 | def run
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51 | assert_equal(0, method(:m0).arity)
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52 | assert_equal(1, method(:m1).arity)
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53 | assert_equal(2, method(:m2).arity)
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54 | assert_equal(-1, method(:mo1).arity)
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55 | assert_equal(-2, method(:mo2).arity)
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56 | assert_equal(-1, method(:mo3).arity)
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57 | assert_equal(-2, method(:mo4).arity)
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58 | assert_equal(-3, method(:mo5).arity)
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59 | assert_equal(-3, method(:mo6).arity)
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60 | assert_equal(-3, method(:mo7).arity)
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61 | assert_equal(1, method(:ma1).arity)
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62 |
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63 | assert_equal(-1, method(:__send__).arity)
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64 | assert_equal(-1, method(:nothing).arity)
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65 | end
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66 |
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67 | def respond_to_missing?(m, b)
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68 | m == :nothing
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69 | end
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70 | }.new.run
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71 | end
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72 |
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73 | assert 'Method and UnboundMethod should not be have a `new` method' do
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74 | assert_raise(NoMethodError){ Method.new }
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75 | assert_raise(NoMethodError){ UnboundMethod.new }
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76 | end
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77 |
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78 | assert 'instance' do
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79 | assert_kind_of Method, 1.method(:+)
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80 | assert_kind_of UnboundMethod, Fixnum.instance_method(:+)
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81 | end
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82 |
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83 | assert 'Method#call' do
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84 | assert_equal 3, 1.method(:+).call(2)
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85 | assert_equal "ab", "a".method(:+)["b"]
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86 | klass = Class.new {
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87 | def foo; 42; end
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88 | }
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89 | klass2 = Class.new(klass) {
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90 | def foo; super; end
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91 | }
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92 | assert_equal 42, klass2.new.method(:foo).call
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93 |
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94 | i = Class.new {
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95 | def bar
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96 | yield 3
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97 | end
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98 | }.new
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99 | assert_raise(LocalJumpError) { i.method(:bar).call }
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100 | assert_equal 3, i.method(:bar).call { |i| i }
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101 | end
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102 |
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103 | assert 'Method#call for regression' do
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104 | obj = BasicObject.new
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105 | assert_equal String, Kernel.instance_method(:inspect).bind(obj).call().class, "https://github.com/ksss/mruby-method/issues/4"
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106 | end
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107 |
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108 | assert 'Method#call with undefined method' do
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109 | c = Class.new {
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110 | attr_accessor :m, :argv
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111 | def respond_to_missing?(m, b)
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112 | m == :foo
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113 | end
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114 |
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115 | def method_missing(m, *argv)
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116 | @m = m
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117 | @argv = argv
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118 | super
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119 | end
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120 | }
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121 | cc = c.new
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122 | assert_raise(NameError) { cc.method(:nothing) }
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123 | assert_kind_of Method, cc.method(:foo)
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124 | assert_raise(NoMethodError) { cc.method(:foo).call(:arg1, :arg2) }
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125 | assert_equal :foo, cc.m
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126 | assert_equal [:arg1, :arg2], cc.argv
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127 |
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128 | cc = c.new
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129 | m = cc.method(:foo)
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130 | c.class_eval do
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131 | def foo
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132 | :ng
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133 | end
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134 | end
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135 | assert_raise(NoMethodError) { m.call(:arg1, :arg2) }
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136 | end
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137 |
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138 | assert 'Method#source_location' do
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139 | skip if proc{}.source_location.nil?
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140 |
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141 | filename = __FILE__
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142 | klass = Class.new
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143 |
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144 | lineno = __LINE__ + 1
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145 | klass.define_method(:find_me_if_you_can) {}
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146 | assert_equal [filename, lineno], klass.new.method(:find_me_if_you_can).source_location
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147 |
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148 | lineno = __LINE__ + 1
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149 | class <<klass; define_method(:s_find_me_if_you_can) {}; end
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150 | assert_equal [filename, lineno], klass.method(:s_find_me_if_you_can).source_location
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151 |
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152 | klass = Class.new { def respond_to_missing?(m, b); m == :nothing; end }
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153 | assert_nil klass.new.method(:nothing).source_location
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154 | end
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155 |
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156 | assert 'UnboundMethod#source_location' do
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157 | skip if proc{}.source_location.nil?
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158 |
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159 | filename = __FILE__
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160 | klass = Class.new {
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161 | def respond_to_missing?(m, b)
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162 | m == :nothing
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163 | end
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164 | }
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165 |
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166 | lineno = __LINE__ + 1
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167 | klass.define_method(:find_me_if_you_can) {}
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168 | assert_equal [filename, lineno], klass.instance_method(:find_me_if_you_can).source_location
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169 | assert_nil klass.new.method(:nothing).unbind.source_location
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170 | end
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171 |
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172 | assert 'Method#parameters' do
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173 | klass = Class.new {
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174 | def foo(a, b=nil, *c) end
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175 | def respond_to_missing?(m, b)
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176 | m == :missing
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177 | end
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178 | }
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179 | assert_equal [[:req, :a], [:opt, :b], [:rest, :c]], klass.new.method(:foo).parameters
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180 | assert_equal [[:rest]], klass.new.method(:missing).parameters
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181 | end
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182 |
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183 | assert 'UnboundMethod#parameters' do
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184 | klass = Class.new {
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185 | def foo(a, b=nil, *c) end
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186 | def respond_to_missing?(m, b)
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187 | m == :nothing
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188 | end
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189 | }
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190 | assert_equal [[:req, :a], [:opt, :b], [:rest, :c]], klass.instance_method(:foo).parameters
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191 | assert_equal [[:rest]], klass.new.method(:nothing).unbind.parameters
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192 | end
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193 |
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194 | assert 'Method#to_proc' do
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195 | m = 3.method(:+)
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196 | assert_kind_of Proc, m.to_proc
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197 | assert_equal 7, m.call(4)
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198 |
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199 | o = Object.new
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200 | def o.foo(a, b=nil, *c)
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201 | [a, b, c]
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202 | end
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203 | assert_equal [:bar, nil, []], o.method(:foo).to_proc.call(:bar)
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204 | # We can fix this issue but leave until the problem
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205 | # assert_equal o.method(:foo).arity, o.method(:foo).to_proc.arity
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206 |
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207 | def o.bar
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208 | yield 39
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209 | end
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210 | assert_equal 42, o.bar(&3.method(:+))
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211 | end
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212 |
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213 | assert 'to_s' do
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214 | o = Object.new
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215 | def o.foo; end
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216 | m = o.method(:foo)
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217 | assert_equal("#<UnboundMethod: #{ class << o; self; end.inspect }#foo>", m.unbind.inspect)
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218 |
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219 | c = Class.new
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220 | c.class_eval { def foo; end; }
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221 | m = c.new.method(:foo)
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222 | assert_equal("#<Method: #{ c.inspect }#foo>", m.inspect)
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223 | m = c.instance_method(:foo)
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224 | assert_equal("#<UnboundMethod: #{ c.inspect }#foo>", m.inspect)
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225 | end
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226 |
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227 | assert 'owner' do
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228 | c = Class.new do
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229 | def foo; end
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230 | def self.bar; end
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231 | end
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232 | m = Module.new do
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233 | def baz; end
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234 | end
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235 | c.include(m)
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236 | c2 = Class.new(c)
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237 |
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238 | assert_equal(c, c.instance_method(:foo).owner)
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239 | assert_equal(c, c2.instance_method(:foo).owner)
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240 |
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241 | assert_equal(c, c.new.method(:foo).owner)
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242 | assert_equal(c, c2.new.method(:foo).owner)
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243 | assert_equal((class <<c; self; end), c2.method(:bar).owner)
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244 | end
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245 |
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246 | assert 'owner missing' do
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247 | c = Class.new do
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248 | def respond_to_missing?(name, bool)
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249 | name == :foo
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250 | end
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251 | end
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252 | c2 = Class.new(c)
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253 | assert_equal(c, c.new.method(:foo).owner)
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254 | assert_equal(c2, c2.new.method(:foo).owner)
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255 | end
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256 |
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257 | assert 'receiver name owner' do
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258 | o = Object.new
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259 | def o.foo; end
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260 | m = o.method(:foo)
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261 | assert_equal(o, m.receiver)
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262 | assert_equal(:foo, m.name)
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263 | assert_equal(class << o; self; end, m.owner)
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264 | assert_equal(:foo, m.unbind.name)
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265 | assert_equal(class << o; self; end, m.unbind.owner)
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266 | end
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267 |
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268 | assert 'Method#unbind' do
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269 | assert_equal(:derived, Derived.new.foo)
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270 | um = Derived.new.method(:foo).unbind
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271 | assert_kind_of(UnboundMethod, um)
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272 | Derived.class_eval do
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273 | def foo() :changed end
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274 | end
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275 | assert_equal(:changed, Derived.new.foo)
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276 | assert_equal(:changed, Derived.new.foo{})
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277 | assert_equal(:derived, um.bind(Derived.new).call)
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278 | assert_raise(TypeError) do
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279 | um.bind(Base.new)
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280 | end
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281 |
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282 | # TODO:
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283 | # Block passed method not handled correctly with workaround.
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284 | # See comment near `mrb_funcall_with_block` for detail.
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285 | # assert_equal(:derived, um.bind(Derived.new).call{})
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286 | end
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287 |
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288 | assert 'Kernel#method' do
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289 | c1 = Class.new {
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290 | def foo; :foo; end
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291 | }
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292 | o = c1.new
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293 | assert_kind_of Method, o.method(:foo)
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294 | assert_kind_of Method, o.method('foo')
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295 | assert_raise(TypeError) { o.method(nil) }
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296 | assert_raise(NameError) { o.method('bar') }
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297 | assert_raise(NameError) { o.method(:bar) }
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298 | end
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299 |
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300 | assert "Module#instance_method" do
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301 | assert_kind_of UnboundMethod, Object.instance_method(:object_id)
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302 | assert_raise(NameError) { Object.instance_method(:nothing) }
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303 | c = Class.new {
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304 | def respond_to_missing?(m, b)
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305 | false
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306 | end
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307 | }
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308 | assert_raise(NameError) { c.instance_method(:nothing) }
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309 | end
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310 |
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311 | assert 'Kernel#singleton_method' do
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312 | c1 = Class.new {
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313 | def foo; :foo; end
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314 | }
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315 | o = c1.new
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316 | def o.bar; :bar; end
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317 | assert_kind_of Method, o.method(:foo)
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318 | assert_raise(NameError) { o.singleton_method(:foo) }
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319 | assert_kind_of Method, o.singleton_method(:bar)
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320 | assert_raise(TypeError) { o.singleton_method(nil) }
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321 | m = assert_nothing_raised(NameError) { break o.singleton_method(:bar) }
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322 | assert_equal(:bar, m.call)
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323 | end
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324 |
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325 | assert 'Method#super_method' do
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326 | o = Derived.new
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327 | m = o.method(:foo).super_method
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328 | assert_equal(Base, m.owner)
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329 | assert_true(o.equal? m.receiver)
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330 | assert_equal(:foo, m.name)
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331 | assert_nil(m.super_method)
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332 |
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333 | c = Class.new {
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334 | def foo; end
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335 | }
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336 | o = c.new
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337 | o.extend Module.new {
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338 | def foo; end
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339 | }
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340 | assert_equal c, o.method(:foo).super_method.owner
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341 | assert_equal :foo, o.method(:foo).super_method.name
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342 | assert_equal o, o.method(:foo).super_method.receiver
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343 | end
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344 |
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345 | assert 'Method#==' do
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346 | o = Object.new
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347 | class << o
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348 | def foo; end
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349 | end
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350 | assert_not_equal(o.method(:foo), nil)
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351 | m = o.method(:foo)
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352 | def m.foo; end
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353 | # TODO: assert_not_equal(o.method(:foo), m)
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354 | assert_equal(o.method(:foo), o.method(:foo))
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355 | # TODO: assert_false(o.method(:foo).eql? m)
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356 | assert_true(o.method(:foo).eql? o.method(:foo))
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357 |
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358 | assert_false(0.method(:+) == 1.method(:+))
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359 | assert_false(0.method(:+) == 0.method(:-))
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360 | a = 0.method(:+)
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361 | assert_true(a.method(:==) == a.method(:eql?))
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362 | end
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363 |
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364 | assert "Method#initialize_copy" do
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365 | c = Class.new {
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366 | def foo
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367 | end
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368 | }.new
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369 | m1 = c.method(:foo)
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370 | m2 = m1.clone
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371 | assert_equal(m1, m2)
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372 | end
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373 |
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374 | assert "Method#<< and Method#>>" do
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375 | obj = Object.new
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376 | class << obj
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377 | def mul2(n); n * 2; end
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378 | def add3(n); n + 3; end
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379 | end
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380 |
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381 | f = obj.method(:mul2)
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382 | g = obj.method(:add3)
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383 |
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384 | m1 = f << g
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385 | assert_kind_of Proc, m1
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386 | assert_equal 16, m1.call(5)
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387 |
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388 | m2 = f >> g
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389 | assert_kind_of Proc, m2
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390 | assert_equal 13, m2.call(5)
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391 | end
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392 |
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393 | assert 'UnboundMethod#arity' do
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394 | c = Class.new {
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395 | def foo(a, b)
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396 | end
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397 |
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398 | def respond_to_missing?(m, b)
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399 | m == :nothing
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400 | end
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401 | }
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402 | assert_equal 2, c.instance_method(:foo).arity
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403 | assert_equal(-1, c.new.method(:nothing).unbind.arity)
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404 | end
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405 |
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406 | assert 'UnboundMethod#==' do
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407 | assert_false(Fixnum.instance_method(:+) == Fixnum.instance_method(:-))
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408 | assert_true(Fixnum.instance_method(:+) == Fixnum.instance_method(:+))
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409 | assert_false(Fixnum.instance_method(:+) == Float.instance_method(:+))
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410 | assert_true(UnboundMethod.instance_method(:==) == UnboundMethod.instance_method(:eql?))
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411 | end
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412 |
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413 | assert 'UnboundMethod#super_method' do
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414 | m = Derived.instance_method(:foo)
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415 | m = m.super_method
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416 | assert_equal(Base.instance_method(:foo), m)
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417 | assert_nil(m.super_method)
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418 |
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419 | m = Object.instance_method(:object_id)
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420 | assert_nil(m.super_method)
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421 | end
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422 |
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423 | assert 'UnboundMethod#bind' do
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424 | m = Module.new{ def meth() :meth end }.instance_method(:meth)
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425 | assert_raise(ArgumentError) { m.bind }
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426 | assert_kind_of Method, m.bind(1)
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427 | assert_kind_of Method, m.bind(:sym)
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428 | assert_kind_of Method, m.bind(Object.new)
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429 | assert_equal(:meth, m.bind(1).call)
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430 | assert_equal(:meth, m.bind(:sym).call)
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431 | assert_equal(:meth, m.bind(Object.new).call)
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432 | sc = nil
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433 | Class.new {
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434 | sc = class << self
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435 | def foo
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436 | end
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437 | self
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438 | end
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439 | }
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440 | assert_raise(TypeError) { sc.instance_method(:foo).bind([]) }
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441 | assert_raise(TypeError) { Array.instance_method(:each).bind(1) }
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442 | assert_kind_of Method, Object.instance_method(:object_id).bind(Object.new)
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443 | end
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444 |
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445 | assert 'UnboundMethod#bind_call' do
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446 | m = Array.instance_method(:size)
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447 | assert_equal(:size, m.name)
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448 | assert_equal(0, m.bind_call([]))
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449 | assert_equal(1, m.bind_call([1]))
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450 | assert_equal(2, m.bind_call([1,2]))
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451 | end
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