[270] | 1 | @obj = Object.new
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| 2 | class << @obj
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| 3 | include Enumerable
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| 4 | def foo *a
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| 5 | a.each { |x| yield x }
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| 6 | end
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| 7 | end
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| 8 |
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| 9 | assert 'Enumerator' do
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| 10 | assert_equal Class, Enumerator.class
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| 11 | end
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| 12 |
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| 13 | assert 'Enumerator' do
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| 14 | assert_equal Object, Enumerator.superclass
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| 15 | end
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| 16 |
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| 17 | assert 'Enumerator.new' do
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| 18 | assert_equal [0,1,2], 3.times.map{|i| i}.sort
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| 19 | assert_equal [:x,:y,:z], [:x,:y,:z].each.map{|i| i}.sort
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| 20 | assert_equal [[:x,1],[:y,2]], {x:1, y:2}.each.map{|i| i}.sort
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| 21 | assert_equal [1,2,3], @obj.to_enum(:foo, 1,2,3).to_a
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| 22 | assert_equal [1,2,3], Enumerator.new(@obj, :foo, 1,2,3).to_a
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| 23 | assert_equal [1,2,3], Enumerator.new { |y| i = 0; loop { y << (i += 1) } }.take(3)
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| 24 | assert_raise(ArgumentError) { Enumerator.new }
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| 25 | enum = @obj.to_enum
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| 26 | assert_raise(NoMethodError) { enum.each {} }
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| 27 |
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| 28 | # examples
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| 29 | fib = Enumerator.new do |y|
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| 30 | a = b = 1
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| 31 | loop do
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| 32 | y << a
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| 33 | a, b = b, a + b
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| 34 | end
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| 35 | end
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| 36 | assert_equal fib.take(10), [1,1,2,3,5,8,13,21,34,55]
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| 37 | end
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| 38 |
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| 39 | assert 'Enumerator#initialize_copy' do
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| 40 | assert_equal [1, 2, 3], @obj.to_enum(:foo, 1, 2, 3).dup.to_a
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| 41 | e = @obj.to_enum :foo, 1, 2, 3
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| 42 | assert_nothing_raised { assert_equal(1, e.next) }
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| 43 | assert_raise(TypeError) { e.dup }
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| 44 |
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| 45 | e = Enumerator.new { |y| i = 0; loop { y << (i += 1) } }.dup
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| 46 | assert_nothing_raised { assert_equal(1, e.next) }
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| 47 | assert_raise(TypeError) { e.dup }
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| 48 | end
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| 49 |
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| 50 | assert 'Enumerator#with_index' do
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| 51 | assert_equal([[1,0],[2,1],[3,2]], @obj.to_enum(:foo, 1, 2, 3).with_index.to_a)
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| 52 | assert_equal([[1,5],[2,6],[3,7]], @obj.to_enum(:foo, 1, 2, 3).with_index(5).to_a)
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[331] | 53 | a = []
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| 54 | @obj.to_enum(:foo, 1, 2, 3).with_index(10).with_index(20) { |*i| a << i }
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| 55 | assert_equal [[[1, 10], 20], [[2, 11], 21], [[3, 12], 22]], a
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[270] | 56 | end
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| 57 |
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| 58 | assert 'Enumerator#with_index nonnum offset' do
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| 59 | s = Object.new
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| 60 | def s.to_int; 1 end
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| 61 | assert_equal([[1,1],[2,2],[3,3]], @obj.to_enum(:foo, 1, 2, 3).with_index(s).to_a)
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| 62 | end
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| 63 |
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| 64 | assert 'Enumerator#with_index string offset' do
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| 65 | assert_raise(TypeError){ @obj.to_enum(:foo, 1, 2, 3).with_index('1').to_a }
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| 66 | end
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| 67 |
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[331] | 68 | assert 'Enumerator#each_with_index' do
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| 69 | assert_equal([[1,0],[2,1],[3,2]], @obj.to_enum(:foo, 1, 2, 3).each_with_index.to_a)
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| 70 | a = []
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| 71 | @obj.to_enum(:foo, 1, 2, 3).each_with_index {|*i| a << i}
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| 72 | assert_equal([[1, 0], [2, 1], [3, 2]], a)
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| 73 | end
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| 74 |
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[270] | 75 | assert 'Enumerator#with_object' do
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| 76 | obj = [0, 1]
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| 77 | ret = (1..10).each.with_object(obj) {|i, memo|
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| 78 | memo[0] += i
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| 79 | memo[1] *= i
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| 80 | }
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| 81 | assert_true(obj.equal?(ret))
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| 82 | assert_equal([55, 3628800], ret)
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| 83 | end
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| 84 |
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| 85 | assert 'Enumerator#with_object arguments' do
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| 86 | to_three = Enumerator.new do |y|
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| 87 | 3.times do |x|
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| 88 | y << x
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| 89 | end
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| 90 | end
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| 91 |
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| 92 | a = []
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| 93 | to_three_with_string = to_three.with_object("foo")
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| 94 | to_three_with_string.each do |x,string|
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| 95 | a << "#{string}:#{x}"
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| 96 | end
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| 97 | assert_equal ["foo:0","foo:1","foo:2"], a
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| 98 | end
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| 99 |
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| 100 | assert 'Enumerator#inspect' do
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| 101 | e = (0..10).each
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| 102 | assert_equal("#<Enumerator: 0..10:each>", e.inspect)
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| 103 | e = Enumerator.new("FooObject", :foo, 1)
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| 104 | assert_equal("#<Enumerator: FooObject:foo(1)>", e.inspect)
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| 105 | e = Enumerator.new("FooObject", :foo, 1, 2, 3)
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| 106 | assert_equal("#<Enumerator: FooObject:foo(1, 2, 3)>", e.inspect)
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| 107 | end
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| 108 |
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| 109 | assert 'Enumerator#each' do
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| 110 | o = Object.new
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| 111 | def o.each(ary)
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| 112 | ary << 1
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| 113 | yield
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| 114 | end
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| 115 | ary = []
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| 116 | e = o.to_enum.each(ary)
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| 117 | e.next
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| 118 | assert_equal([1], ary)
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| 119 | end
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| 120 |
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| 121 | assert 'Enumerator#each arguments' do
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| 122 | obj = Object.new
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| 123 |
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| 124 | def obj.each_arg(a, b=:b, *rest)
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| 125 | yield a
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| 126 | yield b
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| 127 | yield rest
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| 128 | :method_returned
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| 129 | end
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| 130 |
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| 131 | enum = obj.to_enum :each_arg, :a, :x
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| 132 |
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| 133 | assert_equal [:a, :x, []], enum.each.to_a
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| 134 | assert_true enum.each.equal?(enum)
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| 135 | assert_equal :method_returned, enum.each { |elm| elm }
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| 136 |
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| 137 | assert_equal [:a, :x, [:y, :z]], enum.each(:y, :z).to_a
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| 138 | assert_false enum.each(:y, :z).equal?(enum)
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| 139 | assert_equal :method_returned, enum.each(:y, :z) { |elm| elm }
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| 140 | end
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| 141 |
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| 142 | assert 'Enumerator#next' do
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| 143 | e = 3.times
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| 144 | 3.times { |i|
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| 145 | assert_equal i, e.next
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| 146 | }
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| 147 | assert_raise(StopIteration) { e.next }
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| 148 | end
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| 149 |
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| 150 | assert 'Enumerator#next_values' do
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| 151 | o = Object.new
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| 152 | def o.each
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| 153 | yield
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| 154 | yield 1
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| 155 | yield 1, 2
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| 156 | end
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| 157 | e = o.to_enum
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| 158 | assert_equal nil, e.next
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| 159 | assert_equal 1, e.next
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| 160 | assert_equal [1,2], e.next
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| 161 | e = o.to_enum
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| 162 | assert_equal [], e.next_values
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| 163 | assert_equal [1], e.next_values
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| 164 | assert_equal [1,2], e.next_values
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| 165 | end
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| 166 |
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| 167 | assert 'Enumerator#peek' do
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| 168 | a = [1]
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| 169 | e = a.each
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| 170 | assert_equal 1, e.peek
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| 171 | assert_equal 1, e.peek
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| 172 | assert_equal 1, e.next
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| 173 | assert_raise(StopIteration) { e.peek }
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| 174 | assert_raise(StopIteration) { e.peek }
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| 175 | end
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| 176 |
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| 177 | assert 'Enumerator#peek modify' do
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| 178 | o = Object.new
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| 179 | def o.each
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| 180 | yield 1,2
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| 181 | end
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| 182 | e = o.to_enum
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| 183 | a = e.peek
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| 184 | a << 3
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| 185 | assert_equal([1,2], e.peek)
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| 186 | end
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| 187 |
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| 188 | assert 'Enumerator#peek_values' do
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| 189 | o = Object.new
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| 190 | def o.each
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| 191 | yield
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| 192 | yield 1
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| 193 | yield 1, 2
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| 194 | end
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| 195 | e = o.to_enum
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| 196 | assert_equal nil, e.peek
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| 197 | assert_equal nil, e.next
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| 198 | assert_equal 1, e.peek
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| 199 | assert_equal 1, e.next
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| 200 | assert_equal [1,2], e.peek
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| 201 | assert_equal [1,2], e.next
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| 202 | e = o.to_enum
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| 203 | assert_equal [], e.peek_values
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| 204 | assert_equal [], e.next_values
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| 205 | assert_equal [1], e.peek_values
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| 206 | assert_equal [1], e.next_values
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| 207 | assert_equal [1,2], e.peek_values
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| 208 | assert_equal [1,2], e.next_values
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| 209 | e = o.to_enum
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| 210 | assert_equal [], e.peek_values
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| 211 | assert_equal nil, e.next
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| 212 | assert_equal [1], e.peek_values
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| 213 | assert_equal 1, e.next
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| 214 | assert_equal [1,2], e.peek_values
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| 215 | assert_equal [1,2], e.next
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| 216 | e = o.to_enum
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| 217 | assert_equal nil, e.peek
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| 218 | assert_equal [], e.next_values
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| 219 | assert_equal 1, e.peek
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| 220 | assert_equal [1], e.next_values
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| 221 | assert_equal [1,2], e.peek
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| 222 | assert_equal [1,2], e.next_values
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| 223 | end
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| 224 |
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| 225 | assert 'Enumerator#peek_values modify' do
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| 226 | o = Object.new
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| 227 | def o.each
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| 228 | yield 1,2
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| 229 | end
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| 230 | e = o.to_enum
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| 231 | a = e.peek_values
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| 232 | a << 3
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| 233 | assert_equal [1,2], e.peek
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| 234 | end
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| 235 |
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| 236 | assert 'Enumerator#feed' do
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| 237 | o = Object.new
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| 238 | def o.each(ary)
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| 239 | ary << yield
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| 240 | ary << yield
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| 241 | ary << yield
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| 242 | end
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| 243 | ary = []
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| 244 | e = o.to_enum :each, ary
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| 245 | e.next
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| 246 | e.feed 1
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| 247 | e.next
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| 248 | e.feed 2
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| 249 | e.next
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| 250 | e.feed 3
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| 251 | assert_raise(StopIteration) { e.next }
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| 252 | assert_equal [1,2,3], ary
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| 253 | end
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| 254 |
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| 255 | assert 'Enumerator#feed mixed' do
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| 256 | o = Object.new
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| 257 | def o.each(ary)
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| 258 | ary << yield
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| 259 | ary << yield
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| 260 | ary << yield
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| 261 | end
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| 262 | ary = []
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| 263 | e = o.to_enum :each, ary
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| 264 | e.next
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| 265 | e.feed 1
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| 266 | e.next
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| 267 | e.next
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| 268 | e.feed 3
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| 269 | assert_raise(StopIteration) { e.next }
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| 270 | assert_equal [1,nil,3], ary
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| 271 | end
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| 272 |
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| 273 | assert 'Enumerator#feed twice' do
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| 274 | o = Object.new
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| 275 | def o.each(ary)
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| 276 | ary << yield
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| 277 | ary << yield
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| 278 | ary << yield
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| 279 | end
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| 280 | ary = []
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| 281 | e = o.to_enum :each, ary
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| 282 | e.feed 1
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| 283 | assert_raise(TypeError) { e.feed 2 }
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| 284 | end
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| 285 |
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| 286 | assert 'Enumerator#feed before first next' do
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| 287 | o = Object.new
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| 288 | def o.each(ary)
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| 289 | ary << yield
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| 290 | ary << yield
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| 291 | ary << yield
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| 292 | end
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| 293 | ary = []
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| 294 | e = o.to_enum :each, ary
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| 295 | e.feed 1
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| 296 | e.next
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| 297 | e.next
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| 298 | assert_equal [1], ary
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| 299 | end
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| 300 |
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| 301 | assert 'Enumerator#feed yielder' do
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| 302 | x = nil
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| 303 | e = Enumerator.new {|y| x = y.yield; 10 }
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| 304 | e.next
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| 305 | e.feed 100
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| 306 | assert_raise(StopIteration) { e.next }
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| 307 | assert_equal 100, x
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| 308 | end
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| 309 |
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| 310 | assert 'Enumerator#rewind' do
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| 311 | e = @obj.to_enum(:foo, 1, 2, 3)
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| 312 | assert_equal 1, e.next
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| 313 | assert_equal 2, e.next
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| 314 | e.rewind
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| 315 | assert_equal 1, e.next
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| 316 | assert_equal 2, e.next
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| 317 | assert_equal 3, e.next
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| 318 | assert_raise(StopIteration) { e.next }
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| 319 | end
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| 320 |
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| 321 | assert 'Enumerator#rewind clear feed' do
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| 322 | o = Object.new
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| 323 | def o.each(ary)
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| 324 | ary << yield
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| 325 | ary << yield
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| 326 | ary << yield
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| 327 | end
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| 328 | ary = []
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| 329 | e = o.to_enum(:each, ary)
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| 330 | e.next
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| 331 | e.feed 1
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| 332 | e.next
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| 333 | e.feed 2
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| 334 | e.rewind
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| 335 | e.next
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| 336 | e.next
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| 337 | assert_equal([1,nil], ary)
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| 338 | end
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| 339 |
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| 340 | assert 'Enumerator#rewind clear' do
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| 341 | o = Object.new
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| 342 | def o.each(ary)
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| 343 | ary << yield
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| 344 | ary << yield
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| 345 | ary << yield
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| 346 | end
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| 347 | ary = []
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| 348 | e = o.to_enum :each, ary
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| 349 | e.next
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| 350 | e.feed 1
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| 351 | e.next
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| 352 | e.feed 2
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| 353 | e.rewind
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| 354 | e.next
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| 355 | e.next
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| 356 | assert_equal [1,nil], ary
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| 357 | end
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| 358 |
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| 359 | assert 'Enumerator::Generator' do
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| 360 | # note: Enumerator::Generator is a class just for internal
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| 361 | g = Enumerator::Generator.new {|y| y << 1 << 2 << 3; :foo }
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| 362 | g2 = g.dup
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| 363 | a = []
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| 364 | assert_equal(:foo, g.each {|x| a << x })
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| 365 | assert_equal([1, 2, 3], a)
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| 366 | a = []
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| 367 | assert_equal(:foo, g2.each {|x| a << x })
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| 368 | assert_equal([1, 2, 3], a)
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| 369 | end
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| 370 |
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| 371 | assert 'Enumerator::Generator args' do
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| 372 | g = Enumerator::Generator.new {|y, x| y << 1 << 2 << 3; x }
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| 373 | a = []
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| 374 | assert_equal(:bar, g.each(:bar) {|x| a << x })
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| 375 | assert_equal([1, 2, 3], a)
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| 376 | end
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| 377 |
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| 378 | assert 'Enumerator::Yielder' do
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| 379 | # note: Enumerator::Yielder is a class just for internal
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| 380 | a = []
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| 381 | y = Enumerator::Yielder.new {|x| a << x }
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| 382 | assert_equal(y, y << 1 << 2 << 3)
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| 383 | assert_equal([1, 2, 3], a)
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| 384 |
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| 385 | a = []
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| 386 | y = Enumerator::Yielder.new {|x| a << x }
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| 387 | assert_equal([1], y.yield(1))
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| 388 | assert_equal([1, 2], y.yield(2))
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| 389 | assert_equal([1, 2, 3], y.yield(3))
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| 390 |
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| 391 | assert_raise(LocalJumpError) { Enumerator::Yielder.new }
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| 392 | end
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| 393 |
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| 394 | assert 'next after StopIteration' do
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| 395 | a = [1]
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| 396 | e = a.each
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| 397 | assert_equal(1, e.next)
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| 398 | assert_raise(StopIteration) { e.next }
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| 399 | assert_raise(StopIteration) { e.next }
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| 400 | e.rewind
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| 401 | assert_equal(1, e.next)
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| 402 | assert_raise(StopIteration) { e.next }
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| 403 | assert_raise(StopIteration) { e.next }
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| 404 | end
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| 405 |
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| 406 | assert 'gc' do
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| 407 | assert_nothing_raised do
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| 408 | 1.times do
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| 409 | foo = [1,2,3].to_enum
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| 410 | GC.start
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| 411 | end
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| 412 | GC.start
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| 413 | end
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| 414 | end
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| 415 |
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| 416 | assert 'nested iteration' do
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| 417 | def (o = Object.new).each
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| 418 | yield :ok1
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| 419 | yield [:ok2, :x].each.next
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| 420 | end
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| 421 | e = o.to_enum
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| 422 | assert_equal :ok1, e.next
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| 423 | assert_equal :ok2, e.next
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| 424 | assert_raise(StopIteration) { e.next }
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| 425 | end
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| 426 |
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| 427 | assert 'Kernel#to_enum' do
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| 428 | assert_equal Enumerator, [].to_enum.class
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| 429 | assert_raise(ArgumentError){ nil.to_enum }
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| 430 | end
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| 431 |
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| 432 | assert 'modifying existing methods' do
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| 433 | assert_equal Enumerator, loop.class
|
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| 434 | e = 3.times
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| 435 | i = 0
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| 436 | loop_ret = loop {
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| 437 | assert_equal i, e.next
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| 438 | i += 1
|
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| 439 | }
|
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| 440 | end
|
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| 441 |
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| 442 | assert 'Integral#times' do
|
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| 443 | a = 3
|
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| 444 | b = a.times
|
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| 445 | c = []
|
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| 446 | b.with_object(c) do |i, obj|
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| 447 | obj << i
|
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| 448 | end
|
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| 449 | assert_equal 3, a
|
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| 450 | assert_equal Enumerator, b.class
|
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| 451 | assert_equal [0,1,2], c
|
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| 452 | end
|
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| 453 |
|
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| 454 | assert 'Enumerable#each_with_index' do
|
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| 455 | assert_equal [['a',0],['b',1],['c',2]], ['a','b','c'].each_with_index.to_a
|
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| 456 | end
|
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| 457 |
|
---|
| 458 | assert 'Enumerable#map' do
|
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| 459 | a = [1,2,3]
|
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| 460 | b = a.map
|
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| 461 | c = b.with_index do |i, index|
|
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| 462 | [i*i, index*index]
|
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| 463 | end
|
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| 464 | assert_equal [1,2,3], a
|
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| 465 | assert_equal [[1,0],[4,1],[9,4]], c
|
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| 466 | end
|
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| 467 |
|
---|
| 468 | assert 'Enumerable#find_all' do
|
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| 469 | assert_equal [[3,4]], [[1,2],[3,4],[5,6]].find_all.each{ |i| i[1] == 4 }
|
---|
| 470 | end
|
---|
| 471 |
|
---|
| 472 | assert 'Array#each_index' do
|
---|
| 473 | a = [1,2,3]
|
---|
| 474 | b = a.each_index
|
---|
| 475 | c = []
|
---|
| 476 | b.with_index do |index1,index2|
|
---|
| 477 | c << [index1+2,index2+5]
|
---|
| 478 | end
|
---|
| 479 | assert_equal [1,2,3], a
|
---|
| 480 | assert_equal [[2,5],[3,6],[4,7]], c
|
---|
| 481 | end
|
---|
| 482 |
|
---|
| 483 | assert 'Array#map!' do
|
---|
| 484 | a = [1,2,3]
|
---|
| 485 | b = a.map!
|
---|
| 486 | b.with_index do |i, index|
|
---|
| 487 | [i*i, index*index]
|
---|
| 488 | end
|
---|
| 489 | assert_equal [[1,0],[4,1],[9,4]], a
|
---|
| 490 | end
|
---|
| 491 |
|
---|
| 492 | assert 'Hash#each' do
|
---|
| 493 | a = {a:1,b:2}
|
---|
| 494 | b = a.each
|
---|
| 495 | c = []
|
---|
| 496 | b.each do |k,v|
|
---|
| 497 | c << [k,v]
|
---|
| 498 | end
|
---|
| 499 | assert_equal [[:a,1], [:b,2]], c.sort
|
---|
| 500 | end
|
---|
| 501 |
|
---|
| 502 | assert 'Hash#each_key' do
|
---|
| 503 | assert_equal [:a,:b], {a:1,b:2}.each_key.to_a.sort
|
---|
| 504 | end
|
---|
| 505 |
|
---|
| 506 | assert 'Hash#each_value' do
|
---|
| 507 | assert_equal [1,2], {a:1,b:2}.each_value.to_a.sort
|
---|
| 508 | end
|
---|
| 509 |
|
---|
| 510 | assert 'Hash#select' do
|
---|
| 511 | h = {1=>2,3=>4,5=>6}
|
---|
| 512 | hret = h.select.with_index {|a,b| a[1] == 4}
|
---|
| 513 | assert_equal({3=>4}, hret)
|
---|
| 514 | assert_equal({1=>2,3=>4,5=>6}, h)
|
---|
| 515 | end
|
---|
| 516 |
|
---|
| 517 | assert 'Hash#select!' do
|
---|
| 518 | h = {1=>2,3=>4,5=>6}
|
---|
| 519 | hret = h.select!.with_index {|a,b| a[1] == 4}
|
---|
| 520 | assert_equal h, hret
|
---|
| 521 | assert_equal({3=>4}, h)
|
---|
| 522 | end
|
---|
| 523 |
|
---|
| 524 | assert 'Hash#reject' do
|
---|
| 525 | h = {1=>2,3=>4,5=>6}
|
---|
| 526 | hret = h.reject.with_index {|a,b| a[1] == 4}
|
---|
| 527 | assert_equal({1=>2,5=>6}, hret)
|
---|
| 528 | assert_equal({1=>2,3=>4,5=>6}, h)
|
---|
| 529 | end
|
---|
| 530 |
|
---|
| 531 | assert 'Hash#reject!' do
|
---|
| 532 | h = {1=>2,3=>4,5=>6}
|
---|
| 533 | hret = h.reject!.with_index {|a,b| a[1] == 4}
|
---|
| 534 | assert_equal h, hret
|
---|
| 535 | assert_equal({1=>2,5=>6}, h)
|
---|
| 536 | end
|
---|
| 537 |
|
---|
| 538 | assert 'Range#each' do
|
---|
| 539 | a = (1..5)
|
---|
| 540 | b = a.each
|
---|
| 541 | c = []
|
---|
| 542 | b.each do |i|
|
---|
| 543 | c << i
|
---|
| 544 | end
|
---|
| 545 | assert_equal [1,2,3,4,5], c
|
---|
| 546 | end
|
---|