1 | assert('Kernel.eval', '15.3.1.2.3') do
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2 | assert_equal(10) { Kernel.eval '1 * 10' }
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3 | assert_equal('aaa') { Kernel.eval "'a' * 3" }
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4 | assert_equal(10) {
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5 | a = 10
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6 | Kernel.eval "a"
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7 | }
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8 | assert_equal(20) {
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9 | a = 10
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10 | Kernel.eval "a = 20"
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11 | a
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12 | }
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13 | assert_equal(15) {
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14 | c = 5
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15 | lambda {
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16 | a = 10
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17 | Kernel.eval "c = a + c"
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18 | }.call
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19 | c
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20 | }
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21 | assert_equal(5) {
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22 | c = 5
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23 | lambda {
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24 | Kernel.eval 'lambda { c }.call'
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25 | }.call
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26 | }
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27 | assert_equal(15) {
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28 | c = 5
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29 | lambda {
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30 | a = 10
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31 | Kernel.eval 'lambda { c = a + c }.call'
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32 | }.call
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33 | c
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34 | }
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35 | assert_equal(2) {
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36 | a = 10
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37 | Kernel.eval 'def f(a); b=a.send(:+, 1); end'
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38 | f(1)
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39 | }
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40 | end
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41 |
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42 | assert('Kernel#eval', '15.3.1.3.12') do
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43 | assert_equal(10) { eval '1 * 10' }
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44 | end
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45 |
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46 | assert('rest arguments of eval') do
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47 | assert_raise(ArgumentError) { Kernel.eval('0', 0, 'test', 0) }
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48 | assert_equal ['test', 'test.rb', 10] do
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49 | Kernel.eval('[\'test\', __FILE__, __LINE__]', nil, 'test.rb', 10)
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50 | end
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51 | end
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52 |
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53 | assert 'eval syntax error' do
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54 | assert_raise(SyntaxError) do
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55 | eval 'p "test'
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56 | end
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57 | end
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58 |
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59 | assert('String instance_eval') do
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60 | obj = Object.new
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61 | obj.instance_variable_set :@test, 'test'
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62 | assert_raise(ArgumentError) { obj.instance_eval(0) { } }
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63 | assert_raise(ArgumentError) { obj.instance_eval('0', 'test', 0, 'test') }
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64 | assert_equal(['test.rb', 10]) { obj.instance_eval('[__FILE__, __LINE__]', 'test.rb', 10)}
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65 | assert_equal('test') { obj.instance_eval('@test') }
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66 | assert_equal('test') { obj.instance_eval { @test } }
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67 | o = Object.new
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68 | assert_equal ['', o, o], o.instance_eval("[''].each { |s| break [s, o, self] }")
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69 | end
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70 |
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71 | assert('Kernel.#eval(string) context') do
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72 | class TestEvalConstScope
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73 | EVAL_CONST_CLASS = 'class'
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74 | def const_string
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75 | eval 'EVAL_CONST_CLASS'
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76 | end
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77 | end
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78 | obj = TestEvalConstScope.new
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79 | assert_raise(NameError) { eval 'EVAL_CONST_CLASS' }
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80 | assert_equal('class') { obj.const_string }
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81 | end
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82 |
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83 | assert('Object#instance_eval with begin-rescue-ensure execution order') do
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84 | class HellRaiser
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85 | def raise_hell
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86 | order = [:enter_raise_hell]
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87 | begin
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88 | order.push :begin
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89 | self.instance_eval("raise 'error'")
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90 | rescue
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91 | order.push :rescue
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92 | ensure
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93 | order.push :ensure
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94 | end
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95 | order
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96 | end
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97 | end
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98 |
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99 | hell_raiser = HellRaiser.new
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100 | assert_equal([:enter_raise_hell, :begin, :rescue, :ensure], hell_raiser.raise_hell)
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101 | end
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