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annotate src/testdir/test_lambda.vim @ 9735:8037eb704e93 v7.4.2143

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commit https://github.com/vim/vim/commit/bc7ce675b2d1c9fb58c067eff3edd59abc30aba4 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Aug 1 22:49:22 2016 +0200 patch 7.4.2143 Problem: A funccal is garbage collected while it can still be used. Solution: Set copyID in all referenced functions. Do not list lambda functions with ":function".
author Christian Brabandt <cb@256bit.org>
date Mon, 01 Aug 2016 23:00:07 +0200
parents 8436bb5134f5
children ade79e3e3b88
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1 " Test for lambda and closure
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2
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3 function! Test_lambda_feature()
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4 call assert_equal(1, has('lambda'))
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5 endfunction
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6
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7 function! Test_lambda_with_filter()
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8 let s:x = 2
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9 call assert_equal([2, 3], filter([1, 2, 3], {i, v -> v >= s:x}))
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10 endfunction
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12 function! Test_lambda_with_map()
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13 let s:x = 1
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14 call assert_equal([2, 3, 4], map([1, 2, 3], {i, v -> v + s:x}))
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15 endfunction
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17 function! Test_lambda_with_sort()
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18 call assert_equal([1, 2, 3, 4, 7], sort([3,7,2,1,4], {a, b -> a - b}))
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19 endfunction
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21 function! Test_lambda_with_timer()
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22 if !has('timers')
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23 return
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24 endif
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26 let s:n = 0
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27 let s:timer_id = 0
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28 function! s:Foo()
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29 "let n = 0
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30 let s:timer_id = timer_start(50, {-> execute("let s:n += 1 | echo s:n", "")}, {"repeat": -1})
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31 endfunction
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33 call s:Foo()
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34 sleep 200ms
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35 " do not collect lambda
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36 call test_garbagecollect_now()
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37 let m = s:n
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38 sleep 200ms
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39 call timer_stop(s:timer_id)
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40 call assert_true(m > 1)
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41 call assert_true(s:n > m + 1)
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42 call assert_true(s:n < 9)
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43 endfunction
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45 function! Test_lambda_with_partial()
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46 let l:Cb = function({... -> ['zero', a:1, a:2, a:3]}, ['one', 'two'])
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47 call assert_equal(['zero', 'one', 'two', 'three'], l:Cb('three'))
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48 endfunction
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50 function Test_lambda_fails()
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51 call assert_equal(3, {a, b -> a + b}(1, 2))
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52 call assert_fails('echo {a, a -> a + a}(1, 2)', 'E15:')
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53 call assert_fails('echo {a, b -> a + b)}(1, 2)', 'E15:')
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54 endfunc
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56 func Test_not_lamda()
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57 let x = {'>' : 'foo'}
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58 call assert_equal('foo', x['>'])
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59 endfunc
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61 function! Test_lambda_capture_by_reference()
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62 let v = 1
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63 let l:F = {x -> x + v}
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64 let v = 2
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65 call assert_equal(12, l:F(10))
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66 endfunction
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68 function! Test_lambda_side_effect()
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69 function! s:update_and_return(arr)
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70 let a:arr[1] = 5
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71 return a:arr
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72 endfunction
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74 function! s:foo(arr)
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75 return {-> s:update_and_return(a:arr)}
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76 endfunction
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78 let arr = [3,2,1]
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79 call assert_equal([3, 5, 1], s:foo(arr)())
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80 endfunction
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82 function! Test_lambda_refer_local_variable_from_other_scope()
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83 function! s:foo(X)
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84 return a:X() " refer l:x in s:bar()
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85 endfunction
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86
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87 function! s:bar()
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88 let x = 123
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89 return s:foo({-> x})
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90 endfunction
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92 call assert_equal(123, s:bar())
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93 endfunction
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94
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95 function! Test_lambda_do_not_share_local_variable()
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96 function! s:define_funcs()
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97 let l:One = {-> split(execute("let a = 'abc' | echo a"))[0]}
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98 let l:Two = {-> exists("a") ? a : "no"}
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99 return [l:One, l:Two]
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100 endfunction
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101
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102 let l:F = s:define_funcs()
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103
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104 call assert_equal('no', l:F[1]())
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105 call assert_equal('abc', l:F[0]())
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106 call assert_equal('no', l:F[1]())
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107 endfunction
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108
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109 function! Test_lambda_closure_counter()
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110 function! s:foo()
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111 let x = 0
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112 return {-> [execute("let x += 1"), x][-1]}
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113 endfunction
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114
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115 let l:F = s:foo()
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116 call test_garbagecollect_now()
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117 call assert_equal(1, l:F())
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118 call assert_equal(2, l:F())
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119 call assert_equal(3, l:F())
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120 call assert_equal(4, l:F())
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121 endfunction
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122
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123 function! Test_lambda_with_a_var()
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124 function! s:foo()
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125 let x = 2
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126 return {... -> a:000 + [x]}
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127 endfunction
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128 function! s:bar()
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129 return s:foo()(1)
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130 endfunction
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131
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132 call assert_equal([1, 2], s:bar())
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133 endfunction
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134
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135 function! Test_lambda_call_lambda_from_lambda()
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136 function! s:foo(x)
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137 let l:F1 = {-> {-> a:x}}
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138 return {-> l:F1()}
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139 endfunction
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140
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141 let l:F = s:foo(1)
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142 call assert_equal(1, l:F()())
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143 endfunction
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144
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145 function! Test_lambda_delfunc()
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146 function! s:gen()
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147 let pl = l:
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148 let l:Foo = {-> get(pl, "Foo", get(pl, "Bar", {-> 0}))}
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149 let l:Bar = l:Foo
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150 delfunction l:Foo
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151 return l:Bar
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152 endfunction
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153
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154 let l:F = s:gen()
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155 call assert_fails(':call l:F()', 'E933:')
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156 endfunction
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157
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158 function! Test_lambda_scope()
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159 function! s:NewCounter()
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160 let c = 0
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161 return {-> [execute('let c += 1'), c][-1]}
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162 endfunction
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163
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164 function! s:NewCounter2()
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165 return {-> [execute('let c += 100'), c][-1]}
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166 endfunction
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167
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168 let l:C = s:NewCounter()
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169 let l:D = s:NewCounter2()
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170
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171 call assert_equal(1, l:C())
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172 call assert_fails(':call l:D()', 'E15:') " E121: then E15:
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173 call assert_equal(2, l:C())
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174 endfunction
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175
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176 function! Test_lambda_share_scope()
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177 function! s:New()
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178 let c = 0
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179 let l:Inc0 = {-> [execute('let c += 1'), c][-1]}
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180 let l:Dec0 = {-> [execute('let c -= 1'), c][-1]}
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181 return [l:Inc0, l:Dec0]
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182 endfunction
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183
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184 let [l:Inc, l:Dec] = s:New()
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185
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186 call assert_equal(1, l:Inc())
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187 call assert_equal(2, l:Inc())
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188 call assert_equal(1, l:Dec())
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189 endfunction
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190
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191 function! Test_lambda_circular_reference()
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192 function! s:Foo()
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193 let d = {}
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194 let d.f = {-> d}
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195 return d.f
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196 endfunction
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197
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198 call s:Foo()
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199 call test_garbagecollect_now()
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200 let i = 0 | while i < 10000 | call s:Foo() | let i+= 1 | endwhile
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201 call test_garbagecollect_now()
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202 endfunction
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203
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204 function! Test_lambda_combination()
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205 call assert_equal(2, {x -> {x -> x}}(1)(2))
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206 call assert_equal(10, {y -> {x -> x(y)(10)}({y -> y})}({z -> z}))
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207 call assert_equal(5.0, {x -> {y -> x / y}}(10)(2.0))
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208 call assert_equal(6, {x -> {y -> {z -> x + y + z}}}(1)(2)(3))
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209
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210 call assert_equal(6, {x -> {f -> f(x)}}(3)({x -> x * 2}))
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211 call assert_equal(6, {f -> {x -> f(x)}}({x -> x * 2})(3))
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212
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213 " Z combinator
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214 let Z = {f -> {x -> f({y -> x(x)(y)})}({x -> f({y -> x(x)(y)})})}
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215 let Fact = {f -> {x -> x == 0 ? 1 : x * f(x - 1)}}
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216 call assert_equal(120, Z(Fact)(5))
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217 endfunction
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218
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219 function! Test_closure_counter()
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220 function! s:foo()
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221 let x = 0
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222 function! s:bar() closure
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223 let x += 1
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224 return x
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225 endfunction
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226 return function('s:bar')
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227 endfunction
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228
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229 let l:F = s:foo()
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230 call test_garbagecollect_now()
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231 call assert_equal(1, l:F())
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232 call assert_equal(2, l:F())
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233 call assert_equal(3, l:F())
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234 call assert_equal(4, l:F())
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235 endfunction
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236
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237 function! Test_closure_unlet()
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238 function! s:foo()
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239 let x = 1
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240 function! s:bar() closure
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241 unlet x
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242 endfunction
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243 call s:bar()
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244 return l:
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245 endfunction
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246
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247 call assert_false(has_key(s:foo(), 'x'))
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248 call test_garbagecollect_now()
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249 endfunction
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250
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251 function! LambdaFoo()
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252 let x = 0
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253 function! LambdaBar() closure
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254 let x += 1
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255 return x
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256 endfunction
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257 return function('LambdaBar')
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258 endfunction
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259
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260 func Test_closure_refcount()
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261 let g:Count = LambdaFoo()
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262 call test_garbagecollect_now()
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263 call assert_equal(1, g:Count())
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264 let g:Count2 = LambdaFoo()
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265 call test_garbagecollect_now()
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266 call assert_equal(1, g:Count2())
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267 call assert_equal(2, g:Count())
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268 call assert_equal(3, g:Count2())
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269
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270 delfunc LambdaFoo
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271 delfunc LambdaBar
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272 endfunc
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273
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274 func Test_named_function_closure()
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275 func! Afoo()
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276 let x = 14
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277 func! s:Abar() closure
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278 return x
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279 endfunc
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280 call assert_equal(14, s:Abar())
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281 endfunc
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282 call Afoo()
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283 call assert_equal(14, s:Abar())
8037eb704e93 commit https://github.com/vim/vim/commit/bc7ce675b2d1c9fb58c067eff3edd59abc30aba4
Christian Brabandt <cb@256bit.org>
parents: 9727
diff changeset
284 call test_garbagecollect_now()
8037eb704e93 commit https://github.com/vim/vim/commit/bc7ce675b2d1c9fb58c067eff3edd59abc30aba4
Christian Brabandt <cb@256bit.org>
parents: 9727
diff changeset
285 call assert_equal(14, s:Abar())
8037eb704e93 commit https://github.com/vim/vim/commit/bc7ce675b2d1c9fb58c067eff3edd59abc30aba4
Christian Brabandt <cb@256bit.org>
parents: 9727
diff changeset
286 endfunc