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annotate src/testdir/test_random.vim @ 18732:2513e666aa82 v8.1.2356

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patch 8.1.2356: rand() does not use the best algorithm Commit: https://github.com/vim/vim/commit/f8c1f9200c4b50969a8191a4fe0b0d09edb38979 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Nov 28 22:13:14 2019 +0100 patch 8.1.2356: rand() does not use the best algorithm Problem: rand() does not use the best algorithm. Solution: use xoshiro128** instead of xorshift. (Kaito Udagawa, closes #5279)
author Bram Moolenaar <Bram@vim.org>
date Thu, 28 Nov 2019 22:15:04 +0100
parents aef98a646d3e
children c477006e8857
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1 " Tests for srand() and rand()
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2
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3 func Test_Rand()
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4 let r = srand(123456789)
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5 call assert_equal([1573771921, 319883699, 2742014374, 1324369493], r)
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6 call assert_equal(4284103975, rand(r))
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7 call assert_equal(1001954530, rand(r))
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8 call assert_equal(2701803082, rand(r))
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9 call assert_equal(2658065534, rand(r))
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10 call assert_equal(3104308804, rand(r))
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11
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12 call test_settime(12341234)
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13 let s = srand()
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14 if filereadable('/dev/urandom')
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15 " using /dev/urandom
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16 call assert_notequal(s, srand())
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17 else
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18 " using time()
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19 call assert_equal(s, srand())
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20 call test_settime(12341235)
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21 call assert_notequal(s, srand())
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22 endif
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23
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24 call srand()
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25 let v = rand()
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26 call assert_notequal(v, rand())
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27
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28 call assert_fails('echo srand([1])', 'E745:')
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29 call assert_fails('echo rand([1, 2, 3])', 'E475:')
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30 call assert_fails('echo rand([[1], 2, 3, 4])', 'E475:')
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31 call assert_fails('echo rand([1, [2], 3, 4])', 'E475:')
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32 call assert_fails('echo rand([1, 2, [3], 4])', 'E475:')
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33 call assert_fails('echo rand([1, 2, 3, [4]])', 'E475:')
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34
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35 call test_settime(0)
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36 endfunc