Mercurial > vim

comparison src/testdir/test_random.vim @ 18703:aef98a646d3e v8.1.2343

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
patch 8.1.2343: using time() for srand() is not very random Commit: https://github.com/vim/vim/commit/07e4a197953d12902fb97beb48830a5323a52280 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Nov 26 12:23:30 2019 +0100 patch 8.1.2343: using time() for srand() is not very random Problem: Using time() for srand() is not very random. Solution: use /dev/urandom if available
author Bram Moolenaar <Bram@vim.org>
date Tue, 26 Nov 2019 12:30:04 +0100
parents 128662297ddf
children 2513e666aa82
comparison
equal deleted inserted replaced
18702:fd7bbf832d8f 18703:aef98a646d3e
9 call assert_equal(3633119408, rand(r)) 9 call assert_equal(3633119408, rand(r))
10 call assert_equal(516391518, rand(r)) 10 call assert_equal(516391518, rand(r))
11 11
12 call test_settime(12341234) 12 call test_settime(12341234)
13 let s = srand() 13 let s = srand()
14 call assert_equal(s, srand()) 14 if filereadable('/dev/urandom')
15 call test_settime(12341235) 15 " using /dev/urandom
16 call assert_notequal(s, srand()) 16 call assert_notequal(s, srand())
17 else
18 " using time()
19 call assert_equal(s, srand())
20 call test_settime(12341235)
21 call assert_notequal(s, srand())
22 endif
17 23
18 call srand() 24 call srand()
19 let v = rand() 25 let v = rand()
20 call assert_notequal(v, rand()) 26 call assert_notequal(v, rand())
21 27
23 call assert_fails('echo rand([1, 2, 3])', 'E475:') 29 call assert_fails('echo rand([1, 2, 3])', 'E475:')
24 call assert_fails('echo rand([[1], 2, 3, 4])', 'E475:') 30 call assert_fails('echo rand([[1], 2, 3, 4])', 'E475:')
25 call assert_fails('echo rand([1, [2], 3, 4])', 'E475:') 31 call assert_fails('echo rand([1, [2], 3, 4])', 'E475:')
26 call assert_fails('echo rand([1, 2, [3], 4])', 'E475:') 32 call assert_fails('echo rand([1, 2, [3], 4])', 'E475:')
27 call assert_fails('echo rand([1, 2, 3, [4]])', 'E475:') 33 call assert_fails('echo rand([1, 2, 3, [4]])', 'E475:')
34
35 call test_settime(0)
28 endfunc 36 endfunc