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" Tests for srand() and rand()
source check.vim
source shared.vim
func Test_Rand()
let r = srand(123456789)
call assert_equal([1573771921, 319883699, 2742014374, 1324369493], r)
call assert_equal(4284103975, rand(r))
call assert_equal(1001954530, rand(r))
call assert_equal(2701803082, rand(r))
call assert_equal(2658065534, rand(r))
call assert_equal(3104308804, rand(r))
let s = srand()
" using /dev/urandom or used time, result is different each time
call assert_notequal(s, srand())
call test_srand_seed(123456789)
call assert_equal(4284103975, rand())
call assert_equal(1001954530, rand())
call test_srand_seed()
call assert_fails('echo srand(1.2)', 'E805:')
call assert_fails('echo srand([1])', 'E745:')
call assert_fails('echo rand("burp")', 'E475:')
call assert_fails('echo rand([1, 2, 3])', 'E730:')
call assert_fails('echo rand([[1], 2, 3, 4])', 'E730:')
call assert_fails('echo rand([1, [2], 3, 4])', 'E730:')
call assert_fails('echo rand([1, 2, [3], 4])', 'E730:')
call assert_fails('echo rand([1, 2, 3, [4]])', 'E730:')
endfunc
func Test_issue_5587()
call rand()
call garbagecollect()
call rand()
endfunc
func Test_srand()
CheckNotGui
let cmd = GetVimCommand() .. ' -V -es -c "echo rand()" -c qa!'
let bad = 0
for _ in range(10)
echo cmd
let result1 = system(cmd)
let result2 = system(cmd)
if result1 ==# result2
let bad += 1
endif
endfor
call assert_inrange(0, 4, bad)
endfunc
" vim: shiftwidth=2 sts=2 expandtab
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