| Bram Moolenaar | 06b0b4b | 2019-11-25 15:40:55 +0100 | [diff] [blame] | 1 | " Tests for srand() and rand() |
| 2 | |
| 3 | func Test_Rand() |
| 4 | let r = srand(123456789) |
| Bram Moolenaar | f8c1f92 | 2019-11-28 22:13:14 +0100 | [diff] [blame] | 5 | call assert_equal([1573771921, 319883699, 2742014374, 1324369493], r) |
| 6 | call assert_equal(4284103975, rand(r)) |
| 7 | call assert_equal(1001954530, rand(r)) |
| 8 | call assert_equal(2701803082, rand(r)) |
| 9 | call assert_equal(2658065534, rand(r)) |
| 10 | call assert_equal(3104308804, rand(r)) |
| Bram Moolenaar | 06b0b4b | 2019-11-25 15:40:55 +0100 | [diff] [blame] | 11 | |
| 12 | call test_settime(12341234) |
| 13 | let s = srand() |
| Bram Moolenaar | 4f645c5 | 2020-02-08 16:40:39 +0100 | [diff] [blame] | 14 | if !has('win32') && filereadable('/dev/urandom') |
| Bram Moolenaar | 07e4a19 | 2019-11-26 12:23:30 +0100 | [diff] [blame] | 15 | " using /dev/urandom |
| 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 |
| Bram Moolenaar | 06b0b4b | 2019-11-25 15:40:55 +0100 | [diff] [blame] | 23 | |
| Bram Moolenaar | 4f645c5 | 2020-02-08 16:40:39 +0100 | [diff] [blame] | 24 | call test_srand_seed(123456789) |
| 25 | call assert_equal(4284103975, rand()) |
| 26 | call assert_equal(1001954530, rand()) |
| 27 | call test_srand_seed() |
| Bram Moolenaar | 06b0b4b | 2019-11-25 15:40:55 +0100 | [diff] [blame] | 28 | |
| Bram Moolenaar | 68e9e5f | 2019-11-28 22:55:43 +0100 | [diff] [blame] | 29 | if has('float') |
| 30 | call assert_fails('echo srand(1.2)', 'E805:') |
| 31 | endif |
| Bram Moolenaar | 06b0b4b | 2019-11-25 15:40:55 +0100 | [diff] [blame] | 32 | call assert_fails('echo srand([1])', 'E745:') |
| Bram Moolenaar | 68e9e5f | 2019-11-28 22:55:43 +0100 | [diff] [blame] | 33 | call assert_fails('echo rand("burp")', 'E475:') |
| Bram Moolenaar | 06b0b4b | 2019-11-25 15:40:55 +0100 | [diff] [blame] | 34 | call assert_fails('echo rand([1, 2, 3])', 'E475:') |
| 35 | call assert_fails('echo rand([[1], 2, 3, 4])', 'E475:') |
| 36 | call assert_fails('echo rand([1, [2], 3, 4])', 'E475:') |
| 37 | call assert_fails('echo rand([1, 2, [3], 4])', 'E475:') |
| 38 | call assert_fails('echo rand([1, 2, 3, [4]])', 'E475:') |
| Bram Moolenaar | 07e4a19 | 2019-11-26 12:23:30 +0100 | [diff] [blame] | 39 | |
| 40 | call test_settime(0) |
| Bram Moolenaar | 06b0b4b | 2019-11-25 15:40:55 +0100 | [diff] [blame] | 41 | endfunc |
| Bram Moolenaar | 4f645c5 | 2020-02-08 16:40:39 +0100 | [diff] [blame] | 42 | |
| 43 | func Test_issue_5587() |
| 44 | call rand() |
| 45 | call garbagecollect() |
| 46 | call rand() |
| 47 | endfunc |