1" Tests for srand() and rand() 2 3func Test_Rand() 4 let r = srand(123456789) 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)) 11 12 call test_settime(12341234) 13 let s = srand() 14 if filereadable('/dev/urandom') 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 23 24 call srand() 25 let v = rand() 26 call assert_notequal(v, rand()) 27 28 if has('float') 29 call assert_fails('echo srand(1.2)', 'E805:') 30 endif 31 call assert_fails('echo srand([1])', 'E745:') 32 call assert_fails('echo rand("burp")', 'E475:') 33 call assert_fails('echo rand([1, 2, 3])', 'E475:') 34 call assert_fails('echo rand([[1], 2, 3, 4])', '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 39 call test_settime(0) 40endfunc 41