1 files changed, 53 insertions, 0 deletions
diff --git a/mnv/src/testdir/test_random.mnv b/mnv/src/testdir/test_random.mnv
new file mode 100644
index 0000000000..03f56decfc
--- /dev/null
+++ b/mnv/src/testdir/test_random.mnv
@@ -0,0 +1,53 @@
+" Tests for srand() and rand()
+
+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 = GetMNVCommand() .. ' -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
+
+" mnv: shiftwidth=2 sts=2 expandtab