1 files changed, 61 insertions, 0 deletions
diff --git a/tests/stdlib/tmath.nim b/tests/stdlib/tmath.nim
new file mode 100644
index 000000000..fc9486093
--- /dev/null
+++ b/tests/stdlib/tmath.nim
@@ -0,0 +1,61 @@
+import math
+import unittest
+import sets
+
+suite "random int":
+  test "there might be some randomness":
+    var set = initSet[int](128)
+    randomize()
+    for i in 1..1000:
+      incl(set, random(high(int)))
+    check len(set) == 1000
+  test "single number bounds work":
+    randomize()
+    var rand: int
+    for i in 1..1000:
+      rand = random(1000)
+      check rand < 1000
+      check rand > -1
+  test "slice bounds work":
+    randomize()
+    var rand: int
+    for i in 1..1000:
+      rand = random(100..1000)
+      check rand < 1000
+      check rand >= 100
+  test "randomize() again gives new numbers":      
+    randomize()
+    var rand1 = random(1000000)
+    randomize()
+    var rand2 = random(1000000)
+    check rand1 != rand2
+    
+
+suite "random float":
+  test "there might be some randomness":
+    var set = initSet[float](128)
+    randomize()
+    for i in 1..100:
+      incl(set, random(1.0))
+    check len(set) == 100
+  test "single number bounds work":
+    randomize()
+    var rand: float
+    for i in 1..1000:
+      rand = random(1000.0)
+      check rand < 1000.0
+      check rand > -1.0
+  test "slice bounds work":
+    randomize()
+    var rand: float
+    for i in 1..1000:
+      rand = random(100.0..1000.0)
+      check rand < 1000.0
+      check rand >= 100.0
+  test "randomize() again gives new numbers":      
+    randomize()
+    var rand1:float = random(1000000.0)
+    randomize()
+    var rand2:float = random(1000000.0)
+    check rand1 != rand2
+