new tester; all tests categorized

tests/stdlib/tmath.nim

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+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
+
+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