Nim/tests/stdlib/tmath.nim

discard """
  action: run
  output: '''[Suite] random int

[Suite] random float

[Suite] ^

'''
"""

import math, random, os
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)
    os.sleep(200)
    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)
    os.sleep(200)
    randomize()
    var rand2:float = random(1000000.0)
    check rand1 != rand2

suite "^":
  test "compiles for valid types":
    check: compiles(5 ^ 2)
    check: compiles(5.5 ^ 2)
    check: compiles(5.5 ^ 2.int8)
    check: compiles(5.5 ^ 2.uint)
    check: compiles(5.5 ^ 2.uint8)
    check: not compiles(5.5 ^ 2.2)