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v/vlib/rand/random_numbers_test.v
2020-04-27 22:53:26 +02:00

59 lines
979 B
V

import rand
const (
rnd_count = 20
seeds = [42, 256]
)
fn test_rand_reproducibility() {
for seed in seeds {
mut randoms1 := gen_randoms(seed)
mut randoms2 := gen_randoms(seed)
assert_randoms_equal(randoms1, randoms2)
}
}
fn test_rand_r_reproducibility() {
for seed in seeds {
mut randoms1 := gen_randoms_r(seed)
mut randoms2 := gen_randoms_r(seed)
assert_randoms_equal(randoms1, randoms2)
}
}
fn test_rand_r_seed_update() {
seed := 10
for _ in 0..rnd_count {
prev_seed := seed
_ := rand.rand_r(&seed)
assert prev_seed != seed
}
}
fn gen_randoms(seed int) []int {
mut randoms := [0].repeat(rnd_count)
rand.seed(seed)
for i in 0..rnd_count {
randoms[i] = rand.next(100)
}
return randoms
}
fn gen_randoms_r(seed int) []int {
mut randoms := [0].repeat(rnd_count)
for i in 0..rnd_count {
randoms[i] = rand.rand_r(&seed)
}
return randoms
}
fn assert_randoms_equal(r1, r2 []int) {
for i in 0..rnd_count {
assert r1[i] == r2[i]
}
}