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v/vlib/crypto/rand/rand_test.v

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// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
import crypto.rand
fn test_crypto_rand() {
no_bytes := 100
max_percentage_diff := 20
r1 := rand.read(no_bytes) or {
assert false
return
}
assert r1.len == no_bytes
r2 := rand.read(no_bytes) or {
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assert false
return
}
assert r2.len == no_bytes
mut difference := 0
for i, _ in r1 {
difference += if r1[i] == r2[i] {0} else {1}
}
diff_percentage := f32(100) - (f32(difference)/f32(no_bytes)*100)
assert diff_percentage <= max_percentage_diff
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}