#[cfg(all(target_family = "wasm", not(target_os = "wasi")))]
use wasm_bindgen_test::wasm_bindgen_test as test;
#[cfg(all(target_family = "wasm", not(target_os = "wasi")))]
wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);
#[test]
fn bool() {
for x in &[false, true] {
while fastrand::bool() != *x {}
}
}
#[test]
fn u8() {
for x in 0..10 {
while fastrand::u8(..10) != x {}
}
for x in 200..=u8::MAX {
while fastrand::u8(200..) != x {}
}
}
#[test]
fn i8() {
for x in -128..-120 {
while fastrand::i8(..-120) != x {}
}
for x in 120..=127 {
while fastrand::i8(120..) != x {}
}
}
#[test]
fn u32() {
for n in 1u32..10_000 {
let n = n.wrapping_mul(n);
let n = n.wrapping_mul(n);
if n != 0 {
for _ in 0..1000 {
assert!(fastrand::u32(..n) < n);
}
}
}
}
#[test]
fn u64() {
for n in 1u64..10_000 {
let n = n.wrapping_mul(n);
let n = n.wrapping_mul(n);
let n = n.wrapping_mul(n);
if n != 0 {
for _ in 0..1000 {
assert!(fastrand::u64(..n) < n);
}
}
}
}
#[test]
fn u128() {
for n in 1u128..10_000 {
let n = n.wrapping_mul(n);
let n = n.wrapping_mul(n);
let n = n.wrapping_mul(n);
let n = n.wrapping_mul(n);
if n != 0 {
for _ in 0..1000 {
assert!(fastrand::u128(..n) < n);
}
}
}
}
#[test]
fn f32() {
let mut r = fastrand::Rng::with_seed(0);
let tiny = (-24.0f32).exp2();
let mut count_tiny_nonzero = 0;
let mut count_top_half = 0;
for _ in 0..100_000_000 {
let x = r.f32();
assert!((0.0..1.0).contains(&x));
if x > 0.0 && x < tiny {
count_tiny_nonzero += 1;
} else if x > 0.5 {
count_top_half += 1;
}
}
assert!(count_top_half >= 49_000_000);
assert!(count_tiny_nonzero > 0);
}
#[test]
fn f32_inclusive() {
let mut r = fastrand::Rng::with_seed(0);
let tiny = (-24.0f32).exp2();
let mut count_top_half = 0;
let mut count_tiny_nonzero = 0;
let mut count_one = 0;
for _ in 0..100_000_000 {
let x = r.f32_inclusive();
assert!((0.0..=1.0).contains(&x));
if x == 1.0 {
count_one += 1;
} else if x > 0.5 {
count_top_half += 1;
} else if x > 0.0 && x < tiny {
count_tiny_nonzero += 1;
}
}
assert!(count_top_half >= 49_000_000);
assert!(count_one > 0);
assert!(count_tiny_nonzero > 0);
}
#[test]
fn f64() {
let mut r = fastrand::Rng::with_seed(0);
let mut count_top_half = 0;
for _ in 0..100_000_000 {
let x = r.f64();
assert!((0.0..1.0).contains(&x));
if x > 0.5 {
count_top_half += 1;
}
}
assert!(count_top_half >= 49_000_000);
}
#[test]
fn f64_inclusive() {
let mut r = fastrand::Rng::with_seed(0);
let mut count_top_half = 0;
for _ in 0..100_000_000 {
let x = r.f64_inclusive();
assert!((0.0..=1.0).contains(&x));
if x > 0.5 {
count_top_half += 1;
}
}
assert!(count_top_half >= 49_000_000);
}
#[test]
fn digit() {
for base in 1..36 {
let result = fastrand::digit(base);
assert!(result.is_ascii_digit() || result.is_ascii_lowercase());
}
}
#[test]
fn global_rng_choice() {
let items = [1, 4, 9, 5, 2, 3, 6, 7, 8, 0];
for item in &items {
while fastrand::choice(&items).unwrap() != item {}
}
}
#[test]
fn global_rng_alphabetic() {
for _ in 0..1000 {
let result = fastrand::alphabetic();
assert!(result.is_ascii_alphabetic())
}
}
#[test]
fn global_rng_lowercase() {
for _ in 0..1000 {
let result = fastrand::lowercase();
assert!(result.is_ascii_lowercase())
}
}
#[test]
fn global_rng_uppercase() {
for _ in 0..1000 {
let result = fastrand::uppercase();
assert!(result.is_ascii_uppercase())
}
}
#[test]
fn fill() {
let mut r = fastrand::Rng::new();
let mut a = [0u8; 64];
let mut b = [0u8; 64];
r.fill(&mut a);
r.fill(&mut b);
assert_ne!(a, b);
let mut a = [0u8; 9];
let mut b = [0u8; 9];
r.fill(&mut a);
r.fill(&mut b);
assert_ne!(a, b);
}
#[test]
fn global_rng_fill() {
let mut a = [0u8; 64];
let mut b = [0u8; 64];
fastrand::fill(&mut a);
fastrand::fill(&mut b);
assert_ne!(a, b);
}
#[test]
fn rng() {
let mut r = fastrand::Rng::new();
assert_ne!(r.u64(..), r.u64(..));
r.seed(7);
let a = r.u64(..);
r.seed(7);
let b = r.u64(..);
assert_eq!(a, b);
}
#[test]
fn rng_init() {
let mut a = fastrand::Rng::new();
let mut b = fastrand::Rng::new();
assert_ne!(a.u64(..), b.u64(..));
a.seed(7);
b.seed(7);
assert_eq!(a.u64(..), b.u64(..));
}
#[test]
fn rng_digit() {
let mut rng = fastrand::Rng::new();
for base in 1..36 {
let result = rng.digit(base);
assert!(result.is_ascii_digit() || result.is_ascii_lowercase());
}
}
#[test]
#[should_panic]
fn rng_digit_panic_1() {
let mut rng = fastrand::Rng::new();
let _result = rng.digit(0);
}
#[test]
#[should_panic]
fn rng_digit_panic_2() {
let mut rng = fastrand::Rng::new();
let base = rng.u32(37..);
let _result = rng.digit(base);
}
#[test]
fn with_seed() {
let mut a = fastrand::Rng::with_seed(7);
let mut b = fastrand::Rng::new();
b.seed(7);
assert_eq!(a.u64(..), b.u64(..));
}
#[test]
fn choose_multiple() {
let mut a = fastrand::Rng::new();
let mut elements = (0..20).collect::<Vec<_>>();
while !elements.is_empty() {
let chosen = a.choose_multiple(0..20, 5);
for &x in &chosen {
elements.retain(|&y| y != x);
}
}
let empty_elements: Vec<i32> = Vec::new();
let empty_result = a.choose_multiple(empty_elements, 5);
assert!(empty_result.is_empty());
}
#[test]
fn choice() {
let items = [1, 4, 9, 5, 2, 3, 6, 7, 8, 0];
let mut r = fastrand::Rng::new();
for item in &items {
while r.choice(&items).unwrap() != item {}
}
}
#[test]
fn choice_empty() {
let mut rng = fastrand::Rng::new();
let data: Vec<i32> = Vec::new();
let result = rng.choice(data);
assert!(result.is_none());
}
#[test]
fn lowercase() {
let mut rng = fastrand::Rng::new();
for _ in 0..1000 {
let result = rng.lowercase();
assert!(result.is_ascii_lowercase())
}
}
#[test]
fn alphabetic() {
let mut rng = fastrand::Rng::new();
for _ in 0..1000 {
let result = rng.alphabetic();
assert!(result.is_ascii_alphabetic())
}
}
#[test]
fn uppercase() {
let mut rng = fastrand::Rng::new();
for _ in 0..1000 {
let result = rng.uppercase();
assert!(result.is_ascii_uppercase())
}
}
#[test]
#[should_panic]
fn char_panic() {
let mut rng = fastrand::Rng::new();
let _result = rng.char('z'..='a');
}
#[test]
fn char() {
use core::ops::Bound;
let mut rng = fastrand::Rng::new();
let result = rng.char(..);
assert!(result >= 0 as char && result <= core::char::MAX);
let result = rng.char((Bound::Excluded('0'), Bound::Excluded('9')));
for _ in 0..1000 {
assert!(result > '0' && result < '9');
}
}