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// Test that a custom handler works on wasm32-unknown-unknown
#![cfg(all(
target_arch = "wasm32",
target_os = "unknown",
feature = "custom",
not(feature = "js")
))]
use wasm_bindgen_test::wasm_bindgen_test as test;
#[cfg(feature = "test-in-browser")]
wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);
use core::{
num::NonZeroU32,
sync::atomic::{AtomicU8, Ordering},
};
use getrandom::{getrandom, register_custom_getrandom, Error};
fn len7_err() -> Error {
NonZeroU32::new(Error::INTERNAL_START + 7).unwrap().into()
}
fn super_insecure_rng(buf: &mut [u8]) -> Result<(), Error> {
// Length 7 buffers return a custom error
if buf.len() == 7 {
return Err(len7_err());
}
// Otherwise, increment an atomic counter
static COUNTER: AtomicU8 = AtomicU8::new(0);
for b in buf {
*b = COUNTER.fetch_add(1, Ordering::Relaxed);
}
Ok(())
}
register_custom_getrandom!(super_insecure_rng);
#[test]
fn custom_rng_output() {
let mut buf = [0u8; 4];
assert_eq!(getrandom(&mut buf), Ok(()));
assert_eq!(buf, [0, 1, 2, 3]);
assert_eq!(getrandom(&mut buf), Ok(()));
assert_eq!(buf, [4, 5, 6, 7]);
}
#[test]
fn rng_err_output() {
assert_eq!(getrandom(&mut [0; 7]), Err(len7_err()));
}
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