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