cf85546863
Modify the custom tests so that they would have detected and prevented the issue fixed in https://github.com/rust-random/getrandom/pull/298.
55 lines
1.3 KiB
Rust
55 lines
1.3 KiB
Rust
// 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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use core::num::NonZeroU32;
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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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// `getrandom` guarantees it will not call any implementation if the output
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// buffer is empty.
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assert!(!buf.is_empty());
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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, fill bytes based on input length
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let mut start = buf.len() as u8;
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for b in buf {
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*b = start;
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start = start.wrapping_mul(3);
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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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use getrandom::getrandom as getrandom_impl;
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mod common;
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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, [4, 12, 36, 108]);
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let mut buf = [0u8; 3];
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assert_eq!(getrandom(&mut buf), Ok(()));
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assert_eq!(buf, [3, 9, 27]);
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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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