44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
#![allow(unused_imports)] // FIXME for macOS
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extern crate rand;
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use rand::{SeedableRng, FromEntropy, Rng, rngs::SmallRng};
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#[test]
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fn simple() {
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assert_eq!(4, 4);
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}
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// Having more than 1 test does seem to make a difference
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// (i.e., this calls ptr::swap which having just one test does not).
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#[test]
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fn fixed_rng() {
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let mut rng = rand::rngs::StdRng::seed_from_u64(0xdeadcafe);
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let x: u32 = rng.gen();
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let y: u32 = rng.gen();
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assert_ne!(x, y);
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}
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#[test]
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fn entropy_rng() {
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#[cfg(not(target_os="macos"))] // FIXME entropy does not work on macOS
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// (Not disabling the entire test as that would change the output.)
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{
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// Use this opportunity to test querying the RNG (needs an external crate, hence tested here and not in the compiletest suite)
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let mut rng = SmallRng::from_entropy();
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let _val = rng.gen::<i32>();
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// Also try per-thread RNG.
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let mut rng = rand::thread_rng();
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let _val = rng.gen::<i32>();
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}
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}
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// A test that won't work on miri
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#[cfg(not(miri))]
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#[test]
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fn does_not_work_on_miri() {
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let x = 0u8;
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assert!(&x as *const _ as usize % 4 < 4);
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}
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