| #![no_std] |
| |
| extern crate rand; |
| |
| use rand::SeedableRng; |
| use rand::rngs::SmallRng; |
| use rand::distributions::{Distribution, Bernoulli}; |
| |
| /// This test should make sure that we don't accidentally have undefined |
| /// behavior for large propabilties due to |
| /// https://github.com/rust-lang/rust/issues/10184. |
| /// Expressions like `1.0*(u64::MAX as f64) as u64` have to be avoided. |
| #[test] |
| fn large_probability() { |
| let p = 1. - ::core::f64::EPSILON / 2.; |
| assert!(p < 1.); |
| let d = Bernoulli::new(p); |
| let mut rng = SmallRng::from_seed( |
| [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]); |
| for _ in 0..10 { |
| assert!(d.sample(&mut rng), "extremely unlikely to fail by accident"); |
| } |
| } |
