diff --git a/src/seq/mod.rs b/src/seq/mod.rs index ba792ae8ba5..84ea2afc52d 100644 --- a/src/seq/mod.rs +++ b/src/seq/mod.rs @@ -893,4 +893,30 @@ mod test { Some(90) ); } + + #[test] + fn value_stability_choose_multiple() { + fn do_test>(iter: I, v: &[u32]) { + let mut rng = crate::test::rng(412); + let mut buf = [0u32; 8]; + assert_eq!(iter.choose_multiple_fill(&mut rng, &mut buf), v.len()); + assert_eq!(&buf[0..v.len()], v); + } + + do_test(0..4, &[0, 1, 2, 3]); + do_test(0..8, &[0, 1, 2, 3, 4, 5, 6, 7]); + do_test(0..100, &[58, 78, 80, 92, 43, 8, 96, 7]); + + #[cfg(feature = "alloc")] + { + fn do_test>(iter: I, v: &[u32]) { + let mut rng = crate::test::rng(412); + assert_eq!(iter.choose_multiple(&mut rng, v.len()), v); + } + + do_test(0..4, &[0, 1, 2, 3]); + do_test(0..8, &[0, 1, 2, 3, 4, 5, 6, 7]); + do_test(0..100, &[58, 78, 80, 92, 43, 8, 96, 7]); + } + } }