From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- library/core/tests/iter/adapters/cycle.rs | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 library/core/tests/iter/adapters/cycle.rs (limited to 'library/core/tests/iter/adapters/cycle.rs') diff --git a/library/core/tests/iter/adapters/cycle.rs b/library/core/tests/iter/adapters/cycle.rs new file mode 100644 index 000000000..8831c09b4 --- /dev/null +++ b/library/core/tests/iter/adapters/cycle.rs @@ -0,0 +1,31 @@ +use core::iter::*; + +#[test] +fn test_cycle() { + let cycle_len = 3; + let it = (0..).step_by(1).take(cycle_len).cycle(); + assert_eq!(it.size_hint(), (usize::MAX, None)); + for (i, x) in it.take(100).enumerate() { + assert_eq!(i % cycle_len, x); + } + + let mut it = (0..).step_by(1).take(0).cycle(); + assert_eq!(it.size_hint(), (0, Some(0))); + assert_eq!(it.next(), None); + + assert_eq!(empty::().cycle().fold(0, |acc, x| acc + x), 0); + + assert_eq!(once(1).cycle().skip(1).take(4).fold(0, |acc, x| acc + x), 4); + + assert_eq!((0..10).cycle().take(5).sum::(), 10); + assert_eq!((0..10).cycle().take(15).sum::(), 55); + assert_eq!((0..10).cycle().take(25).sum::(), 100); + + let mut iter = (0..10).cycle(); + iter.nth(14); + assert_eq!(iter.take(8).sum::(), 38); + + let mut iter = (0..10).cycle(); + iter.nth(9); + assert_eq!(iter.take(3).sum::(), 3); +} -- cgit v1.2.3