19 lines
451 B
Rust
19 lines
451 B
Rust
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use core::iter::*;
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#[test]
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fn test_copied() {
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let xs = [2, 4, 6, 8];
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let mut it = xs.iter().copied();
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assert_eq!(it.len(), 4);
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assert_eq!(it.next(), Some(2));
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assert_eq!(it.len(), 3);
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assert_eq!(it.next(), Some(4));
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assert_eq!(it.len(), 2);
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assert_eq!(it.next_back(), Some(8));
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assert_eq!(it.len(), 1);
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assert_eq!(it.next_back(), Some(6));
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assert_eq!(it.len(), 0);
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assert_eq!(it.next_back(), None);
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}
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