projects / rustc.git / blame
| Commit | Line | Data |
|---|---|---|
| 136023e0 | 1 | use anyhow::{anyhow, Chain, Error}; |
| dfeec247 XL |
2 | |
| 3 | fn error() -> Error { | |
| 4 | anyhow!(0).context(1).context(2).context(3) | |
| 5 | } | |
| 6 | ||
| 7 | #[test] | |
| 8 | fn test_iter() { | |
| 9 | let e = error(); | |
| 10 | let mut chain = e.chain(); | |
| 11 | assert_eq!("3", chain.next().unwrap().to_string()); | |
| 12 | assert_eq!("2", chain.next().unwrap().to_string()); | |
| 13 | assert_eq!("1", chain.next().unwrap().to_string()); | |
| 14 | assert_eq!("0", chain.next().unwrap().to_string()); | |
| 15 | assert!(chain.next().is_none()); | |
| 16 | assert!(chain.next_back().is_none()); | |
| 17 | } | |
| 18 | ||
| 19 | #[test] | |
| 20 | fn test_rev() { | |
| 21 | let e = error(); | |
| 22 | let mut chain = e.chain().rev(); | |
| 23 | assert_eq!("0", chain.next().unwrap().to_string()); | |
| 24 | assert_eq!("1", chain.next().unwrap().to_string()); | |
| 25 | assert_eq!("2", chain.next().unwrap().to_string()); | |
| 26 | assert_eq!("3", chain.next().unwrap().to_string()); | |
| 27 | assert!(chain.next().is_none()); | |
| 28 | assert!(chain.next_back().is_none()); | |
| 29 | } | |
| 30 | ||
| 31 | #[test] | |
| 32 | fn test_len() { | |
| 33 | let e = error(); | |
| 34 | let mut chain = e.chain(); | |
| 35 | assert_eq!(4, chain.len()); | |
| 136023e0 | 36 | assert_eq!((4, Some(4)), chain.size_hint()); |
| dfeec247 XL |
37 | assert_eq!("3", chain.next().unwrap().to_string()); |
| 38 | assert_eq!(3, chain.len()); | |
| 136023e0 | 39 | assert_eq!((3, Some(3)), chain.size_hint()); |
| dfeec247 XL |
40 | assert_eq!("0", chain.next_back().unwrap().to_string()); |
| 41 | assert_eq!(2, chain.len()); | |
| 136023e0 | 42 | assert_eq!((2, Some(2)), chain.size_hint()); |
| dfeec247 XL |
43 | assert_eq!("2", chain.next().unwrap().to_string()); |
| 44 | assert_eq!(1, chain.len()); | |
| 136023e0 | 45 | assert_eq!((1, Some(1)), chain.size_hint()); |
| dfeec247 XL |
46 | assert_eq!("1", chain.next_back().unwrap().to_string()); |
| 47 | assert_eq!(0, chain.len()); | |
| 136023e0 | 48 | assert_eq!((0, Some(0)), chain.size_hint()); |
| dfeec247 XL |
49 | assert!(chain.next().is_none()); |
| 50 | } | |
| 136023e0 XL |
51 | |
| 52 | #[test] | |
| 53 | fn test_default() { | |
| 54 | let mut c = Chain::default(); | |
| 55 | assert!(c.next().is_none()); | |
| 56 | } | |
| 57 | ||
| 58 | #[test] | |
| 59 | fn test_clone() { | |
| 60 | let e = error(); | |
| 61 | let mut chain = e.chain().clone(); | |
| 62 | assert_eq!("3", chain.next().unwrap().to_string()); | |
| 63 | assert_eq!("2", chain.next().unwrap().to_string()); | |
| 64 | assert_eq!("1", chain.next().unwrap().to_string()); | |
| 65 | assert_eq!("0", chain.next().unwrap().to_string()); | |
| 66 | assert!(chain.next().is_none()); | |
| 67 | assert!(chain.next_back().is_none()); | |
| 68 | } |