StratoSDK is a framework with a declarative approach similar to Flutter/React, written and designed entirely for Rust.
| 1 | use super::*; |
| 2 | |
| 3 | #[test] |
| 4 | fn test_str_index_map_get_byte_index() { |
| 5 | let text = "ab😈■d"; |
| 6 | let str_index_map = StrIndexMap::new(text); |
| 7 | |
| 8 | assert_eq!(str_index_map.byte_index(0), Some(0)); |
| 9 | assert_eq!(str_index_map.byte_index(1), Some(1)); |
| 10 | assert_eq!(str_index_map.byte_index(2), Some(2)); |
| 11 | |
| 12 | // The character at index 2 (😈) is 4 bytes, which means the character at index 3 (■) starts at |
| 13 | // byte index 6. |
| 14 | assert_eq!(str_index_map.byte_index(3), Some(6)); |
| 15 | // The character at index 3 (■) is 3 bytes, which means the character at index 4 (d) starts at |
| 16 | // byte index 9. |
| 17 | assert_eq!(str_index_map.byte_index(4), Some(9)); |
| 18 | |
| 19 | // The backing string only has 5 characters. Ensure we return None in the case a character index |
| 20 | // that isn't included in the string is passed. |
| 21 | assert_eq!(str_index_map.byte_index(5), None); |
| 22 | } |
| 23 | |
| 24 | #[test] |
| 25 | fn test_str_index_map_get_char_index() { |
| 26 | let text = "ab😈■d"; |
| 27 | let str_index_map = StrIndexMap::new(text); |
| 28 | |
| 29 | assert_eq!(str_index_map.char_index(0), Some(0)); |
| 30 | assert_eq!(str_index_map.char_index(1), Some(1)); |
| 31 | assert_eq!(str_index_map.char_index(2), Some(2)); |
| 32 | |
| 33 | // The character at index 2 (😈) is 4 bytes, which means the character at index 3 (■) starts at |
| 34 | // byte index 6. |
| 35 | assert_eq!(str_index_map.char_index(6), Some(3)); |
| 36 | // The character at index 3 (■) is 3 bytes, which means the character at index 4 (d) starts at |
| 37 | // byte index 9. |
| 38 | assert_eq!(str_index_map.char_index(9), Some(4)); |
| 39 | |
| 40 | // The backing string only has 10 bytes. Ensure we return None in the case a byte index |
| 41 | // that isn't included in the string is passed. |
| 42 | assert_eq!(str_index_map.char_index(10), None); |
| 43 | |
| 44 | // Byte index 3 is not a char boundary, so we should return None. |
| 45 | assert_eq!(str_index_map.char_index(3), None); |
| 46 | } |
| 47 |