| use crate::{capitalize, lowercase, transform}; |
| |
| /// This trait defines a mixed case conversion. |
| /// |
| /// In mixedCase, word boundaries are indicated by capital letters, excepting |
| /// the first word. |
| /// |
| /// ## Example: |
| /// |
| /// ```rust |
| /// use heck::MixedCase; |
| /// |
| /// let sentence = "It is we who built these palaces and cities."; |
| /// assert_eq!(sentence.to_mixed_case(), "itIsWeWhoBuiltThesePalacesAndCities"); |
| /// ``` |
| pub trait MixedCase: ToOwned { |
| /// Convert this type to mixed case. |
| fn to_mixed_case(&self) -> Self::Owned; |
| } |
| |
| impl MixedCase for str { |
| fn to_mixed_case(&self) -> String { |
| transform( |
| self, |
| |s, out| { |
| if out.is_empty() { |
| lowercase(s, out); |
| } else { |
| capitalize(s, out) |
| } |
| }, |
| |_| {}, |
| ) |
| } |
| } |
| |
| #[cfg(test)] |
| mod tests { |
| use super::MixedCase; |
| |
| macro_rules! t { |
| ($t:ident : $s1:expr => $s2:expr) => { |
| #[test] |
| fn $t() { |
| assert_eq!($s1.to_mixed_case(), $s2) |
| } |
| }; |
| } |
| |
| t!(test1: "CamelCase" => "camelCase"); |
| t!(test2: "This is Human case." => "thisIsHumanCase"); |
| t!(test3: "MixedUP CamelCase, with some Spaces" => "mixedUpCamelCaseWithSomeSpaces"); |
| t!(test4: "mixed_up_ snake_case, with some _spaces" => "mixedUpSnakeCaseWithSomeSpaces"); |
| t!(test5: "kebab-case" => "kebabCase"); |
| t!(test6: "SHOUTY_SNAKE_CASE" => "shoutySnakeCase"); |
| t!(test7: "snake_case" => "snakeCase"); |
| t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "thisContainsAllKindsOfWordBoundaries"); |
| t!(test9: "XΣXΣ baffle" => "xσxςBaffle"); |
| t!(test10: "XMLHttpRequest" => "xmlHttpRequest"); |
| // TODO unicode tests |
| } |