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pub trait TitleCase: ToOwned {
fn to_title_case(&self) -> Self::Owned;
}
impl TitleCase for str {
fn to_title_case(&self) -> String {
::transform(self, |c, s| {
s.push(' ');
s.extend(c.to_uppercase())
}, |c, s| {
if s.len() == 0 {
s.extend(c.to_uppercase())
} else {
s.extend(c.to_lowercase())
}
})
}
}
#[cfg(test)]
mod tests {
use super::TitleCase;
macro_rules! t {
($t:ident : $s1:expr => $s2:expr) => {
#[test]
fn $t() {
assert_eq!($s1.to_title_case(), $s2)
}
}
}
t!(test1: "CamelCase" => "Camel Case");
t!(test2: "This is Human case." => "This Is Human Case");
t!(test3: "MixedUp CamelCase, with some Spaces" => "Mixed Up Camel Case With Some Spaces");
t!(test4: "mixed_up snake_case, with some _spaces" => "Mixed Up Snake Case With Some Spaces");
t!(test5: "kebab-case" => "Kebab Case");
t!(test6: "SHOUTY_SNAKE_CASE" => "Shouty Snake Case");
t!(test7: "snake_case" => "Snake Case");
t!(test8: "this-contains_ ALLkinds OfWord_Boundaries" => "This Contains All Kinds Of Word Boundaries");
}