schema-sql-generator 0.2.0

A set of tools to manage relational database schemas
Documentation 
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pub fn to_snake_case(s: &str) -> String {
    let mut result = String::new();
    let mut prev_underscore = false;

    for ch in s.chars() {
        if ch.is_uppercase() && !prev_underscore && !result.is_empty() {
            result.push('_');
        }
        result.push(ch.to_lowercase().next().unwrap());
        prev_underscore = ch == '_';
    }

    result
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_to_snake_case() {
        assert_eq!(to_snake_case("GenderType"), "gender_type");
        assert_eq!(to_snake_case("ShowInModuleType"), "show_in_module_type");
        assert_eq!(to_snake_case("TestEnumType"), "test_enum_type");
        assert_eq!(to_snake_case("ABC"), "a_b_c");
        assert_eq!(to_snake_case("simpleType"), "simple_type");
        assert_eq!(to_snake_case("already_snake"), "already_snake");
    }
}