uniprot 0.7.0

Rust data structures and parser for the Uniprot database(s).
Documentation 
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use std::ops::Deref;
use std::ops::DerefMut;
use std::str::FromStr;

use chrono::format::ParseError;
use chrono::naive::NaiveDate;
use chrono::offset::Local;
use chrono::Datelike;

/// A naive date in `YYYY-MM-DD` format.
#[derive(Debug, Clone)]
pub struct Date {
    date: NaiveDate,
}

impl Date {
    /// Create a new `Date` from a `chrono` object.
    pub fn new(date: NaiveDate) -> Self {
        Self { date }
    }

    /// Get the year component of the date.
    pub fn year(&self) -> i32 {
        self.date.year()
    }

    /// Get the month component of the date.
    pub fn month(&self) -> u32 {
        self.date.month()
    }

    /// Get the day component of the date.
    pub fn day(&self) -> u32 {
        self.date.day()
    }
}

impl AsRef<NaiveDate> for Date {
    fn as_ref(&self) -> &NaiveDate {
        &self.date
    }
}

impl AsMut<NaiveDate> for Date {
    fn as_mut(&mut self) -> &mut NaiveDate {
        &mut self.date
    }
}

impl Deref for Date {
    type Target = NaiveDate;
    fn deref(&self) -> &NaiveDate {
        &self.date
    }
}

impl DerefMut for Date {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.date
    }
}

impl Default for Date {
    fn default() -> Self {
        Local::now().date_naive().into()
    }
}

impl From<NaiveDate> for Date {
    fn from(date: NaiveDate) -> Self {
        Self::new(date)
    }
}

impl From<Date> for NaiveDate {
    fn from(date: Date) -> Self {
        date.date
    }
}

impl FromStr for Date {
    type Err = ParseError;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        const FORMATS: &[&'static str] = &["%Y-%m-%d", "%Y-%m-%d%Z", "%Y-%m-%d%:z"];
        for (i, fmt) in FORMATS.iter().enumerate() {
            match NaiveDate::parse_from_str(s, fmt) {
                Ok(dt) => return Ok(Date::new(dt)),
                Err(e) if i == FORMATS.len() - 1 => return Err(e),
                Err(_) => (),
            }
        }
        unreachable!()
    }
}

#[cfg(test)]
mod tests {

    use super::*;
    // use chrono::DateLike;

    #[test]
    fn test_from_str() {
        let date = Date::from_str("2012-12-25").unwrap();
        assert_eq!(date.year(), 2012);
        assert_eq!(date.month(), 12);
        assert_eq!(date.day(), 25);
    }

    #[test]
    fn test_datetime_from_str() {
        let date = Date::from_str("2012-12-25").unwrap();
        assert_eq!(date.year(), 2012);
        assert_eq!(date.month(), 12);
        assert_eq!(date.day(), 25);
    }
}