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use std::{fmt::Display, str::FromStr};
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
#[derive(Debug, PartialEq, Clone, Copy, Default, Hash, Eq, Ord, PartialOrd)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub enum Frame {
#[cfg_attr(feature = "serde", serde(rename = "."))]
#[default]
None,
#[cfg_attr(feature = "serde", serde(rename = "0"))]
Zero,
#[cfg_attr(feature = "serde", serde(rename = "1"))]
One,
#[cfg_attr(feature = "serde", serde(rename = "2"))]
Two,
}
impl FromStr for Frame {
type Err = &'static str;
/// Convert a string to a Frame
///
/// # Arguments
/// * `s` - A string slice to convert to a Frame
///
/// # Example
///
/// ```
/// use bedrs::Frame;
/// use std::str::FromStr;
///
/// assert_eq!(Frame::from_str("0").unwrap(), Frame::Zero);
/// assert_eq!(Frame::from_str("1").unwrap(), Frame::One);
/// assert_eq!(Frame::from_str("2").unwrap(), Frame::Two);
/// assert_eq!(Frame::from_str(".").unwrap(), Frame::None);
/// assert!(Frame::from_str("a").is_err());
/// ```
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"0" => Ok(Frame::Zero),
"1" => Ok(Frame::One),
"2" => Ok(Frame::Two),
"." => Ok(Frame::None),
_ => Err("Frame must be either 0, 1, 2 or ."),
}
}
}
impl From<char> for Frame {
/// Convert a char to a Frame
///
/// # Arguments
/// * `c` - A char to convert to a Frame
///
/// # Example
///
/// ```
/// use bedrs::Frame;
/// use std::convert::TryFrom;
///
/// assert_eq!(Frame::from('0'), Frame::Zero);
/// assert_eq!(Frame::from('1'), Frame::One);
/// assert_eq!(Frame::from('2'), Frame::Two);
/// assert_eq!(Frame::from('.'), Frame::None);
///
/// ```
fn from(c: char) -> Self {
match c {
'0' => Frame::Zero,
'1' => Frame::One,
'2' => Frame::Two,
_ => Frame::None,
}
}
}
impl From<i32> for Frame {
/// Convert an i32 to a Frame
///
/// # Arguments
/// * `i` - An i32 to convert to a Frame
///
/// # Example
///
/// ```
/// use bedrs::Frame;
///
/// assert_eq!(Frame::from(0), Frame::Zero);
/// assert_eq!(Frame::from(1), Frame::One);
/// assert_eq!(Frame::from(2), Frame::Two);
/// assert_eq!(Frame::from(3), Frame::None);
///
/// ```
fn from(i: i32) -> Self {
match i {
0 => Frame::Zero,
1 => Frame::One,
2 => Frame::Two,
_ => Frame::None,
}
}
}
impl From<usize> for Frame {
/// Convert a usize to a Frame
///
/// # Arguments
/// * `i` - A usize to convert to a Frame
///
/// # Example
///
/// ```
/// use bedrs::Frame;
///
/// assert_eq!(Frame::from(0), Frame::Zero);
/// assert_eq!(Frame::from(1), Frame::One);
/// assert_eq!(Frame::from(2), Frame::Two);
/// assert_eq!(Frame::from(3), Frame::None);
///
/// ```
fn from(i: usize) -> Self {
match i {
0 => Frame::Zero,
1 => Frame::One,
2 => Frame::Two,
_ => Frame::None,
}
}
}
impl From<Option<i32>> for Frame {
/// Convert an `Option<i32>`to a Frame
///
/// # Arguments
/// * `i` - An `Option<i32>` to convert to a Frame
///
/// # Example
///
/// ```
/// use bedrs::Frame;
///
/// assert_eq!(Frame::from(Some(0)), Frame::Zero);
/// assert_eq!(Frame::from(Some(1)), Frame::One);
/// assert_eq!(Frame::from(Some(2)), Frame::Two);
/// assert_eq!(Frame::from(None), Frame::None);
///
/// ```
fn from(i: Option<i32>) -> Self {
match i {
Some(0) => Frame::Zero,
Some(1) => Frame::One,
Some(2) => Frame::Two,
_ => Frame::None,
}
}
}
impl Display for Frame {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Frame::Zero => write!(f, "0"),
Frame::One => write!(f, "1"),
Frame::Two => write!(f, "2"),
Frame::None => write!(f, "."),
}
}
}
#[cfg(test)]
mod testing {
use super::*;
#[test]
fn test_frame() {
assert_eq!(Frame::Zero, Frame::Zero);
assert_eq!(Frame::One, Frame::One);
assert_eq!(Frame::Two, Frame::Two);
assert_eq!(Frame::None, Frame::None);
}
#[test]
fn test_frame_default() {
assert_eq!(Frame::default(), Frame::None);
}
#[test]
fn test_frame_from_str() {
assert_eq!(Frame::from_str("0").unwrap(), Frame::Zero);
assert_eq!(Frame::from_str("1").unwrap(), Frame::One);
assert_eq!(Frame::from_str("2").unwrap(), Frame::Two);
assert_eq!(Frame::from_str(".").unwrap(), Frame::None);
assert!(Frame::from_str("a").is_err());
}
#[test]
fn test_frame_from_char() {
assert_eq!(Frame::from('0'), Frame::Zero);
assert_eq!(Frame::from('1'), Frame::One);
assert_eq!(Frame::from('2'), Frame::Two);
assert_eq!(Frame::from('.'), Frame::None);
assert_eq!(Frame::from('a'), Frame::None);
}
#[test]
fn test_frame_from_i32() {
assert_eq!(Frame::from(0), Frame::Zero);
assert_eq!(Frame::from(1), Frame::One);
assert_eq!(Frame::from(2), Frame::Two);
assert_eq!(Frame::from(3), Frame::None);
}
#[test]
fn test_frame_from_usize() {
assert_eq!(Frame::from(0), Frame::Zero);
assert_eq!(Frame::from(1), Frame::One);
assert_eq!(Frame::from(2), Frame::Two);
assert_eq!(Frame::from(3), Frame::None);
}
#[test]
fn test_frame_from_option_i32() {
assert_eq!(Frame::from(Some(0)), Frame::Zero);
assert_eq!(Frame::from(Some(1)), Frame::One);
assert_eq!(Frame::from(Some(2)), Frame::Two);
assert_eq!(Frame::from(None), Frame::None);
}
#[test]
fn test_frame_ordering() {
assert!(Frame::None < Frame::Zero);
assert!(Frame::Zero < Frame::One);
assert!(Frame::One < Frame::Two);
}
}
#[cfg(feature = "serde")]
#[cfg(test)]
mod serde_testing {
use super::*;
use csv::ReaderBuilder;
#[test]
fn test_csv_deserialization() {
let a = "0\n1\n2\n.\n";
let mut rdr = ReaderBuilder::new()
.has_headers(false)
.from_reader(a.as_bytes());
let mut iter = rdr.deserialize();
let f1: Frame = iter.next().unwrap().unwrap();
let f2: Frame = iter.next().unwrap().unwrap();
let f3: Frame = iter.next().unwrap().unwrap();
let f4: Frame = iter.next().unwrap().unwrap();
assert!(iter.next().is_none());
assert_eq!(f1, Frame::Zero);
assert_eq!(f2, Frame::One);
assert_eq!(f3, Frame::Two);
assert_eq!(f4, Frame::None);
}
#[test]
fn test_csv_serialization() {
let records = vec![Frame::Zero, Frame::One, Frame::Two, Frame::None];
let mut wtr = csv::Writer::from_writer(vec![]);
for r in records {
wtr.serialize(r).unwrap();
}
let result = String::from_utf8(wtr.into_inner().unwrap()).unwrap();
assert_eq!(result, "0\n1\n2\n.\n");
}
}