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use derive_more::{Add, Constructor, From, Sub};
use std::ops::Div;
#[derive(Constructor, Add, Sub, Copy, From, Clone, Default, Debug, PartialEq)]
pub struct Size {
width: f64,
height: f64,
}
impl Size {
pub fn width(&self) -> f64 {
self.width
}
pub fn set_width(&mut self, width: f64) {
self.width = width;
}
pub fn height(&self) -> f64 {
self.height
}
pub fn set_height(&mut self, height: f64) {
self.height = height;
}
}
impl Div<f64> for Size {
type Output = Size;
fn div(mut self, rhs: f64) -> Self::Output {
self.width /= rhs;
self.height /= rhs;
self
}
}
impl Div<Size> for f64 {
type Output = Size;
fn div(self, mut rhs: Size) -> Self::Output {
rhs.width /= self;
rhs.height /= self;
rhs
}
}
impl From<f64> for Size {
fn from(t: f64) -> Self {
Size::new(t, t)
}
}
impl From<i32> for Size {
fn from(t: i32) -> Self {
Size::new(t as f64, t as f64)
}
}
impl From<(i32, i32)> for Size {
fn from(s: (i32, i32)) -> Size {
Size::from((s.0 as f64, s.1 as f64))
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_sub() {
let expected_result = Size::new(-3., 5.);
const ERROR_MARGIN: f64 = 0.00001;
let left_side = Size::new(5., 7.);
let right_side = Size::new(8., 2.);
let result = left_side - right_side;
assert!((result.width() - expected_result.width()).abs() < ERROR_MARGIN);
assert!((result.height() - expected_result.height()).abs() < ERROR_MARGIN);
}
#[test]
fn test_add() {
let expected_result = Size::new(13., 9.);
const ERROR_MARGIN: f64 = 0.00001;
let left_side = Size::new(5., 7.);
let right_side = Size::new(8., 2.);
let result = left_side + right_side;
assert!((result.width() - expected_result.width()).abs() < ERROR_MARGIN);
assert!((result.height() - expected_result.height()).abs() < ERROR_MARGIN);
}
}