// use thanatos::geometry::{Circle, Difference, Point, Rectangle, translate};
// use thanatos::geometry::{BoundingBox, Frep, Primitive};

// mod test_difference {
//   use super::*;

//   #[test]
//   fn test_bounding_box() {
//     let r = Rectangle::new(1., 1.);
//     let c = Circle::new(0.25);
//     let t = translate(c, Point::new(0.5, 0.5, 0.0));
//     let left = r;
//     let mut right: Vec<Box<dyn Primitive>> = Vec::new();
//     right.push(Box::new(t));
//     let d = Difference::new(left, right);
//     let bb = d.bounding_box();
//     assert_eq!(bb.origin, Point::new(0., 0., 0.));
//     assert_eq!(bb.widths, Point::new(1., 1., 0.));
//   }

//   #[test]
//   fn test_inside_geometry() {
//     let r = Rectangle::new(1., 1.);
//     let c = Circle::new(0.25);
//     let t = translate(c, Point::new(0.5, 0.5, 0.0));
//     let left = r;
//     let mut right: Vec<Box<dyn Primitive>> = Vec::new();
//     right.push(Box::new(t));
//     let d = Difference::new(left, right);
//     let v = Point::new(0.25, 0.25, 0.);
//     assert!(d.frep(&v) < 0.);
//   }

//   #[test]
//   fn test_on_boundary() {
//     let r = Rectangle::new(1., 1.);
//     let c = Circle::new(0.25);
//     let t = translate(c, Point::new(0.5, 0.5, 0.0));
//     let left = r;
//     let mut right: Vec<Box<dyn Primitive>> = Vec::new();
//     right.push(Box::new(t));
//     let d = Difference::new(left, right);
//     let v = Point::new(0.5, 0.25, 0.);
//     assert_eq!(d.frep(&v), 0.);
//   }

//   #[test]
//   fn test_outside_geometry() {
//     let r = Rectangle::new(1., 1.);
//     let c = Circle::new(0.25);
//     let t = translate(c, Point::new(0.5, 0.5, 0.0));
//     let left = r;
//     let mut right: Vec<Box<dyn Primitive>> = Vec::new();
//     right.push(Box::new(t));
//     let d = Difference::new(left, right);
//     let v = Point::new(5.25, 0.25, 0.);
//     assert!(d.frep(&v) > 0.);
//   }
// }