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20221228 add one more point to the polygon

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Der Chien 2022-12-28 21:49:01 +08:00 committed by GitHub
parent dcf29d4653
commit 42494f95ab
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1 changed files with 4 additions and 3 deletions
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7
src/exercises/day-2/points-polygons.rs
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@ -84,8 +84,8 @@ impl Polygon {
}
pub fn length(&self) -> f64 {
if self.points.is_empty() {
return 0.0;
if self.points.len() < 3 {
return f64::NAN;
}
let mut result = 0.0;
@ -207,6 +207,7 @@ mod tests {
fn test_shape_circumferences() {
let mut poly = Polygon::new();
poly.add_point(Point::new(12, 13));
poly.add_point(Point::new(17, 11));
poly.add_point(Point::new(16, 16));
let shapes = vec![
Shape::from(poly),
@ -217,7 +218,7 @@ mod tests {
.map(Shape::circumference)
.map(round_two_digits)
.collect::<Vec<_>>();
assert_eq!(circumferences, vec![10.0, 31.42]);
assert_eq!(circumferences, vec![15.48, 31.42]);
}
}
// ANCHOR_END: unit-tests