fix(84_Super_Star_Trek/rust): non-integer torpedo courses

84_Super_Star_Trek/rust/src/commands.rs

@@ -529,15 +529,39 @@ fn find_torpedo_path(start_sector: Pos, course: f32) -> Vec<Pos> {
     let mut last_sector = start_sector;
     let mut path = Vec::new();
 
+    let mut nx = last_sector.0 as f32;
+    let mut ny = last_sector.1 as f32;
+
     loop {
-        let nx = (last_sector.0 as f32 + dx) as i8;
-        let ny = (last_sector.1 as f32 + dy) as i8;
-        if nx < 0 || ny < 0 || nx >= 8 || ny >= 8 {
+        nx += dx;
+        ny += dy;
+        if nx < 0.0 || ny < 0.0 || nx >= 8.0 || ny >= 8.0 {
             break;
         }
-        last_sector = Pos(nx as u8, ny as u8);
-        path.push(last_sector);
+        let step = Pos(nx as u8, ny as u8);
+        if step != last_sector {
+            last_sector = step;
+            path.push(last_sector);
+        }
     }
-  
+
     path
-}
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_find_torpedo_path() {
+        let path = find_torpedo_path(Pos(0, 0), 7.5);
+        assert_eq!(
+            *path.last().unwrap(),
+            Pos(7, 3),
+        );
+        assert_eq!(
+            path,
+            vec!(Pos(1, 0), Pos(2, 1), Pos(3, 1), Pos(4, 2), Pos(5, 2), Pos(6, 3), Pos(7, 3))
+        );
+    }
+}