correction test

src/main/java/fr/nancy/iut/Sphere.java

@@ -28,7 +28,7 @@ public class Sphere {
   // Methods
   // ***********************************************************************
   public double computeVolume() {
-    return 4 * Math.PI * Math.pow(radius_, 2) / 2;
+    return 4 * Math.PI * Math.pow(radius_, 3) / 3;
   }
 
   public double distanceTo(Sphere other) {