correction test

src/test/java/fr/nancy/iut/SphereTest.java

@@ -14,4 +14,10 @@ public class SphereTest {
     assertEquals(14.137166941154069, mySphere.computeVolume(), 0.0);
   }
 
+  @Test
+  public void testDistanceSquaredTo() throws Exception {
+    Sphere mySphere = new Sphere(1.5);
+    Sphere otherSphere = new Sphere(1.5);
+    assertEquals(0.0, mySphere.distanceSquaredTo(otherSphere), 0.0);
+  }
 }
\ No newline at end of file