Adding .idea to .gitignore

.gitignore

 target
 .DS_Store
 .vscode
+.idea

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

@@ -7,9 +7,9 @@ import javax.vecmath.Point3d;
 /**
  * Created by dparsons on 12/08/15.
  */
-public class SphereTest {
+class SphereTest {
   @Test
-  public void testComputeVolume() throws Exception {
+   void testComputeVolume() throws Exception {
     Sphere mySphere = new Sphere(1.5);
     assertEquals(14.137166941154069, mySphere.computeVolume(), 0.0);
   }