even further stuff

Co-Authored-By: Talha Caliskan <killerber4t@users.noreply.github.com>
Co-Authored-By: tomvahl <tomvahl@users.noreply.github.com>
Co-Authored-By: xxnitram <xxnitram@users.noreply.github.com>
Co-Authored-By: kasch309 <kasch309@users.noreply.github.com>

src/test/java/mops/gruppen2/domain/event/DeleteUserEventTest.java

@@ -28,6 +28,8 @@ class DeleteUserEventTest {
 
         event.apply(group);
 
+        assertThat(group.getMembers().size()).isEqualTo(1);
         assertThat(group.getRoles().size()).isEqualTo(1);
+
     }
 }