add more asserts

fh.fd.ci.server/src/test/java/de/fd/fh/server/game/GameServiceTest.java

@@ -47,6 +47,14 @@ class GameServiceTest
 
         assertNotNull(captor.getValue());
 
+        final Game savedGame = captor.getValue();
+
+        assertNotNull(savedGame.getId());
+        assertEquals("12345", savedGame.getBlackPlayer().getIdentifier());
+        assertEquals("98765", savedGame.getWhitePlayer().getIdentifier());
+        assertEquals("98765", savedGame.getCurrentPlayer().getIdentifier());
+        assertEquals(64, savedGame.getFields().size());
+
         then(repository).should().save(any(Game.class));
         then(repository).shouldHaveNoMoreInteractions();
     }