/**
* Turns stones on emoji in for evaluation and checks, if stones are cleared from playing field and if the sprite of the team changes
*
* @returns true if number of stones before and after turn in differs and when sprite of emoji changes after turn in
*/
public IEnumerator TurnInEmoji()
{
// before turn in
var sprite = Emoji.GetComponent <SpriteRenderer>().sprite;
var countStones = GameObject.FindGameObjectsWithTag("Stone").Count();
ButtonEmoji_1.GetComponent <Toggle>().isOn = true;
ButtonEmoji_2.GetComponent <Toggle>().isOn = true;
yield return(new WaitForSeconds(0.5f)); // wait for turn in to be processed
// after turn in
var spriteNew = Emoji.GetComponent <SpriteRenderer>().sprite;
var countStonesNew = GameObject.FindGameObjectsWithTag("Stone").Count();
Assert.AreNotEqual(spriteNew, sprite, $"Player {_currentPlayer}: Emoji sprite didn't change after turn in");
Assert.AreNotEqual(countStonesNew, countStones, $"Player {_currentPlayer}: expected stones to be cleared from Emoji after turn in");
}