public void GameOver()
		{
			var field = new Field();
			field.Fill();
			var defaultGameOverChecker = new DefaultGameOverChecker();
			var isItOver = defaultGameOverChecker.IsItOver(field);
			Assert.IsTrue(isItOver);
		}
		public void GameNotOver()
		{
			var field = new Field();
			field.RandomizeField(Difficulty.Normal);
			var defaultGameOverChecker = new DefaultGameOverChecker();
			var isItOver = defaultGameOverChecker.IsItOver(field);
			Assert.IsFalse(isItOver);
		}