public async Task ChechInForMatch_ShouldNotCheckInWhenMatchDoesNotExist()
{
// Arrange
var responseMessage = "Specified match doesn't exist!";
_unitOfWorkMock.Setup(x => x.Matchdays.GetById(It.IsAny <int>()))
.ReturnsAsync(() => null);
// Act
var response = await _sut.CheckInForMatch(It.IsAny <int>(), It.IsAny <int>());
// Assert
Assert.Equal(responseMessage, response.Value);
}