public async Task GetUpcomingMatchesForUser_ShouldReturnEmptyList_WhenUserDoesNotExist()
{
// Arrange
_unitOfWorkMock.Setup(x => x.Users.GetUserByIdWithAdditionalInformation(It.IsAny <int>()))
.ReturnsAsync(() => null);
// Act
var result = await _sut.GetUpcomingMatchesForUser(It.IsAny <int>());
// Assert
Assert.Equal(0, result.Count);
}
