public void RemoveWrongPossibiliti()
{
var actual = new FieldsContainer();
for (int i = 0; i < 9; i++)
{
actual.Fields.Add(new Field());
}
var expected = new List <int>()
{
1, 2, 3, 4, 5, 6, 7, 8, 9
};
actual.ClearPossibilities(400);
CollectionAssert.AreEqual(expected, actual.Fields[4].PossibleValues);
}