public void ShouldTellUsIfAnEmptySquareOnlyHasOnePotentialLeft()
{
// Given some cells, all of which are filled with actuals
// except the third, which is missing "3"
var cells = CreateCellsWithActuals(1, 2, 3, 4, 5, 6, 7, 8, 9);
cells[2].RequestToggleNumber(3);
// When we apply the rule to that group
var rule = new OnlyOnePotential();
var hint = rule.HelpWith(cells);
// Then the rule should return a hint that the 3rd cell can only be a 3.
Assert.AreEqual(hint.CellIds.First(), cells[2].Id);
Assert.AreEqual("This cell can only be a 3", hint.Text);
}
public void ShouldTellUsIfASquareHasOnlyOnePotentialLeft()
{
// Given some cells, the first of which has potentials 8 and 9
// and the second is an actual 9
var cells = CreateNineEmptyCellsInPlay();
cells[0].RequestToggleNumber(8);
cells[0].RequestToggleNumber(9);
cells[1].RequestToggleNumber(9);
// When we apply the rule to that group
var rule = new OnlyOnePotential();
var hint = rule.HelpWith(cells);
// Then the rule should return a hint that the 1st cell can be reduced to an 8.
Assert.AreEqual(hint.CellIds.First(), cells[0].Id);
Assert.AreEqual("This cell can only be a 8", hint.Text);
}
