public class AlphameticsTests { [Fact] public void Puzzle_with_three_letters() { var actual = Alphametics.Solve("I + BB == ILL"); var expected = new Dictionary { ['I'] = 1, ['B'] = 9, ['L'] = 0 }; Assert.Equal(expected, actual); } [Fact(Skip = "Remove this Skip property to run this test")] public void Solution_must_have_unique_value_for_each_letter() { Assert.Throws(() => Alphametics.Solve("A == B")); } [Fact(Skip = "Remove this Skip property to run this test")] public void Leading_zero_solution_is_invalid() { Assert.Throws(() => Alphametics.Solve("ACA + DD == BD")); } [Fact(Skip = "Remove this Skip property to run this test")] public void Puzzle_with_two_digits_final_carry() { var actual = Alphametics.Solve("A + A + A + A + A + A + A + A + A + A + A + B == BCC"); var expected = new Dictionary { ['A'] = 9, ['B'] = 1, ['C'] = 0 }; Assert.Equal(expected, actual); } [Fact(Skip = "Remove this Skip property to run this test")] public void Puzzle_with_four_letters() { var actual = Alphametics.Solve("AS + A == MOM"); var expected = new Dictionary { ['A'] = 9, ['S'] = 2, ['M'] = 1, ['O'] = 0 }; Assert.Equal(expected, actual); } [Fact(Skip = "Remove this Skip property to run this test")] public void Puzzle_with_six_letters() { var actual = Alphametics.Solve("NO + NO + TOO == LATE"); var expected = new Dictionary { ['N'] = 7, ['O'] = 4, ['T'] = 9, ['L'] = 1, ['A'] = 0, ['E'] = 2 }; Assert.Equal(expected, actual); } [Fact(Skip = "Remove this Skip property to run this test")] public void Puzzle_with_seven_letters() { var actual = Alphametics.Solve("HE + SEES + THE == LIGHT"); var expected = new Dictionary { ['E'] = 4, ['G'] = 2, ['H'] = 5, ['I'] = 0, ['L'] = 1, ['S'] = 9, ['T'] = 7 }; Assert.Equal(expected, actual); } [Fact(Skip = "Remove this Skip property to run this test")] public void Puzzle_with_eight_letters() { var actual = Alphametics.Solve("SEND + MORE == MONEY"); var expected = new Dictionary { ['S'] = 9, ['E'] = 5, ['N'] = 6, ['D'] = 7, ['M'] = 1, ['O'] = 0, ['R'] = 8, ['Y'] = 2 }; Assert.Equal(expected, actual); } [Fact(Skip = "Remove this Skip property to run this test")] public void Puzzle_with_ten_letters() { var actual = Alphametics.Solve("AND + A + STRONG + OFFENSE + AS + A + GOOD == DEFENSE"); var expected = new Dictionary { ['A'] = 5, ['D'] = 3, ['E'] = 4, ['F'] = 7, ['G'] = 8, ['N'] = 0, ['O'] = 2, ['R'] = 1, ['S'] = 6, ['T'] = 9 }; Assert.Equal(expected, actual); } [Fact(Skip = "Remove this Skip property to run this test")] public void Puzzle_with_ten_letters_and_199_addends() { var actual = Alphametics.Solve("THIS + A + FIRE + THEREFORE + FOR + ALL + HISTORIES + I + TELL + A + TALE + THAT + FALSIFIES + ITS + TITLE + TIS + A + LIE + THE + TALE + OF + THE + LAST + FIRE + HORSES + LATE + AFTER + THE + FIRST + FATHERS + FORESEE + THE + HORRORS + THE + LAST + FREE + TROLL + TERRIFIES + THE + HORSES + OF + FIRE + THE + TROLL + RESTS + AT + THE + HOLE + OF + LOSSES + IT + IS + THERE + THAT + SHE + STORES + ROLES + OF + LEATHERS + AFTER + SHE + SATISFIES + HER + HATE + OFF + THOSE + FEARS + A + TASTE + RISES + AS + SHE + HEARS + THE + LEAST + FAR + HORSE + THOSE + FAST + HORSES + THAT + FIRST + HEAR + THE + TROLL + FLEE + OFF + TO + THE + FOREST + THE + HORSES + THAT + ALERTS + RAISE + THE + STARES + OF + THE + OTHERS + AS + THE + TROLL + ASSAILS + AT + THE + TOTAL + SHIFT + HER + TEETH + TEAR + HOOF + OFF + TORSO + AS + THE + LAST + HORSE + FORFEITS + ITS + LIFE + THE + FIRST + FATHERS + HEAR + OF + THE + HORRORS + THEIR + FEARS + THAT + THE + FIRES + FOR + THEIR + FEASTS + ARREST + AS + THE + FIRST + FATHERS + RESETTLE + THE + LAST + OF + THE + FIRE + HORSES + THE + LAST + TROLL + HARASSES + THE + FOREST + HEART + FREE + AT + LAST + OF + THE + LAST + TROLL + ALL + OFFER + THEIR + FIRE + HEAT + TO + THE + ASSISTERS + FAR + OFF + THE + TROLL + FASTS + ITS + LIFE + SHORTER + AS + STARS + RISE + THE + HORSES + REST + SAFE + AFTER + ALL + SHARE + HOT + FISH + AS + THEIR + AFFILIATES + TAILOR + A + ROOFS + FOR + THEIR + SAFE == FORTRESSES"); var expected = new Dictionary { ['A'] = 1, ['E'] = 0, ['F'] = 5, ['H'] = 8, ['I'] = 7, ['L'] = 2, ['O'] = 6, ['R'] = 3, ['S'] = 4, ['T'] = 9 }; Assert.Equal(expected, actual); } }