public void ShouldReturn7Moves()
{
//Arrange
var game = FakeTowerGameDataBuilder.CreateWithRandomProps().WithMaxDiscsPerPeg(3).Build();
var sut = CreateSut();
//Act
var actual = sut.SolveFromStart(game).ToArray();
//Assert
actual.Should().HaveCount(7);
}
public void GivenTowerWithMoreThan3Discs_Throws()
{
//Arrange
var game = FakeTowerGameDataBuilder.CreateWithRandomProps().WithMaxDiscsPerPeg(4).Build();
var sut = CreateSut();
//Act
Action action = () => sut.SolveFromStart(game).ToArray();
//Assert
action.Should().Throw <NotSupportedException>()
.WithMessage("I'm a SIMPLE solver, I can only solve towers that have 3 discs");
}
public void GivenGameNotAtStart_Throws()
{
//Arrange
var game = FakeTowerGameDataBuilder.CreateWithRandomProps().WithTouchedGame().Build();
var sut = CreateSut();
//Act
Action action = () => sut.SolveFromStart(game).ToArray();
//Assert
action.Should().Throw <NotSupportedException>()
.WithMessage("This solver can only solve games from the start");
}
public void ShouldReturnOptimalAmountOfMoves()
{
//Arrange
var discsPerPeg = RandomTower.Peg.MaxDiscs;
var expectedMoves = Convert.ToInt32(Math.Pow(2, discsPerPeg) - 1);
var game = FakeTowerGameDataBuilder
.CreateWithRandomProps()
.WithMaxDiscsPerPeg(discsPerPeg)
.WithUntouchedGame()
.Build();
var sut = CreateSut();
//Act
var actual = sut.SolveFromStart(game).ToArray();
//Assert
actual.Should().HaveCount(expectedMoves);
}
