public void FromRandomMoves2ExceptionTest()
{
Random random = new Random(7777777);
int length = 50;
double[] probabilities = Enumerable
.Repeat(1d, 18)
.ToArray();
Assert.ThrowsException <ArgumentOutOfRangeException>(() => Alg.FromRandomMoves(-1, random, probabilities));
Assert.ThrowsException <ArgumentNullException>(() => Alg.FromRandomMoves(length, null, probabilities));
Assert.ThrowsException <ArgumentNullException>(() => Alg.FromRandomMoves(length, random, null));
//negative probability value
probabilities[7] = -1;
Assert.ThrowsException <ArgumentException>(() => Alg.FromRandomMoves(length, random, probabilities));
//all probability values zero
probabilities = Enumerable
.Repeat(0d, 18)
.ToArray();
Alg lengthZero = Alg.FromRandomMoves(0, random, probabilities);
Assert.AreEqual(0, lengthZero.Length);
Assert.ThrowsException <ArgumentException>(() => Alg.FromRandomMoves(1, random, probabilities));
//one probability value non-zero
probabilities[7] = 1d;
Alg lengthOne = Alg.FromRandomMoves(1, random, probabilities);
Assert.AreEqual(Alg.FromString("F2"), lengthOne);
Assert.ThrowsException <ArgumentException>(() => Alg.FromRandomMoves(2, random, probabilities));
//two probability values non-zero
probabilities[8] = 1d;
Assert.ThrowsException <ArgumentException>(() => Alg.FromRandomMoves(2, random, probabilities));
probabilities[8] = 0d;
probabilities[15] = 1d;
Alg lengthTwo = Alg.FromRandomMoves(2, random, probabilities);
CollectionAssert.AreEquivalent(Alg.FromString("F2 B").ToArray(), lengthTwo.ToArray());
Assert.ThrowsException <ArgumentException>(() => Alg.FromRandomMoves(3, random, probabilities));
//three probability values non-zero
probabilities[8] = 1d;
Assert.ThrowsException <ArgumentException>(() => Alg.FromRandomMoves(3, random, probabilities));
probabilities[8] = 0d;
probabilities[0] = 1d;
Alg lengthThree = Alg.FromRandomMoves(3, random, probabilities);
Assert.IsTrue(lengthThree.Contains(Move.R1));
}