public void UnitMc_GetRows()
{
var expect = new int[][]
{
new int[] { 0, 0, 0, 0 }, new int[] { 0, 0, 0, 1 }, new int[] { 0, 0, 0, 2 },
new int[] { 0, 0, 1, 1 }, new int[] { 0, 0, 1, 2 }, new int[] { 0, 0, 2, 2 },
new int[] { 0, 1, 1, 1 }, new int[] { 0, 1, 1, 2 }, new int[] { 0, 1, 2, 2 },
new int[] { 0, 2, 2, 2 }, new int[] { 1, 1, 1, 1 }, new int[] { 1, 1, 1, 2 },
new int[] { 1, 1, 2, 2 }, new int[] { 1, 2, 2, 2 }, new int[] { 2, 2, 2, 2 }
};
long startRank = 2;
var mc0 = new Multicombination(3, 4, startRank);
Assert.AreEqual(expect.Length, mc0.RowCount);
var beginData = new int[4];
mc0.CopyTo(beginData);
int actualCount = 0;
foreach (Multicombination mc in mc0.GetRows())
{
long expectRank = (actualCount + startRank) % expect.Length;
Assert.AreEqual(expectRank, mc.Rank);
Assert.AreEqual(expectRank, mc0.Rank);
Assert.IsTrue(Enumerable.SequenceEqual(expect[expectRank], mc));
Assert.IsTrue(Enumerable.SequenceEqual(mc, mc0));
++actualCount;
}
Assert.AreEqual(expect.Length, actualCount);
Assert.AreEqual(startRank, mc0.Rank);
Assert.IsTrue(Enumerable.SequenceEqual(beginData, mc0));
}
public void UnitMc_GetRows0Empty()
{
Multicombination mc = new Multicombination();
foreach (Multicombination row in mc.GetRows())
{
Assert.Fail("Empty multicombo iterates");
}
}
static void Main()
{
var mc = new Multicombination(choices: 4, picks: 3);
Console.WriteLine($"n={mc.Choices}, k={mc.Picks}:\n");
foreach (var row in mc.GetRows())
{
Console.WriteLine($"{row.Rank,2}: {row}");
}
}
