public void SelectItemTest()
{
int[] weights = new[] { 2, 3, 5, 7 };
WeightedSelection <int> ws = new WeightedSelection <int>(
weights.ToList(),
i => i);
Assert.AreEqual(17, ws.TotalWeights);
CollectionAssert.AreEquivalent(weights, ws.Items);
CollectionAssert.AreEquivalent(new[] { 2, 5, 10, 17 }, ws.WeightCDF);
Assert.AreEqual(2, ws.SelectItem(1));
Assert.AreEqual(2, ws.SelectItem(2));
Assert.AreEqual(3, ws.SelectItem(3));
Assert.AreEqual(3, ws.SelectItem(4));
Assert.AreEqual(3, ws.SelectItem(5));
Assert.AreEqual(5, ws.SelectItem(6));
Assert.AreEqual(5, ws.SelectItem(7));
Assert.AreEqual(5, ws.SelectItem(8));
Assert.AreEqual(5, ws.SelectItem(9));
Assert.AreEqual(5, ws.SelectItem(10));
Assert.AreEqual(7, ws.SelectItem(11));
Assert.AreEqual(7, ws.SelectItem(12));
Assert.AreEqual(7, ws.SelectItem(13));
Assert.AreEqual(7, ws.SelectItem(14));
Assert.AreEqual(7, ws.SelectItem(15));
Assert.AreEqual(7, ws.SelectItem(16));
Assert.AreEqual(7, ws.SelectItem(17));
Assert.Catch <ArgumentOutOfRangeException>(() => ws.SelectItem(18));
}
