public void ExtractCombinationsOfThreeElementsFromFive()
{
var generator = new CombinationGenerator();
var combinations = generator.GetCombinations(new List<string> { "A", "B", "C", "D", "E" }, 3).ToList();
Assert.AreEqual(10, combinations.Count(), "Ten ways to do this");
// ABC
// ABD
// ABE
// ACD
// ACE
// ADE
// BCD
// BCE
// BDE
// CDE
var list = combinations.Select(combination => string.Concat(combination)).ToList();
Assert.IsTrue(list.Contains("ABC"));
Assert.IsTrue(list.Contains("ABD"));
Assert.IsTrue(list.Contains("ABE"));
Assert.IsTrue(list.Contains("ACD"));
Assert.IsTrue(list.Contains("ACE"));
Assert.IsTrue(list.Contains("ADE"));
Assert.IsTrue(list.Contains("BCD"));
Assert.IsTrue(list.Contains("BCE"));
Assert.IsTrue(list.Contains("BDE"));
Assert.IsTrue(list.Contains("CDE"));
}
