public void Works_with_3_items_and_k_0()
 {
     var variations = new VariationsWithoutRepetitions<string>(new[] { "a", "b", "c" }, 0);
     GenerateOutput(variations);
     AreEqual(GetExpectedTestOutput(), GetActualTestOutput());
 }
 public void Works_with_no_items_and_k_0()
 {
     var variations = new VariationsWithoutRepetitions<string>(Enumerable.Empty<string>(), 0);
     GenerateOutput(variations);
     AreEqual(GetExpectedTestOutput(), GetActualTestOutput());
 }