public void TestAllD4Values() { // create D4 var d = DiceFactory.CreateD4(); // populate "not yet found" list List <int> notFound = new List <int>(); notFound.AddRange(new int[] { 1, 2, 3, 4 }); // attempt to find each value for (int i = 1; i < 100; i++) // arbitrary limit of 10 maximum tries { int result = d.Roll(); // 1 To 2 notFound.Remove(result); if (notFound.Count <= 0) { break; // all found } } // test Assert.AreEqual <int>(0, notFound.Count, "Some values were not rolled on a d4."); }