public void TryAddReverseBijectionTest()
{
var bijective = new Bijective <string, int>();
bijective[10] = "A";
Assert.IsFalse(bijective.TryAddReverseBijection(10, "A"));
Assert.IsFalse(bijective.TryAddReverseBijection(10, "B"));
Assert.IsFalse(bijective.TryAddReverseBijection(20, "A"));
Assert.IsTrue(bijective.TryAddReverseBijection(20, "B"));
Assert.IsTrue(bijective.LeftElementExists("B"));
Assert.IsTrue(bijective.RightElementExists(20));
var allLeftElementsList = new List <string>(bijective.GetAllLeftElements());
Assert.AreEqual(2, allLeftElementsList.Count);
Assert.IsTrue(allLeftElementsList.Contains("B"));
var allRightElementsList = new List <int>(bijective.GetAllRightElements());
Assert.AreEqual(2, allRightElementsList.Count);
Assert.IsTrue(allRightElementsList.Contains(20));
Assert.IsFalse(bijective.CanAddBijection("B", 20));
Assert.IsFalse(bijective.CanAddReverseBijection(20, "B"));
Tuple <string, int> bijection;
Assert.IsTrue(bijective.TryGetBijection("B", out bijection));
Assert.AreEqual("B", bijection.Item1);
Assert.AreEqual(20, bijection.Item2);
Tuple <int, string> reverseBijection;
Assert.IsTrue(bijective.TryGetReverseBijection(20, out reverseBijection));
Assert.AreEqual(20, reverseBijection.Item1);
Assert.AreEqual("B", reverseBijection.Item2);
var allBijectionsList = new List <Tuple <string, int> >(bijective.GetAllBijections());
Assert.AreEqual(2, allBijectionsList.Count);
Assert.IsTrue(allBijectionsList.Select(b => b.Item1).Contains("B"));
Assert.IsTrue(allBijectionsList.Select(b => b.Item2).Contains(20));
var allReverseBijectionsList = new List <Tuple <int, string> >(bijective.GetAllReverseBijections());
Assert.AreEqual(2, allReverseBijectionsList.Count);
Assert.IsTrue(allReverseBijectionsList.Select(b => b.Item1).Contains(20));
Assert.IsTrue(allReverseBijectionsList.Select(b => b.Item2).Contains("B"));
}