public void FindBySecondKey_SouldFindAllValuesAddedByGivenSecondKey()
{
// arrange
var dic = new BiDictionary <int, string, string>();
// act
dic.Add(1, "two", "second");
dic.Add(2, "two", "third");
dic.Add(3, "two", "fourth");
dic.Add(3, "one", "fourth");
var actual = dic.FindAllBySecondKey("two");
// assert
Assert.AreEqual(3, actual.Count);
}
