public void AddRemoveElement()
{
var dictionary = new Dictionary <int, string>()
{
{ 1, "one" },
{ 2, "two" },
{ 3, "three" }
};
var(hitAdd, hitRemove) = (false, false);
var forwarderDictionary = new DictionaryAdapter <int, string>(
(int key, out string value) => dictionary.TryGetValue(key, out value),
() => dictionary.Keys,
(key, value) => { hitAdd = true; dictionary[key] = value; },
(key) => { hitRemove = true; return(dictionary.Remove(key)); });
Assert.False(hitAdd);
Assert.False(hitRemove);
forwarderDictionary.Add(4, "four");
Assert.Equal(dictionary, forwarderDictionary);
Assert.True(hitAdd);
Assert.False(hitRemove);
(hitAdd, hitRemove) = (false, false);
forwarderDictionary.Remove(3);
Assert.Equal(dictionary, forwarderDictionary);
Assert.False(hitAdd);
Assert.True(hitRemove);
}
