public void ItemEnumeration()
{
OrderedDictionary<string, string> dictionary = new OrderedDictionary<string, string>();
List<KeyValuePair<string, string>> tracking = new List<KeyValuePair<string, string>>();
KeyValuePair<string, string> one = new KeyValuePair<string, string>("1", "one");
KeyValuePair<string, string> two = new KeyValuePair<string, string>("2", "two");
int i = 0;
{ // round 1
dictionary.Add(one);
dictionary.Insert(0, two);
// test implicit pairs order
foreach (KeyValuePair<string, string> item in dictionary)
{
switch (i)
{
case 0:
Assert.AreEqual("2", dictionary[i].Key);
break;
case 1:
Assert.AreEqual("1", dictionary[i].Key);
break;
default:
Assert.Fail("unexpected element");
break;
}
++i;
}
// test explicit pairs order
i = 0;
foreach (KeyValuePair<string, string> item in dictionary.GetOrderedPairs())
{
switch (i)
{
case 0:
Assert.AreEqual("2", dictionary[i].Key);
break;
case 1:
Assert.AreEqual("1", dictionary[i].Key);
break;
default:
Assert.Fail("unexpected element");
break;
}
++i;
}
// test keys order
i = 0;
foreach (string key in dictionary.GetOrderedKeys())
{
switch (i)
{
case 0:
Assert.AreEqual("2", key);
break;
case 1:
Assert.AreEqual("1", key);
break;
default:
Assert.Fail("unexpected element");
break;
}
++i;
}
// test values order
i = 0;
foreach (string key in dictionary.GetOrderedValues())
{
switch (i)
{
case 0:
Assert.AreEqual("two", key);
break;
case 1:
Assert.AreEqual("one", key);
break;
default:
Assert.Fail("unexpected element");
break;
}
++i;
}
}
dictionary.Clear();
Assert.AreEqual(0, dictionary.Count);
i = 0;
{ // round 2
dictionary.Add(one);
dictionary.Add(two);
foreach (KeyValuePair<string, string> item in dictionary)
{
switch (i)
{
case 0:
Assert.AreEqual("1", dictionary[i].Key);
break;
case 1:
Assert.AreEqual("2", dictionary[i].Key);
break;
default:
Assert.Fail("unexpected element");
break;
}
++i;
}
}
}