public void GetKeysTest()
{
var keyList = dict.GetKeys();
CollectionAssert.AreEqual(new List <object> {
key1, key2, key3
}, keyList);
}
public void RemoveFirstEmptyList()
{
OrderPreservingDictionary <object, int> dictEmpty = new OrderPreservingDictionary <object, int>();
dictEmpty.RemoveFirst();
var keyList = dictEmpty.GetKeys();
CollectionAssert.AreEqual(new List <object> {
}, keyList);
}