public void TestGetValueOrDefault()
{
// Ensure that requesting an invalid key with no default specified returns the default
// value for that type.
Assert.AreEqual(0L, CollectionUtilities.GetValueOrDefault(dictionary, invalidKey));
long validValue = dictionary[validKey];
// Ensure requesting a valid key returns the expected value.
Assert.AreEqual(validValue, CollectionUtilities.GetValueOrDefault(dictionary, validKey));
// Ensure requesting an invalid key with a default specified returns the specified default.
Assert.AreEqual(validValue,
CollectionUtilities.GetValueOrDefault(dictionary, invalidKey, validValue));
}