public void AddingAValidDisplayName()
{
EnumExtensions.ClearDisplayNames <TestEnum>();
string displayName = "The First";
TestEnum.TheFirst.AddDisplayName(displayName);
Assert.AreEqual(TestEnum.TheFirst.GetDisplayName(), displayName);
}
public void AddingADuplicateDisplayName()
{
EnumExtensions.ClearDisplayNames <TestEnum>();
string displayName = "The First";
TestEnum.TheFirst.AddDisplayName(displayName);
string expectedMessage = string.Format("Enum value '{0}' already has a display name registered", TestEnum.TheFirst.ToString());
Assert.AreEqual(ExceptionMessage(() => TestEnum.TheFirst.AddDisplayName(displayName)), expectedMessage);
}