public void Empty()
{
var empty = new ExtensionSubtag();
Assert.IsTrue(empty.IsEmpty);
Assert.AreEqual("", empty.ToString());
Assert.That(empty.ToArray(), Is.Empty);
}
public void ToString(string[] subtags, string expected)
{
var ext = new ExtensionSubtag('a', subtags);
Assert.AreEqual(expected, ext.ToString());
}