public void TestInvalidValidation()
{
Assert.IsFalse(TagRegistry.ValidateTag("de-419-DE")); //two region tags
Assert.IsFalse(TagRegistry.ValidateTag("a-DE")); //(use of a single-character subtag in primary position; note
//that there are a few grandfathered tags that start with "i-" that are valid
Assert.IsFalse(TagRegistry.ValidateTag("ar-a-aaa-b-bbb-a-ccc")); //two extensions with same single-letter prefix
}
public void TestPrivateUseValidation()
{
LanguageTag result = null;
Assert.IsTrue(TagRegistry.TryParse("x-a", out result));
Assert.AreEqual("x-a", result.Value, ignoreCase);
Assert.IsTrue(TagRegistry.TryParse("x-aaaaaaaa", out result));
Assert.AreEqual("x-aaaaaaaa", result.Value, ignoreCase);
Assert.IsFalse(TagRegistry.ValidateTag("x-aaaaaaaaa"));
Assert.IsFalse(TagRegistry.ValidateTag("xaaaaaaaa"));
}
