[Test]
public void GetLanguage_GetLanguageFromPosting()
{
    using(CmsApplicationContext appCtx = new CmsApplicationContext())
    {
        appCtx.AuthenticateAsCurrentUser(PublishingMode.Update);

        try {
            Template templ = appCtx.Searches.GetByGuid("{8DD8B72A-31B7-495B-80F9-1319FAA78BF2}") as Template;
            Posting p = appCtx.RootChannel.CreatePosting(templ);
            CustomProperty prop = p.CustomProperties["language"];
            prop.Value = "est";
            Assert.AreEqual("est", NavigationHelper.GetLanguage(p));
        }
        finally {
            appCtx.RollbackAll();
        }
    }
}