public void MigrateData_TopicInTokPisinButNotEnglish_ChangesLangeToEnglish()
{
var bookDom = new HtmlDom(@"<html ><head></head><body>
<div id='bloomDataDiv'>
<div data-book='topic' lang='tpi'>health</div>
</div>
</body></html>");
var data = new BookData(bookDom, _collectionSettings, null);
Assert.AreEqual("health", data.GetVariableOrNull("topic", "en"));
Assert.IsNull(data.GetVariableOrNull("topic", "tpi"));
}