private AlgoliaSearchIndex LoadIndexConfiguration(string fileName)
{
//Arrange
string xmlPath = @"Configuration\" + fileName;
var xmlDoc = new XmlDocument();
xmlDoc.Load(xmlPath);
XmlElement root = xmlDoc.DocumentElement;
var configNode = root.SelectSingleNode("//configuration//sitecore//contentSearch//configuration//indexes//index");
configNode.Should().NotBeNull();
var factory = new FakeFactory(xmlDoc);
//Act
return(factory.CreateObject <AlgoliaSearchIndex>(configNode));
}