private static IEnumerable <Difference> Compare(
XElement firstElement,
XElement secondElement,
IEnumerable <string> comparedAttributeKeys,
FoundOnlyIn foundOnlyIn)
{
var diffs = new List <Difference>();
var firstXPath = GetXPathOf(firstElement, comparedAttributeKeys);
var elementsInSecond = secondElement.Document.XPathSelectElements(firstXPath);
if (elementsInSecond.Any() == false)
{
diffs.Add(Difference.Create(firstElement.ShallowCopy(), firstXPath, foundOnlyIn));
}
else if (elementsInSecond.Count() == 1)
{
// OK.
}
foreach (var child in firstElement.Elements())
{
diffs.AddRange(Compare(child, secondElement, comparedAttributeKeys, foundOnlyIn));
}
return(diffs);
}
internal static Difference Create(XElement element, string xpath, FoundOnlyIn foundOnlyIn)
{
if (foundOnlyIn == FoundOnlyIn.First)
{
return(new Difference(element, xpath, null, null));
}
else
{
return(new Difference(null, null, element, xpath));
}
}