public XmlReaderValidator(XmlReader subjectReader, XmlReader expectationReader, string because, object[] reasonArgs)
{
assertion = Execute.Assertion.BecauseOf(because, reasonArgs);
subjectIterator = new XmlIterator(subjectReader);
expectationIterator = new XmlIterator(expectationReader);
}
private Failure Validate()
{
if (subjectReader is null && expectationReader is null)
{
return(null);
}
Failure failure = ValidateAgainstNulls();
if (failure is not null)
{
return(failure);
}
subjectIterator = new XmlIterator(subjectReader);
expectationIterator = new XmlIterator(expectationReader);
while (!subjectIterator.IsEndOfDocument && !expectationIterator.IsEndOfDocument)
{
if (subjectIterator.NodeType != expectationIterator.NodeType)
{
var expectation = expectationIterator.NodeType == XmlNodeType.Text
? $"content \"{expectationIterator.Value}\""
: $"{expectationIterator.NodeType} \"{expectationIterator.LocalName}\"";
var subject = subjectIterator.NodeType == XmlNodeType.Text
? $"content \"{subjectIterator.Value}\""
: $"{subjectIterator.NodeType} \"{subjectIterator.LocalName}\"";
return(new Failure(
$"Expected {expectation} in {{context:subject}} at {{0}}{{reason}}, but found {subject}.",
currentNode.GetXPath()));
}
failure = null;
#pragma warning disable IDE0010 // The default case handles the many missing cases
switch (expectationIterator.NodeType)
#pragma warning restore IDE0010
{
case XmlNodeType.Element:
failure = ValidateStartElement();
if (failure is not null)
{
return(failure);
}
// starting new element, add local name to location stack
// to build XPath info
currentNode = currentNode.Push(expectationIterator.LocalName);
failure = ValidateAttributes();
if (expectationIterator.IsEmptyElement)
{
// The element is already complete. (We will NOT get an EndElement node.)
// Update node information.
currentNode = currentNode.Parent;
}
// check whether empty element and self-closing element needs to be synchronized
if (subjectIterator.IsEmptyElement && !expectationIterator.IsEmptyElement)
{
expectationIterator.MoveToEndElement();
}
else if (expectationIterator.IsEmptyElement && !subjectIterator.IsEmptyElement)
{
subjectIterator.MoveToEndElement();
}
break;
case XmlNodeType.EndElement:
// No need to verify end element, if it doesn't match
// the start element it isn't valid XML, so the parser
// would handle that.
currentNode.Pop();
currentNode = currentNode.Parent;
break;
case XmlNodeType.Text:
failure = ValidateText();
break;
default:
throw new NotSupportedException(
$"{expectationIterator.NodeType} found at {currentNode.GetXPath()} is not supported for equivalency comparison.");
}
if (failure is not null)
{
return(failure);
}
subjectIterator.Read();
expectationIterator.Read();
}
if (!expectationIterator.IsEndOfDocument)
{
return(new Failure(
"Expected {0} in {context:subject}{reason}, but found end of document.",
expectationIterator.LocalName));
}
if (!subjectIterator.IsEndOfDocument)
{
return(new Failure(
"Expected end of document in {context:subject}{reason}, but found {0}.",
subjectIterator.LocalName));
}
return(null);
}