# test for xml.dom.minidom

import os
import sys
import pickle
from io import StringIO
from test.support import verbose, run_unittest, TestSkipped
import unittest

import xml.dom
import xml.dom.minidom
import xml.parsers.expat

from xml.dom.minidom import parse, Node, Document, parseString
from xml.dom.minidom import getDOMImplementation


if __name__ == "__main__":
    base = sys.argv[0]
else:
    base = __file__
tstfile = os.path.join(os.path.dirname(base), "test.xml")
del base

# The tests of DocumentType importing use these helpers to construct
# the documents to work with, since not all DOM builders actually
# create the DocumentType nodes.
def create_doc_without_doctype(doctype=None):
    return getDOMImplementation().createDocument(None, "doc", doctype)

def create_nonempty_doctype():
    doctype = getDOMImplementation().createDocumentType("doc", None, None)
    doctype.entities._seq = []
    doctype.notations._seq = []
    notation = xml.dom.minidom.Notation("my-notation", None,
                                        "http://xml.python.org/notations/my")
    doctype.notations._seq.append(notation)
    entity = xml.dom.minidom.Entity("my-entity", None,
                                    "http://xml.python.org/entities/my",
                                    "my-notation")
    entity.version = "1.0"
    entity.encoding = "utf-8"
    entity.actualEncoding = "us-ascii"
    doctype.entities._seq.append(entity)
    return doctype

def create_doc_with_doctype():
    doctype = create_nonempty_doctype()
    doc = create_doc_without_doctype(doctype)
    doctype.entities.item(0).ownerDocument = doc
    doctype.notations.item(0).ownerDocument = doc
    return doc

class MinidomTest(unittest.TestCase):
    def tearDown(self):
        try:
            Node.allnodes
        except AttributeError:
            # We don't actually have the minidom from the standard library,
            # but are picking up the PyXML version from site-packages.
            pass
        else:
            self.confirm(len(Node.allnodes) == 0,
                    "assertion: len(Node.allnodes) == 0")
            if len(Node.allnodes):
                print("Garbage left over:")
                if verbose:
                    print(list(Node.allnodes.items())[0:10])
                else:
                    # Don't print specific nodes if repeatable results
                    # are needed
                    print(len(Node.allnodes))
            Node.allnodes = {}

    def confirm(self, test, testname = "Test"):
        self.assertTrue(test, testname)

    def checkWholeText(self, node, s):
        t = node.wholeText
        self.confirm(t == s, "looking for %s, found %s" % (repr(s), repr(t)))

    def testParseFromFile(self):
        dom = parse(StringIO(open(tstfile).read()))
        dom.unlink()
        self.confirm(isinstance(dom, Document))

    def testGetElementsByTagName(self):
        dom = parse(tstfile)
        self.confirm(dom.getElementsByTagName("LI") == \
                dom.documentElement.getElementsByTagName("LI"))
        dom.unlink()

    def testInsertBefore(self):
        dom = parseString("<doc><foo/></doc>")
        root = dom.documentElement
        elem = root.childNodes[0]
        nelem = dom.createElement("element")
        root.insertBefore(nelem, elem)
        self.confirm(len(root.childNodes) == 2
                and root.childNodes.length == 2
                and root.childNodes[0] is nelem
                and root.childNodes.item(0) is nelem
                and root.childNodes[1] is elem
                and root.childNodes.item(1) is elem
                and root.firstChild is nelem
                and root.lastChild is elem
                and root.toxml() == "<doc><element/><foo/></doc>"
                , "testInsertBefore -- node properly placed in tree")
        nelem = dom.createElement("element")
        root.insertBefore(nelem, None)
        self.confirm(len(root.childNodes) == 3
                and root.childNodes.length == 3
                and root.childNodes[1] is elem
                and root.childNodes.item(1) is elem
                and root.childNodes[2] is nelem
                and root.childNodes.item(2) is nelem
                and root.lastChild is nelem
                and nelem.previousSibling is elem
                and root.toxml() == "<doc><element/><foo/><element/></doc>"
                , "testInsertBefore -- node properly placed in tree")
        nelem2 = dom.createElement("bar")
        root.insertBefore(nelem2, nelem)
        self.confirm(len(root.childNodes) == 4
                and root.childNodes.length == 4
                and root.childNodes[2] is nelem2
                and root.childNodes.item(2) is nelem2
                and root.childNodes[3] is nelem
                and root.childNodes.item(3) is nelem
                and nelem2.nextSibling is nelem
                and nelem.previousSibling is nelem2
                and root.toxml() ==
                "<doc><element/><foo/><bar/><element/></doc>"
                , "testInsertBefore -- node properly placed in tree")
        dom.unlink()

    def _create_fragment_test_nodes(self):
        dom = parseString("<doc/>")
        orig = dom.createTextNode("original")
        c1 = dom.createTextNode("foo")
        c2 = dom.createTextNode("bar")
        c3 = dom.createTextNode("bat")
        dom.documentElement.appendChild(orig)
        frag = dom.createDocumentFragment()
        frag.appendChild(c1)
        frag.appendChild(c2)
        frag.appendChild(c3)
        return dom, orig, c1, c2, c3, frag

    def testInsertBeforeFragment(self):
        dom, orig, c1, c2, c3, frag = self._create_fragment_test_nodes()
        dom.documentElement.insertBefore(frag, None)
        self.confirm(tuple(dom.documentElement.childNodes) ==
                     (orig, c1, c2, c3),
                     "insertBefore(<fragment>, None)")
        frag.unlink()
        dom.unlink()

        dom, orig, c1, c2, c3, frag = self._create_fragment_test_nodes()
        dom.documentElement.insertBefore(frag, orig)
        self.confirm(tuple(dom.documentElement.childNodes) ==
                     (c1, c2, c3, orig),
                     "insertBefore(<fragment>, orig)")
        frag.unlink()
        dom.unlink()

    def testAppendChild(self):
        dom = parse(tstfile)
        dom.documentElement.appendChild(dom.createComment("Hello"))
        self.confirm(dom.documentElement.childNodes[-1].nodeName == "#comment")
        self.confirm(dom.documentElement.childNodes[-1].data == "Hello")
        dom.unlink()

    def testAppendChildFragment(self):
        dom, orig, c1, c2, c3, frag = self._create_fragment_test_nodes()
        dom.documentElement.appendChild(frag)
        self.confirm(tuple(dom.documentElement.childNodes) ==
                     (orig, c1, c2, c3),
                     "appendChild(<fragment>)")
        frag.unlink()
        dom.unlink()

    def testReplaceChildFragment(self):
        dom, orig, c1, c2, c3, frag = self._create_fragment_test_nodes()
        dom.documentElement.replaceChild(frag, orig)
        orig.unlink()
        self.confirm(tuple(dom.documentElement.childNodes) == (c1, c2, c3),
                "replaceChild(<fragment>)")
        frag.unlink()
        dom.unlink()

    def testLegalChildren(self):
        dom = Document()
        elem = dom.createElement('element')
        text = dom.createTextNode('text')
        self.assertRaises(xml.dom.HierarchyRequestErr, dom.appendChild, text)

        dom.appendChild(elem)
        self.assertRaises(xml.dom.HierarchyRequestErr, dom.insertBefore, text,
                          elem)
        self.assertRaises(xml.dom.HierarchyRequestErr, dom.replaceChild, text,
                          elem)

        nodemap = elem.attributes
        self.assertRaises(xml.dom.HierarchyRequestErr, nodemap.setNamedItem,
                          text)
        self.assertRaises(xml.dom.HierarchyRequestErr, nodemap.setNamedItemNS,
                          text)

        elem.appendChild(text)
        dom.unlink()

    def testNamedNodeMapSetItem(self):
        dom = Document()
        elem = dom.createElement('element')
        attrs = elem.attributes
        attrs["foo"] = "bar"
        a = attrs.item(0)
        self.confirm(a.ownerDocument is dom,
                "NamedNodeMap.__setitem__() sets ownerDocument")
        self.confirm(a.ownerElement is elem,
                "NamedNodeMap.__setitem__() sets ownerElement")
        self.confirm(a.value == "bar",
                "NamedNodeMap.__setitem__() sets value")
        self.confirm(a.nodeValue == "bar",
                "NamedNodeMap.__setitem__() sets nodeValue")
        elem.unlink()
        dom.unlink()

    def testNonZero(self):
        dom = parse(tstfile)
        self.confirm(dom)# should not be zero
        dom.appendChild(dom.createComment("foo"))
        self.confirm(not dom.childNodes[-1].childNodes)
        dom.unlink()

    def testUnlink(self):
        dom = parse(tstfile)
        dom.unlink()

    def testElement(self):
        dom = Document()
        dom.appendChild(dom.createElement("abc"))
        self.confirm(dom.documentElement)
        dom.unlink()

    def testAAA(self):
        dom = parseString("<abc/>")
        el = dom.documentElement
        el.setAttribute("spam", "jam2")
        self.confirm(el.toxml() == '<abc spam="jam2"/>', "testAAA")
        a = el.getAttributeNode("spam")
        self.confirm(a.ownerDocument is dom,
                "setAttribute() sets ownerDocument")
        self.confirm(a.ownerElement is dom.documentElement,
                "setAttribute() sets ownerElement")
        dom.unlink()

    def testAAB(self):
        dom = parseString("<abc/>")
        el = dom.documentElement
        el.setAttribute("spam", "jam")
        el.setAttribute("spam", "jam2")
        self.confirm(el.toxml() == '<abc spam="jam2"/>', "testAAB")
        dom.unlink()

    def testAddAttr(self):
        dom = Document()
        child = dom.appendChild(dom.createElement("abc"))

        child.setAttribute("def", "ghi")
        self.confirm(child.getAttribute("def") == "ghi")
        self.confirm(child.attributes["def"].value == "ghi")

        child.setAttribute("jkl", "mno")
        self.confirm(child.getAttribute("jkl") == "mno")
        self.confirm(child.attributes["jkl"].value == "mno")

        self.confirm(len(child.attributes) == 2)

        child.setAttribute("def", "newval")
        self.confirm(child.getAttribute("def") == "newval")
        self.confirm(child.attributes["def"].value == "newval")

        self.confirm(len(child.attributes) == 2)
        dom.unlink()

    def testDeleteAttr(self):
        dom = Document()
        child = dom.appendChild(dom.createElement("abc"))

        self.confirm(len(child.attributes) == 0)
        child.setAttribute("def", "ghi")
        self.confirm(len(child.attributes) == 1)
        del child.attributes["def"]
        self.confirm(len(child.attributes) == 0)
        dom.unlink()

    def testRemoveAttr(self):
        dom = Document()
        child = dom.appendChild(dom.createElement("abc"))

        child.setAttribute("def", "ghi")
        self.confirm(len(child.attributes) == 1)
        child.removeAttribute("def")
        self.confirm(len(child.attributes) == 0)
        dom.unlink()

    def testRemoveAttrNS(self):
        dom = Document()
        child = dom.appendChild(
                dom.createElementNS("http://www.python.org", "python:abc"))
        child.setAttributeNS("http://www.w3.org", "xmlns:python",
                                                "http://www.python.org")
        child.setAttributeNS("http://www.python.org", "python:abcattr", "foo")
        self.confirm(len(child.attributes) == 2)
        child.removeAttributeNS("http://www.python.org", "abcattr")
        self.confirm(len(child.attributes) == 1)
        dom.unlink()

    def testRemoveAttributeNode(self):
        dom = Document()
        child = dom.appendChild(dom.createElement("foo"))
        child.setAttribute("spam", "jam")
        self.confirm(len(child.attributes) == 1)
        node = child.getAttributeNode("spam")
        child.removeAttributeNode(node)
        self.confirm(len(child.attributes) == 0
                and child.getAttributeNode("spam") is None)
        dom.unlink()

    def testChangeAttr(self):
        dom = parseString("<abc/>")
        el = dom.documentElement
        el.setAttribute("spam", "jam")
        self.confirm(len(el.attributes) == 1)
        el.setAttribute("spam", "bam")
        # Set this attribute to be an ID and make sure that doesn't change
        # when changing the value:
        el.setIdAttribute("spam")
        self.confirm(len(el.attributes) == 1
                and el.attributes["spam"].value == "bam"
                and el.attributes["spam"].nodeValue == "bam"
                and el.getAttribute("spam") == "bam"
                and el.getAttributeNode("spam").isId)
        el.attributes["spam"] = "ham"
        self.confirm(len(el.attributes) == 1
                and el.attributes["spam"].value == "ham"
                and el.attributes["spam"].nodeValue == "ham"
                and el.getAttribute("spam") == "ham"
                and el.attributes["spam"].isId)
        el.setAttribute("spam2", "bam")
        self.confirm(len(el.attributes) == 2
                and el.attributes["spam"].value == "ham"
                and el.attributes["spam"].nodeValue == "ham"
                and el.getAttribute("spam") == "ham"
                and el.attributes["spam2"].value == "bam"
                and el.attributes["spam2"].nodeValue == "bam"
                and el.getAttribute("spam2") == "bam")
        el.attributes["spam2"] = "bam2"
        self.confirm(len(el.attributes) == 2
                and el.attributes["spam"].value == "ham"
                and el.attributes["spam"].nodeValue == "ham"
                and el.getAttribute("spam") == "ham"
                and el.attributes["spam2"].value == "bam2"
                and el.attributes["spam2"].nodeValue == "bam2"
                and el.getAttribute("spam2") == "bam2")
        dom.unlink()

    def testGetAttrList(self):
        pass

    def testGetAttrValues(self): pass

    def testGetAttrLength(self): pass

    def testGetAttribute(self): pass

    def testGetAttributeNS(self): pass

    def testGetAttributeNode(self): pass

    def testGetElementsByTagNameNS(self):
        d="""<foo xmlns:minidom='http://pyxml.sf.net/minidom'>
        <minidom:myelem/>
        </foo>"""
        dom = parseString(d)
        elems = dom.getElementsByTagNameNS("http://pyxml.sf.net/minidom",
                                           "myelem")
        self.confirm(len(elems) == 1
                and elems[0].namespaceURI == "http://pyxml.sf.net/minidom"
                and elems[0].localName == "myelem"
                and elems[0].prefix == "minidom"
                and elems[0].tagName == "minidom:myelem"
                and elems[0].nodeName == "minidom:myelem")
        dom.unlink()

    def get_empty_nodelist_from_elements_by_tagName_ns_helper(self, doc, nsuri,
                                                              lname):
        nodelist = doc.getElementsByTagNameNS(nsuri, lname)
        self.confirm(len(nodelist) == 0)

    def testGetEmptyNodeListFromElementsByTagNameNS(self):
        doc = parseString('<doc/>')
        self.get_empty_nodelist_from_elements_by_tagName_ns_helper(
            doc, 'http://xml.python.org/namespaces/a', 'localname')
        self.get_empty_nodelist_from_elements_by_tagName_ns_helper(
            doc, '*', 'splat')
        self.get_empty_nodelist_from_elements_by_tagName_ns_helper(
            doc, 'http://xml.python.org/namespaces/a', '*')

        doc = parseString('<doc xmlns="http://xml.python.org/splat"><e/></doc>')
        self.get_empty_nodelist_from_elements_by_tagName_ns_helper(
            doc, "http://xml.python.org/splat", "not-there")
        self.get_empty_nodelist_from_elements_by_tagName_ns_helper(
            doc, "*", "not-there")
        self.get_empty_nodelist_from_elements_by_tagName_ns_helper(
            doc, "http://somewhere.else.net/not-there", "e")

    def testElementReprAndStr(self):
        dom = Document()
        el = dom.appendChild(dom.createElement("abc"))
        string1 = repr(el)
        string2 = str(el)
        self.confirm(string1 == string2)
        dom.unlink()

    def testElementReprAndStrUnicode(self):
        dom = Document()
        el = dom.appendChild(dom.createElement("abc"))
        string1 = repr(el)
        string2 = str(el)
        self.confirm(string1 == string2)
        dom.unlink()

    def testElementReprAndStrUnicodeNS(self):
        dom = Document()
        el = dom.appendChild(
            dom.createElementNS("http://www.slashdot.org", "slash:abc"))
        string1 = repr(el)
        string2 = str(el)
        self.confirm(string1 == string2)
        self.confirm(string1.find("slash:abc") != -1)
        dom.unlink()

    def testAttributeRepr(self):
        dom = Document()
        el = dom.appendChild(dom.createElement("abc"))
        node = el.setAttribute("abc", "def")
        self.confirm(str(node) == repr(node))
        dom.unlink()

    def testTextNodeRepr(self): pass

    def testWriteXML(self):
        str = '<?xml version="1.0" ?><a b="c"/>'
        dom = parseString(str)
        domstr = dom.toxml()
        dom.unlink()
        self.confirm(str == domstr)

    def testAltNewline(self):
        str = '<?xml version="1.0" ?>\n<a b="c"/>\n'
        dom = parseString(str)
        domstr = dom.toprettyxml(newl="\r\n")
        dom.unlink()
        self.confirm(domstr == str.replace("\n", "\r\n"))

    def testProcessingInstruction(self):
        dom = parseString('<e><?mypi \t\n data \t\n ?></e>')
        pi = dom.documentElement.firstChild
        self.confirm(pi.target == "mypi"
                and pi.data == "data \t\n "
                and pi.nodeName == "mypi"
                and pi.nodeType == Node.PROCESSING_INSTRUCTION_NODE
                and pi.attributes is None
                and not pi.hasChildNodes()
                and len(pi.childNodes) == 0
                and pi.firstChild is None
                and pi.lastChild is None
                and pi.localName is None
                and pi.namespaceURI == xml.dom.EMPTY_NAMESPACE)

    def testProcessingInstructionRepr(self): pass

    def testTextRepr(self): pass

    def testWriteText(self): pass

    def testDocumentElement(self): pass

    def testTooManyDocumentElements(self):
        doc = parseString("<doc/>")
        elem = doc.createElement("extra")
        # Should raise an exception when adding an extra document element.
        self.assertRaises(xml.dom.HierarchyRequestErr, doc.appendChild, elem)
        elem.unlink()
        doc.unlink()

    def testCreateElementNS(self): pass

    def testCreateAttributeNS(self): pass

    def testParse(self): pass

    def testParseString(self): pass

    def testComment(self): pass

    def testAttrListItem(self): pass

    def testAttrListItems(self): pass

    def testAttrListItemNS(self): pass

    def testAttrListKeys(self): pass

    def testAttrListKeysNS(self): pass

    def testRemoveNamedItem(self):
        doc = parseString("<doc a=''/>")
        e = doc.documentElement
        attrs = e.attributes
        a1 = e.getAttributeNode("a")
        a2 = attrs.removeNamedItem("a")
        self.confirm(a1.isSameNode(a2))
        self.assertRaises(xml.dom.NotFoundErr, attrs.removeNamedItem, "a")

    def testRemoveNamedItemNS(self):
        doc = parseString("<doc xmlns:a='http://xml.python.org/' a:b=''/>")
        e = doc.documentElement
        attrs = e.attributes
        a1 = e.getAttributeNodeNS("http://xml.python.org/", "b")
        a2 = attrs.removeNamedItemNS("http://xml.python.org/", "b")
        self.confirm(a1.isSameNode(a2))
        self.assertRaises(xml.dom.NotFoundErr, attrs.removeNamedItemNS,
                          "http://xml.python.org/", "b")

    def testAttrListValues(self): pass

    def testAttrListLength(self): pass

    def testAttrList__getitem__(self): pass

    def testAttrList__setitem__(self): pass

    def testSetAttrValueandNodeValue(self): pass

    def testParseElement(self): pass

    def testParseAttributes(self): pass

    def testParseElementNamespaces(self): pass

    def testParseAttributeNamespaces(self): pass

    def testParseProcessingInstructions(self): pass

    def testChildNodes(self): pass

    def testFirstChild(self): pass

    def testHasChildNodes(self): pass

    def _testCloneElementCopiesAttributes(self, e1, e2, test):
        attrs1 = e1.attributes
        attrs2 = e2.attributes
        keys1 = list(attrs1.keys())
        keys2 = list(attrs2.keys())
        keys1.sort()
        keys2.sort()
        self.confirm(keys1 == keys2, "clone of element has same attribute keys")
        for i in range(len(keys1)):
            a1 = attrs1.item(i)
            a2 = attrs2.item(i)
            self.confirm(a1 is not a2
                    and a1.value == a2.value
                    and a1.nodeValue == a2.nodeValue
                    and a1.namespaceURI == a2.namespaceURI
                    and a1.localName == a2.localName
                    , "clone of attribute node has proper attribute values")
            self.confirm(a2.ownerElement is e2,
                    "clone of attribute node correctly owned")

    def _setupCloneElement(self, deep):
        dom = parseString("<doc attr='value'><foo/></doc>")
        root = dom.documentElement
        clone = root.cloneNode(deep)
        self._testCloneElementCopiesAttributes(
            root, clone, "testCloneElement" + (deep and "Deep" or "Shallow"))
        # mutilate the original so shared data is detected
        root.tagName = root.nodeName = "MODIFIED"
        root.setAttribute("attr", "NEW VALUE")
        root.setAttribute("added", "VALUE")
        return dom, clone

    def testCloneElementShallow(self):
        dom, clone = self._setupCloneElement(0)
        self.confirm(len(clone.childNodes) == 0
                and clone.childNodes.length == 0
                and clone.parentNode is None
                and clone.toxml() == '<doc attr="value"/>'
                , "testCloneElementShallow")
        dom.unlink()

    def testCloneElementDeep(self):
        dom, clone = self._setupCloneElement(1)
        self.confirm(len(clone.childNodes) == 1
                and clone.childNodes.length == 1
                and clone.parentNode is None
                and clone.toxml() == '<doc attr="value"><foo/></doc>'
                , "testCloneElementDeep")
        dom.unlink()

    def testCloneDocumentShallow(self):
        doc = parseString("<?xml version='1.0'?>\n"
                    "<!-- comment -->"
                    "<!DOCTYPE doc [\n"
                    "<!NOTATION notation SYSTEM 'http://xml.python.org/'>\n"
                    "]>\n"
                    "<doc attr='value'/>")
        doc2 = doc.cloneNode(0)
        self.confirm(doc2 is None,
                "testCloneDocumentShallow:"
                " shallow cloning of documents makes no sense!")

    def testCloneDocumentDeep(self):
        doc = parseString("<?xml version='1.0'?>\n"
                    "<!-- comment -->"
                    "<!DOCTYPE doc [\n"
                    "<!NOTATION notation SYSTEM 'http://xml.python.org/'>\n"
                    "]>\n"
                    "<doc attr='value'/>")
        doc2 = doc.cloneNode(1)
        self.confirm(not (doc.isSameNode(doc2) or doc2.isSameNode(doc)),
                "testCloneDocumentDeep: document objects not distinct")
        self.confirm(len(doc.childNodes) == len(doc2.childNodes),
                "testCloneDocumentDeep: wrong number of Document children")
        self.confirm(doc2.documentElement.nodeType == Node.ELEMENT_NODE,
                "testCloneDocumentDeep: documentElement not an ELEMENT_NODE")
        self.confirm(doc2.documentElement.ownerDocument.isSameNode(doc2),
            "testCloneDocumentDeep: documentElement owner is not new document")
        self.confirm(not doc.documentElement.isSameNode(doc2.documentElement),
                "testCloneDocumentDeep: documentElement should not be shared")
        if doc.doctype is not None:
            # check the doctype iff the original DOM maintained it
            self.confirm(doc2.doctype.nodeType == Node.DOCUMENT_TYPE_NODE,
                    "testCloneDocumentDeep: doctype not a DOCUMENT_TYPE_NODE")
            self.confirm(doc2.doctype.ownerDocument.isSameNode(doc2))
            self.confirm(not doc.doctype.isSameNode(doc2.doctype))

    def testCloneDocumentTypeDeepOk(self):
        doctype = create_nonempty_doctype()
        clone = doctype.cloneNode(1)
        self.confirm(clone is not None
                and clone.nodeName == doctype.nodeName
                and clone.name == doctype.name
                and clone.publicId == doctype.publicId
                and clone.systemId == doctype.systemId
                and len(clone.entities) == len(doctype.entities)
                and clone.entities.item(len(clone.entities)) is None
                and len(clone.notations) == len(doctype.notations)
                and clone.notations.item(len(clone.notations)) is None
                and len(clone.childNodes) == 0)
        for i in range(len(doctype.entities)):
            se = doctype.entities.item(i)
            ce = clone.entities.item(i)
            self.confirm((not se.isSameNode(ce))
                    and (not ce.isSameNode(se))
                    and ce.nodeName == se.nodeName
                    and ce.notationName == se.notationName
                    and ce.publicId == se.publicId
                    and ce.systemId == se.systemId
                    and ce.encoding == se.encoding
                    and ce.actualEncoding == se.actualEncoding
                    and ce.version == se.version)
        for i in range(len(doctype.notations)):
            sn = doctype.notations.item(i)
            cn = clone.notations.item(i)
            self.confirm((not sn.isSameNode(cn))
                    and (not cn.isSameNode(sn))
                    and cn.nodeName == sn.nodeName
                    and cn.publicId == sn.publicId
                    and cn.systemId == sn.systemId)

    def testCloneDocumentTypeDeepNotOk(self):
        doc = create_doc_with_doctype()
        clone = doc.doctype.cloneNode(1)
        self.confirm(clone is None, "testCloneDocumentTypeDeepNotOk")

    def testCloneDocumentTypeShallowOk(self):
        doctype = create_nonempty_doctype()
        clone = doctype.cloneNode(0)
        self.confirm(clone is not None
                and clone.nodeName == doctype.nodeName
                and clone.name == doctype.name
                and clone.publicId == doctype.publicId
                and clone.systemId == doctype.systemId
                and len(clone.entities) == 0
                and clone.entities.item(0) is None
                and len(clone.notations) == 0
                and clone.notations.item(0) is None
                and len(clone.childNodes) == 0)

    def testCloneDocumentTypeShallowNotOk(self):
        doc = create_doc_with_doctype()
        clone = doc.doctype.cloneNode(0)
        self.confirm(clone is None, "testCloneDocumentTypeShallowNotOk")

    def check_import_document(self, deep, testName):
        doc1 = parseString("<doc/>")
        doc2 = parseString("<doc/>")
        self.assertRaises(xml.dom.NotSupportedErr, doc1.importNode, doc2, deep)

    def testImportDocumentShallow(self):
        self.check_import_document(0, "testImportDocumentShallow")

    def testImportDocumentDeep(self):
        self.check_import_document(1, "testImportDocumentDeep")

    def testImportDocumentTypeShallow(self):
        src = create_doc_with_doctype()
        target = create_doc_without_doctype()
        self.assertRaises(xml.dom.NotSupportedErr, target.importNode,
                          src.doctype, 0)

    def testImportDocumentTypeDeep(self):
        src = create_doc_with_doctype()
        target = create_doc_without_doctype()
        self.assertRaises(xml.dom.NotSupportedErr, target.importNode,
                          src.doctype, 1)

    # Testing attribute clones uses a helper, and should always be deep,
    # even if the argument to cloneNode is false.
    def check_clone_attribute(self, deep, testName):
        doc = parseString("<doc attr='value'/>")
        attr = doc.documentElement.getAttributeNode("attr")
        self.failIfEqual(attr, None)
        clone = attr.cloneNode(deep)
        self.confirm(not clone.isSameNode(attr))
        self.confirm(not attr.isSameNode(clone))
        self.confirm(clone.ownerElement is None,
                testName + ": ownerElement should be None")
        self.confirm(clone.ownerDocument.isSameNode(attr.ownerDocument),
                testName + ": ownerDocument does not match")
        self.confirm(clone.specified,
                testName + ": cloned attribute must have specified == True")

    def testCloneAttributeShallow(self):
        self.check_clone_attribute(0, "testCloneAttributeShallow")

    def testCloneAttributeDeep(self):
        self.check_clone_attribute(1, "testCloneAttributeDeep")

    def check_clone_pi(self, deep, testName):
        doc = parseString("<?target data?><doc/>")
        pi = doc.firstChild
        self.assertEquals(pi.nodeType, Node.PROCESSING_INSTRUCTION_NODE)
        clone = pi.cloneNode(deep)
        self.confirm(clone.target == pi.target
                and clone.data == pi.data)

    def testClonePIShallow(self):
        self.check_clone_pi(0, "testClonePIShallow")

    def testClonePIDeep(self):
        self.check_clone_pi(1, "testClonePIDeep")

    def testNormalize(self):
        doc = parseString("<doc/>")
        root = doc.documentElement
        root.appendChild(doc.createTextNode("first"))
        root.appendChild(doc.createTextNode("second"))
        self.confirm(len(root.childNodes) == 2
                and root.childNodes.length == 2,
                "testNormalize -- preparation")
        doc.normalize()
        self.confirm(len(root.childNodes) == 1
                and root.childNodes.length == 1
                and root.firstChild is root.lastChild
                and root.firstChild.data == "firstsecond"
                , "testNormalize -- result")
        doc.unlink()

        doc = parseString("<doc/>")
        root = doc.documentElement
        root.appendChild(doc.createTextNode(""))
        doc.normalize()
        self.confirm(len(root.childNodes) == 0
                and root.childNodes.length == 0,
                "testNormalize -- single empty node removed")
        doc.unlink()

    def testBug1433694(self):
        doc = parseString("<o><i/>t</o>")
        node = doc.documentElement
        node.childNodes[1].nodeValue = ""
        node.normalize()
        self.confirm(node.childNodes[-1].nextSibling == None,
                     "Final child's .nextSibling should be None")

    def testSiblings(self):
        doc = parseString("<doc><?pi?>text?<elm/></doc>")
        root = doc.documentElement
        (pi, text, elm) = root.childNodes

        self.confirm(pi.nextSibling is text and
                pi.previousSibling is None and
                text.nextSibling is elm and
                text.previousSibling is pi and
                elm.nextSibling is None and
                elm.previousSibling is text, "testSiblings")

        doc.unlink()

    def testParents(self):
        doc = parseString(
            "<doc><elm1><elm2/><elm2><elm3/></elm2></elm1></doc>")
        root = doc.documentElement
        elm1 = root.childNodes[0]
        (elm2a, elm2b) = elm1.childNodes
        elm3 = elm2b.childNodes[0]

        self.confirm(root.parentNode is doc and
                elm1.parentNode is root and
                elm2a.parentNode is elm1 and
                elm2b.parentNode is elm1 and
                elm3.parentNode is elm2b, "testParents")
        doc.unlink()

    def testNodeListItem(self):
        doc = parseString("<doc><e/><e/></doc>")
        children = doc.childNodes
        docelem = children[0]
        self.confirm(children[0] is children.item(0)
                and children.item(1) is None
                and docelem.childNodes.item(0) is docelem.childNodes[0]
                and docelem.childNodes.item(1) is docelem.childNodes[1]
                and docelem.childNodes.item(0).childNodes.item(0) is None,
                "test NodeList.item()")
        doc.unlink()

    def testSAX2DOM(self):
        from xml.dom import pulldom

        sax2dom = pulldom.SAX2DOM()
        sax2dom.startDocument()
        sax2dom.startElement("doc", {})
        sax2dom.characters("text")
        sax2dom.startElement("subelm", {})
        sax2dom.characters("text")
        sax2dom.endElement("subelm")
        sax2dom.characters("text")
        sax2dom.endElement("doc")
        sax2dom.endDocument()

        doc = sax2dom.document
        root = doc.documentElement
        (text1, elm1, text2) = root.childNodes
        text3 = elm1.childNodes[0]

        self.confirm(text1.previousSibling is None and
                text1.nextSibling is elm1 and
                elm1.previousSibling is text1 and
                elm1.nextSibling is text2 and
                text2.previousSibling is elm1 and
                text2.nextSibling is None and
                text3.previousSibling is None and
                text3.nextSibling is None, "testSAX2DOM - siblings")

        self.confirm(root.parentNode is doc and
                text1.parentNode is root and
                elm1.parentNode is root and
                text2.parentNode is root and
                text3.parentNode is elm1, "testSAX2DOM - parents")
        doc.unlink()

    def testEncodings(self):
        doc = parseString('<foo>&#x20ac;</foo>')
        self.assertEqual(doc.toxml(),
                         '<?xml version="1.0" ?><foo>\u20ac</foo>')
        self.assertEqual(doc.toxml('utf-8'),
            b'<?xml version="1.0" encoding="utf-8"?><foo>\xe2\x82\xac</foo>')
        self.assertEqual(doc.toxml('iso-8859-15'),
            b'<?xml version="1.0" encoding="iso-8859-15"?><foo>\xa4</foo>')

        # Verify that character decoding errors throw exceptions instead
        # of crashing
        self.assertRaises(UnicodeDecodeError, parseString,
                b'<fran\xe7ais>Comment \xe7a va ? Tr\xe8s bien ?</fran\xe7ais>')

        doc.unlink()

    class UserDataHandler:
        called = 0
        def handle(self, operation, key, data, src, dst):
            dst.setUserData(key, data + 1, self)
            src.setUserData(key, None, None)
            self.called = 1

    def testUserData(self):
        dom = Document()
        n = dom.createElement('e')
        self.confirm(n.getUserData("foo") is None)
        n.setUserData("foo", None, None)
        self.confirm(n.getUserData("foo") is None)
        n.setUserData("foo", 12, 12)
        n.setUserData("bar", 13, 13)
        self.confirm(n.getUserData("foo") == 12)
        self.confirm(n.getUserData("bar") == 13)
        n.setUserData("foo", None, None)
        self.confirm(n.getUserData("foo") is None)
        self.confirm(n.getUserData("bar") == 13)

        handler = self.UserDataHandler()
        n.setUserData("bar", 12, handler)
        c = n.cloneNode(1)
        self.confirm(handler.called
                and n.getUserData("bar") is None
                and c.getUserData("bar") == 13)
        n.unlink()
        c.unlink()
        dom.unlink()

    def checkRenameNodeSharedConstraints(self, doc, node):
        # Make sure illegal NS usage is detected:
        self.assertRaises(xml.dom.NamespaceErr, doc.renameNode, node,
                          "http://xml.python.org/ns", "xmlns:foo")
        doc2 = parseString("<doc/>")
        self.assertRaises(xml.dom.WrongDocumentErr, doc2.renameNode, node,
                          xml.dom.EMPTY_NAMESPACE, "foo")

    def testRenameAttribute(self):
        doc = parseString("<doc a='v'/>")
        elem = doc.documentElement
        attrmap = elem.attributes
        attr = elem.attributes['a']

        # Simple renaming
        attr = doc.renameNode(attr, xml.dom.EMPTY_NAMESPACE, "b")
        self.confirm(attr.name == "b"
                and attr.nodeName == "b"
                and attr.localName is None
                and attr.namespaceURI == xml.dom.EMPTY_NAMESPACE
                and attr.prefix is None
                and attr.value == "v"
                and elem.getAttributeNode("a") is None
                and elem.getAttributeNode("b").isSameNode(attr)
                and attrmap["b"].isSameNode(attr)
                and attr.ownerDocument.isSameNode(doc)
                and attr.ownerElement.isSameNode(elem))

        # Rename to have a namespace, no prefix
        attr = doc.renameNode(attr, "http://xml.python.org/ns", "c")
        self.confirm(attr.name == "c"
                and attr.nodeName == "c"
                and attr.localName == "c"
                and attr.namespaceURI == "http://xml.python.org/ns"
                and attr.prefix is None
                and attr.value == "v"
                and elem.getAttributeNode("a") is None
                and elem.getAttributeNode("b") is None
                and elem.getAttributeNode("c").isSameNode(attr)
                and elem.getAttributeNodeNS(
                    "http://xml.python.org/ns", "c").isSameNode(attr)
                and attrmap["c"].isSameNode(attr)
                and attrmap[("http://xml.python.org/ns", "c")].isSameNode(attr))

        # Rename to have a namespace, with prefix
        attr = doc.renameNode(attr, "http://xml.python.org/ns2", "p:d")
        self.confirm(attr.name == "p:d"
                and attr.nodeName == "p:d"
                and attr.localName == "d"
                and attr.namespaceURI == "http://xml.python.org/ns2"
                and attr.prefix == "p"
                and attr.value == "v"
                and elem.getAttributeNode("a") is None
                and elem.getAttributeNode("b") is None
                and elem.getAttributeNode("c") is None
                and elem.getAttributeNodeNS(
                    "http://xml.python.org/ns", "c") is None
                and elem.getAttributeNode("p:d").isSameNode(attr)
                and elem.getAttributeNodeNS(
                    "http://xml.python.org/ns2", "d").isSameNode(attr)
                and attrmap["p:d"].isSameNode(attr)
                and attrmap[("http://xml.python.org/ns2", "d")].isSameNode(attr))

        # Rename back to a simple non-NS node
        attr = doc.renameNode(attr, xml.dom.EMPTY_NAMESPACE, "e")
        self.confirm(attr.name == "e"
                and attr.nodeName == "e"
                and attr.localName is None
                and attr.namespaceURI == xml.dom.EMPTY_NAMESPACE
                and attr.prefix is None
                and attr.value == "v"
                and elem.getAttributeNode("a") is None
                and elem.getAttributeNode("b") is None
                and elem.getAttributeNode("c") is None
                and elem.getAttributeNode("p:d") is None
                and elem.getAttributeNodeNS(
                    "http://xml.python.org/ns", "c") is None
                and elem.getAttributeNode("e").isSameNode(attr)
                and attrmap["e"].isSameNode(attr))

        self.assertRaises(xml.dom.NamespaceErr, doc.renameNode, attr,
                          "http://xml.python.org/ns", "xmlns")
        self.checkRenameNodeSharedConstraints(doc, attr)
        doc.unlink()

    def testRenameElement(self):
        doc = parseString("<doc/>")
        elem = doc.documentElement

        # Simple renaming
        elem = doc.renameNode(elem, xml.dom.EMPTY_NAMESPACE, "a")
        self.confirm(elem.tagName == "a"
                and elem.nodeName == "a"
                and elem.localName is None
                and elem.namespaceURI == xml.dom.EMPTY_NAMESPACE
                and elem.prefix is None
                and elem.ownerDocument.isSameNode(doc))

        # Rename to have a namespace, no prefix
        elem = doc.renameNode(elem, "http://xml.python.org/ns", "b")
        self.confirm(elem.tagName == "b"
                and elem.nodeName == "b"
                and elem.localName == "b"
                and elem.namespaceURI == "http://xml.python.org/ns"
                and elem.prefix is None
                and elem.ownerDocument.isSameNode(doc))

        # Rename to have a namespace, with prefix
        elem = doc.renameNode(elem, "http://xml.python.org/ns2", "p:c")
        self.confirm(elem.tagName == "p:c"
                and elem.nodeName == "p:c"
                and elem.localName == "c"
                and elem.namespaceURI == "http://xml.python.org/ns2"
                and elem.prefix == "p"
                and elem.ownerDocument.isSameNode(doc))

        # Rename back to a simple non-NS node
        elem = doc.renameNode(elem, xml.dom.EMPTY_NAMESPACE, "d")
        self.confirm(elem.tagName == "d"
                and elem.nodeName == "d"
                and elem.localName is None
                and elem.namespaceURI == xml.dom.EMPTY_NAMESPACE
                and elem.prefix is None
                and elem.ownerDocument.isSameNode(doc))

        self.checkRenameNodeSharedConstraints(doc, elem)
        doc.unlink()

    def testRenameOther(self):
        # We have to create a comment node explicitly since not all DOM
        # builders used with minidom add comments to the DOM.
        doc = xml.dom.minidom.getDOMImplementation().createDocument(
            xml.dom.EMPTY_NAMESPACE, "e", None)
        node = doc.createComment("comment")
        self.assertRaises(xml.dom.NotSupportedErr, doc.renameNode, node,
                          xml.dom.EMPTY_NAMESPACE, "foo")
        doc.unlink()

    def testWholeText(self):
        doc = parseString("<doc>a</doc>")
        elem = doc.documentElement
        text = elem.childNodes[0]
        self.assertEquals(text.nodeType, Node.TEXT_NODE)

        self.checkWholeText(text, "a")
        elem.appendChild(doc.createTextNode("b"))
        self.checkWholeText(text, "ab")
        elem.insertBefore(doc.createCDATASection("c"), text)
        self.checkWholeText(text, "cab")

        # make sure we don't cross other nodes
        splitter = doc.createComment("comment")
        elem.appendChild(splitter)
        text2 = doc.createTextNode("d")
        elem.appendChild(text2)
        self.checkWholeText(text, "cab")
        self.checkWholeText(text2, "d")

        x = doc.createElement("x")
        elem.replaceChild(x, splitter)
        splitter = x
        self.checkWholeText(text, "cab")
        self.checkWholeText(text2, "d")

        x = doc.createProcessingInstruction("y", "z")
        elem.replaceChild(x, splitter)
        splitter = x
        self.checkWholeText(text, "cab")
        self.checkWholeText(text2, "d")

        elem.removeChild(splitter)
        self.checkWholeText(text, "cabd")
        self.checkWholeText(text2, "cabd")

    def testPatch1094164(self):
        doc = parseString("<doc><e/></doc>")
        elem = doc.documentElement
        e = elem.firstChild
        self.confirm(e.parentNode is elem, "Before replaceChild()")
        # Check that replacing a child with itself leaves the tree unchanged
        elem.replaceChild(e, e)
        self.confirm(e.parentNode is elem, "After replaceChild()")

    def testReplaceWholeText(self):
        def setup():
            doc = parseString("<doc>a<e/>d</doc>")
            elem = doc.documentElement
            text1 = elem.firstChild
            text2 = elem.lastChild
            splitter = text1.nextSibling
            elem.insertBefore(doc.createTextNode("b"), splitter)
            elem.insertBefore(doc.createCDATASection("c"), text1)
            return doc, elem, text1, splitter, text2

        doc, elem, text1, splitter, text2 = setup()
        text = text1.replaceWholeText("new content")
        self.checkWholeText(text, "new content")
        self.checkWholeText(text2, "d")
        self.confirm(len(elem.childNodes) == 3)

        doc, elem, text1, splitter, text2 = setup()
        text = text2.replaceWholeText("new content")
        self.checkWholeText(text, "new content")
        self.checkWholeText(text1, "cab")
        self.confirm(len(elem.childNodes) == 5)

        doc, elem, text1, splitter, text2 = setup()
        text = text1.replaceWholeText("")
        self.checkWholeText(text2, "d")
        self.confirm(text is None
                and len(elem.childNodes) == 2)

    def testSchemaType(self):
        doc = parseString(
            "<!DOCTYPE doc [\n"
            "  <!ENTITY e1 SYSTEM 'http://xml.python.org/e1'>\n"
            "  <!ENTITY e2 SYSTEM 'http://xml.python.org/e2'>\n"
            "  <!ATTLIST doc id   ID       #IMPLIED \n"
            "                ref  IDREF    #IMPLIED \n"
            "                refs IDREFS   #IMPLIED \n"
            "                enum (a|b)    #IMPLIED \n"
            "                ent  ENTITY   #IMPLIED \n"
            "                ents ENTITIES #IMPLIED \n"
            "                nm   NMTOKEN  #IMPLIED \n"
            "                nms  NMTOKENS #IMPLIED \n"
            "                text CDATA    #IMPLIED \n"
            "    >\n"
            "]><doc id='name' notid='name' text='splat!' enum='b'"
            "       ref='name' refs='name name' ent='e1' ents='e1 e2'"
            "       nm='123' nms='123 abc' />")
        elem = doc.documentElement
        # We don't want to rely on any specific loader at this point, so
        # just make sure we can get to all the names, and that the
        # DTD-based namespace is right.  The names can vary by loader
        # since each supports a different level of DTD information.
        t = elem.schemaType
        self.confirm(t.name is None
                and t.namespace == xml.dom.EMPTY_NAMESPACE)
        names = "id notid text enum ref refs ent ents nm nms".split()
        for name in names:
            a = elem.getAttributeNode(name)
            t = a.schemaType
            self.confirm(hasattr(t, "name")
                    and t.namespace == xml.dom.EMPTY_NAMESPACE)

    def testSetIdAttribute(self):
        doc = parseString("<doc a1='v' a2='w'/>")
        e = doc.documentElement
        a1 = e.getAttributeNode("a1")
        a2 = e.getAttributeNode("a2")
        self.confirm(doc.getElementById("v") is None
                and not a1.isId
                and not a2.isId)
        e.setIdAttribute("a1")
        self.confirm(e.isSameNode(doc.getElementById("v"))
                and a1.isId
                and not a2.isId)
        e.setIdAttribute("a2")
        self.confirm(e.isSameNode(doc.getElementById("v"))
                and e.isSameNode(doc.getElementById("w"))
                and a1.isId
                and a2.isId)
        # replace the a1 node; the new node should *not* be an ID
        a3 = doc.createAttribute("a1")
        a3.value = "v"
        e.setAttributeNode(a3)
        self.confirm(doc.getElementById("v") is None
                and e.isSameNode(doc.getElementById("w"))
                and not a1.isId
                and a2.isId
                and not a3.isId)
        # renaming an attribute should not affect its ID-ness:
        doc.renameNode(a2, xml.dom.EMPTY_NAMESPACE, "an")
        self.confirm(e.isSameNode(doc.getElementById("w"))
                and a2.isId)

    def testSetIdAttributeNS(self):
        NS1 = "http://xml.python.org/ns1"
        NS2 = "http://xml.python.org/ns2"
        doc = parseString("<doc"
                          " xmlns:ns1='" + NS1 + "'"
                          " xmlns:ns2='" + NS2 + "'"
                          " ns1:a1='v' ns2:a2='w'/>")
        e = doc.documentElement
        a1 = e.getAttributeNodeNS(NS1, "a1")
        a2 = e.getAttributeNodeNS(NS2, "a2")
        self.confirm(doc.getElementById("v") is None
                and not a1.isId
                and not a2.isId)
        e.setIdAttributeNS(NS1, "a1")
        self.confirm(e.isSameNode(doc.getElementById("v"))
                and a1.isId
                and not a2.isId)
        e.setIdAttributeNS(NS2, "a2")
        self.confirm(e.isSameNode(doc.getElementById("v"))
                and e.isSameNode(doc.getElementById("w"))
                and a1.isId
                and a2.isId)
        # replace the a1 node; the new node should *not* be an ID
        a3 = doc.createAttributeNS(NS1, "a1")
        a3.value = "v"
        e.setAttributeNode(a3)
        self.confirm(e.isSameNode(doc.getElementById("w")))
        self.confirm(not a1.isId)
        self.confirm(a2.isId)
        self.confirm(not a3.isId)
        self.confirm(doc.getElementById("v") is None)
        # renaming an attribute should not affect its ID-ness:
        doc.renameNode(a2, xml.dom.EMPTY_NAMESPACE, "an")
        self.confirm(e.isSameNode(doc.getElementById("w"))
                and a2.isId)

    def testSetIdAttributeNode(self):
        NS1 = "http://xml.python.org/ns1"
        NS2 = "http://xml.python.org/ns2"
        doc = parseString("<doc"
                          " xmlns:ns1='" + NS1 + "'"
                          " xmlns:ns2='" + NS2 + "'"
                          " ns1:a1='v' ns2:a2='w'/>")
        e = doc.documentElement
        a1 = e.getAttributeNodeNS(NS1, "a1")
        a2 = e.getAttributeNodeNS(NS2, "a2")
        self.confirm(doc.getElementById("v") is None
                and not a1.isId
                and not a2.isId)
        e.setIdAttributeNode(a1)
        self.confirm(e.isSameNode(doc.getElementById("v"))
                and a1.isId
                and not a2.isId)
        e.setIdAttributeNode(a2)
        self.confirm(e.isSameNode(doc.getElementById("v"))
                and e.isSameNode(doc.getElementById("w"))
                and a1.isId
                and a2.isId)
        # replace the a1 node; the new node should *not* be an ID
        a3 = doc.createAttributeNS(NS1, "a1")
        a3.value = "v"
        e.setAttributeNode(a3)
        self.confirm(e.isSameNode(doc.getElementById("w")))
        self.confirm(not a1.isId)
        self.confirm(a2.isId)
        self.confirm(not a3.isId)
        self.confirm(doc.getElementById("v") is None)
        # renaming an attribute should not affect its ID-ness:
        doc.renameNode(a2, xml.dom.EMPTY_NAMESPACE, "an")
        self.confirm(e.isSameNode(doc.getElementById("w"))
                and a2.isId)

    def testPickledDocument(self):
        doc = parseString("<?xml version='1.0' encoding='us-ascii'?>\n"
                    "<!DOCTYPE doc PUBLIC 'http://xml.python.org/public'"
                    " 'http://xml.python.org/system' [\n"
                    "  <!ELEMENT e EMPTY>\n"
                    "  <!ENTITY ent SYSTEM 'http://xml.python.org/entity'>\n"
                    "]><doc attr='value'> text\n"
                    "<?pi sample?> <!-- comment --> <e/> </doc>")
        s = pickle.dumps(doc)
        doc2 = pickle.loads(s)
        stack = [(doc, doc2)]
        while stack:
            n1, n2 = stack.pop()
            self.confirm(n1.nodeType == n2.nodeType
                    and len(n1.childNodes) == len(n2.childNodes)
                    and n1.nodeName == n2.nodeName
                    and not n1.isSameNode(n2)
                    and not n2.isSameNode(n1))
            if n1.nodeType == Node.DOCUMENT_TYPE_NODE:
                len(n1.entities)
                len(n2.entities)
                len(n1.notations)
                len(n2.notations)
                self.confirm(len(n1.entities) == len(n2.entities)
                        and len(n1.notations) == len(n2.notations))
                for i in range(len(n1.notations)):
                    no1 = n1.notations.item(i)
                    no2 = n1.notations.item(i)
                    self.confirm(no1.name == no2.name
                            and no1.publicId == no2.publicId
                            and no1.systemId == no2.systemId)
                    statck.append((no1, no2))
                for i in range(len(n1.entities)):
                    e1 = n1.entities.item(i)
                    e2 = n2.entities.item(i)
                    self.confirm(e1.notationName == e2.notationName
                            and e1.publicId == e2.publicId
                            and e1.systemId == e2.systemId)
                    stack.append((e1, e2))
            if n1.nodeType != Node.DOCUMENT_NODE:
                self.confirm(n1.ownerDocument.isSameNode(doc)
                        and n2.ownerDocument.isSameNode(doc2))
            for i in range(len(n1.childNodes)):
                stack.append((n1.childNodes[i], n2.childNodes[i]))

    def testSerializeCommentNodeWithDoubleHyphen(self):
        doc = create_doc_without_doctype()
        doc.appendChild(doc.createComment("foo--bar"))
        self.assertRaises(ValueError, doc.toxml)

def test_main():
    run_unittest(MinidomTest)

if __name__ == "__main__":
    test_main()