#!/usr/bin/python -u

import sys

import libxml2

#memory debug specific

libxml2.debugMemory(1)

#

# A document hosting the nodes returned from the extension function

#

mydoc = libxml2.newDoc("1.0")

def foo(ctx, str):

    global mydoc

    #

    # test returning a node set works as expected

    #

    parent = mydoc.newDocNode(None, 'p', None)

    mydoc.addChild(parent)

    node = mydoc.newDocText(str)

    parent.addChild(node)

    return [parent]

doc = libxml2.parseFile("tst.xml")

ctxt = doc.xpathNewContext()

libxml2.registerXPathFunction(ctxt._o, "foo", None, foo)

res = ctxt.xpathEval("foo('hello')")

if type(res) != type([]):

    print("Failed to return a nodeset")

    sys.exit(1)

if len(res) != 1:

    print("Unexpected nodeset size")

    sys.exit(1)

node = res[0]

if node.name != 'p':

    print("Unexpected nodeset element result")

    sys.exit(1)

node = node.children

if node.type != 'text':

    print("Unexpected nodeset element children type")

    sys.exit(1)

if node.content != 'hello':

    print("Unexpected nodeset element children content")

    sys.exit(1)

doc.freeDoc()

mydoc.freeDoc()

ctxt.xpathFreeContext()

#memory debug specific

libxml2.cleanupParser()

if libxml2.debugMemory(1) == 0:

    print("OK")

else:

    print("Memory leak %d bytes" % (libxml2.debugMemory(1)))

    libxml2.dumpMemory()