[libxml2]Add libxml2 library

libxml2/python/tests/xpathext.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+import sys
+import setup_test
+import libxml2
+
+# Memory debug specific
+libxml2.debugMemory(1)
+
+def foo(ctx, x):
+    return x + 1
+
+def bar(ctx, x):
+    return "%d" % (x + 2)
+
+doc = libxml2.parseFile("tst.xml")
+ctxt = doc.xpathNewContext()
+res = ctxt.xpathEval("//*")
+if len(res) != 2:
+    print("xpath query: wrong node set size")
+    sys.exit(1)
+if res[0].name != "doc" or res[1].name != "foo":
+    print("xpath query: wrong node set value")
+    sys.exit(1)
+
+libxml2.registerXPathFunction(ctxt._o, "foo", None, foo)
+libxml2.registerXPathFunction(ctxt._o, "bar", None, bar)
+i = 10000
+while i > 0:
+    res = ctxt.xpathEval("foo(1)")
+    if res != 2:
+        print("xpath extension failure")
+        sys.exit(1)
+    i = i - 1
+i = 10000
+while i > 0:
+    res = ctxt.xpathEval("bar(1)")
+    if res != "3":
+        print("xpath extension failure got %s expecting '3'")
+        sys.exit(1)
+    i = i - 1
+doc.freeDoc()
+ctxt.xpathFreeContext()
+
+# Memory debug specific
+libxml2.cleanupParser()
+if libxml2.debugMemory(1) == 0:
+    print("OK")
+else:
+    print("Memory leak %d bytes" % (libxml2.debugMemory(1)))