python: add concept and library tests

python/ql/test/library-tests/frameworks/lxml/test.py

@@ -0,0 +1,21 @@
+from lxml import etree
+from io import StringIO
+
+def test_parse():
+    tree = etree.parse(StringIO('<foo><bar></bar></foo>'))
+    r = tree.xpath('/foo/bar')  # $ getXPath='/foo/bar'
+
+def test_XPath_class():
+    root = etree.XML("<root><a>TEXT</a></root>")
+    find_text = etree.XPath("path")  # $ constructedXPath="path"
+    text = find_text(root)[0]
+
+def test_ETXpath_class():
+    root = etree.XML("<root><a>TEXT</a></root>")
+    find_text = etree.ETXPath("path")  # $ constructedXPath="path"
+    text = find_text(root)[0]
+
+def test_XPathEvaluator_class():
+    root = etree.XML("<root><a>TEXT</a></root>")
+    search_root = etree.XPathEvaluator(root)
+    text = search_root("path")[0]  # $ MISSING: getXPath="path"