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#!/usr/bin/env python
#
# Copyright (c), 2021-2025, SISSA (International School for Advanced Studies).
# All rights reserved.
# This file is distributed under the terms of the MIT License.
# See the file 'LICENSE' in the root directory of the present
# distribution, or http://opensource.org/licenses/MIT.
#
# @author Davide Brunato <brunato@sissa.it>
#
import unittest
from copy import copy
from textwrap import dedent
from elementpath import XPath2Parser, XPathSchemaContext
from elementpath.datatypes import UntypedAtomic
try:
# noinspection PyPackageRequirements
import xmlschema
except (ImportError, AttributeError):
xmlschema = None
@unittest.skipIf(xmlschema is None, "xmlschema library required")
class XMLSchemaContextTest(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls.schema1 = xmlschema.XMLSchema(dedent('''\
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="http://xpath.test/ns" targetNamespace="http://xpath.test/ns">
<xs:element name="a">
<xs:complexType>
<xs:sequence>
<xs:element name="b1" type="xs:string" />
<xs:element name="b2" type="xs:int" />
<xs:element ref="b3"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="b3" type="xs:float"/>
</xs:schema>'''))
cls.schema2 = xmlschema.XMLSchema(dedent('''\
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="root" type="xs:string"/>
</xs:schema>'''))
def test_name_token(self):
parser = XPath2Parser(default_namespace="http://xpath.test/ns")
schema_context = XPathSchemaContext(self.schema1)
elem_a = self.schema1.elements['a']
token = parser.parse('a')
context = copy(schema_context)
element_node = context.root[0]
self.assertIs(element_node.elem, elem_a)
self.assertIs(element_node.xsd_type, elem_a.type)
result = token.evaluate(context)
self.assertEqual(result, [element_node])
elem_b1 = elem_a.type.content[0]
token = parser.parse('a/b1')
context = copy(schema_context)
element_node = context.root[0][0]
self.assertIs(element_node.elem, elem_b1)
self.assertIs(element_node.xsd_type, elem_b1.type)
result = token.evaluate(context)
self.assertEqual(result, [element_node])
def test_colon_token(self):
parser = XPath2Parser(namespaces={'tst': "http://xpath.test/ns"})
context = XPathSchemaContext(self.schema1)
token = parser.parse('tst:a')
self.assertEqual(token.symbol, ':')
result = token.evaluate(copy(context))
self.assertEqual(result, [context.root[0]])
token = parser.parse('tst:a/b1')
self.assertEqual(token.symbol, '/')
self.assertEqual(token[0].symbol, ':')
result = token.evaluate(copy(context))
self.assertEqual(result, [context.root[0][0]])
token = parser.parse('tst:a/tst:b1')
result = token.evaluate(copy(context))
self.assertEqual(result, [])
token = parser.parse('tst:a/tst:b3')
self.assertEqual(token.symbol, '/')
self.assertEqual(token[0].symbol, ':')
result = token.evaluate(copy(context))
self.assertEqual(result, [context.root[0][2]])
def test_extended_name_token(self):
parser = XPath2Parser(strict=False)
context = XPathSchemaContext(self.schema1)
token = parser.parse('{http://xpath.test/ns}a')
self.assertEqual(token.symbol, '{')
self.assertEqual(token[0].symbol, '(string)')
self.assertEqual(token[1].symbol, '(name)')
self.assertEqual(token[1].value, 'a')
result = token.evaluate(context)
self.assertEqual(result, [context.root[0]])
def test_wildcard_token(self):
parser = XPath2Parser(default_namespace="http://xpath.test/ns")
context = XPathSchemaContext(self.schema1)
elem_a = self.schema1.elements['a']
elem_b3 = self.schema1.elements['b3']
token = parser.parse('*')
self.assertEqual(token.symbol, '*')
result = token.evaluate(context)
self.assertEqual([e.value for e in result], [elem_a, elem_b3])
token = parser.parse('a/*')
self.assertEqual(token.symbol, '/')
self.assertEqual(token[0].symbol, '(name)')
self.assertEqual(token[1].symbol, '*')
result = token.evaluate(context)
self.assertEqual([e.value for e in result], elem_a.type.content[:])
def test_dot_shortcut_token(self):
parser = XPath2Parser(default_namespace="http://xpath.test/ns")
context = XPathSchemaContext(self.schema1)
token = parser.parse('.')
result = token.evaluate(context)
self.assertEqual(result, context.root)
context = XPathSchemaContext(self.schema1, item=self.schema1)
token = parser.parse('.')
result = token.evaluate(context)
self.assertEqual(result, context.root)
context = XPathSchemaContext(self.schema1, item=self.schema2)
schema2_node = context.item
token = parser.parse('.')
result = token.evaluate(context)
self.assertEqual(result, schema2_node)
def test_schema_variables(self):
variable_types = {'a': 'item()', 'b': 'xs:integer?', 'c': 'xs:string'}
parser = XPath2Parser(
default_namespace="http://xpath.test/ns",
variable_types=variable_types,
schema=self.schema1.xpath_proxy,
)
context = XPathSchemaContext(self.schema1)
token = parser.parse('$a')
result = token.evaluate(context)
self.assertIsInstance(result, UntypedAtomic)
self.assertEqual(result.value, '1')
token = parser.parse('$b')
result = token.evaluate(context)
self.assertIsInstance(result, int)
self.assertEqual(result, 1)
token = parser.parse('$c')
result = token.evaluate(context)
self.assertIsInstance(result, str)
self.assertEqual(result, ' alpha\t')
token = parser.parse('$z')
self.assertEqual(token.evaluate(context), [])
def test_not_applicable_functions(self):
parser = XPath2Parser(default_namespace="http://xpath.test/ns")
context = XPathSchemaContext(self.schema1)
token = parser.parse("fn:collection('filepath')")
self.assertEqual(token.evaluate(context), [])
token = parser.parse("fn:doc-available('tns1')")
self.assertFalse(token.evaluate(context))
token = parser.parse("fn:root(.)")
self.assertEqual(token.evaluate(context), [])
token = parser.parse("fn:id('ID21256')")
self.assertEqual(token.evaluate(context), [])
token = parser.parse("fn:idref('ID21256')")
self.assertEqual(token.evaluate(context), [])
def test_if_statement(self):
parser = XPath2Parser(default_namespace="http://xpath.test/ns")
context = XPathSchemaContext(self.schema1)
token = parser.parse('if ($x > 1) then a/b1 else a/b2')
result = token.evaluate(context)
self.assertEqual(result, [context.root[0][1]])
token = parser.parse('if ($x > xs:date("2010-01-01")) then a/b1 else a/b2')
result = token.evaluate(context)
self.assertEqual(result, [context.root[0][1]])
if __name__ == '__main__':
unittest.main()
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