Merging upstream version 2024.04.09.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4 insertions, 379 deletions

diff --git a/test/test_utils.py b/test/test_utils.py
index a3073f0..ddf0a7c 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -2,7 +2,6 @@
 
 # Allow direct execution
 import os
-import re
 import sys
 import unittest
 import warnings
@@ -45,7 +44,6 @@ from yt_dlp.utils import (
     determine_ext,
     determine_file_encoding,
     dfxp2srt,
-    dict_get,
     encode_base_n,
     encode_compat_str,
     encodeFilename,
@@ -106,13 +104,11 @@ from yt_dlp.utils import (
     sanitize_url,
     shell_quote,
     smuggle_url,
-    str_or_none,
     str_to_int,
     strip_jsonp,
     strip_or_none,
     subtitles_filename,
     timeconvert,
-    traverse_obj,
     try_call,
     unescapeHTML,
     unified_strdate,
@@ -755,28 +751,6 @@ class TestUtil(unittest.TestCase):
         self.assertRaises(
             ValueError, multipart_encode, {b'field': b'value'}, boundary='value')
 
-    def test_dict_get(self):
-        FALSE_VALUES = {
-            'none': None,
-            'false': False,
-            'zero': 0,
-            'empty_string': '',
-            'empty_list': [],
-        }
-        d = FALSE_VALUES.copy()
-        d['a'] = 42
-        self.assertEqual(dict_get(d, 'a'), 42)
-        self.assertEqual(dict_get(d, 'b'), None)
-        self.assertEqual(dict_get(d, 'b', 42), 42)
-        self.assertEqual(dict_get(d, ('a', )), 42)
-        self.assertEqual(dict_get(d, ('b', 'a', )), 42)
-        self.assertEqual(dict_get(d, ('b', 'c', 'a', 'd', )), 42)
-        self.assertEqual(dict_get(d, ('b', 'c', )), None)
-        self.assertEqual(dict_get(d, ('b', 'c', ), 42), 42)
-        for key, false_value in FALSE_VALUES.items():
-            self.assertEqual(dict_get(d, ('b', 'c', key, )), None)
-            self.assertEqual(dict_get(d, ('b', 'c', key, ), skip_false_values=False), false_value)
-
     def test_merge_dicts(self):
         self.assertEqual(merge_dicts({'a': 1}, {'b': 2}), {'a': 1, 'b': 2})
         self.assertEqual(merge_dicts({'a': 1}, {'a': 2}), {'a': 1})
@@ -2039,359 +2013,6 @@ Line 1
             warnings.simplefilter('ignore')
             self.assertEqual(variadic('spam', allowed_types=[dict]), 'spam')
 
-    def test_traverse_obj(self):
-        _TEST_DATA = {
-            100: 100,
-            1.2: 1.2,
-            'str': 'str',
-            'None': None,
-            '...': ...,
-            'urls': [
-                {'index': 0, 'url': 'https://www.example.com/0'},
-                {'index': 1, 'url': 'https://www.example.com/1'},
-            ],
-            'data': (
-                {'index': 2},
-                {'index': 3},
-            ),
-            'dict': {},
-        }
-
-        # Test base functionality
-        self.assertEqual(traverse_obj(_TEST_DATA, ('str',)), 'str',
-                         msg='allow tuple path')
-        self.assertEqual(traverse_obj(_TEST_DATA, ['str']), 'str',
-                         msg='allow list path')
-        self.assertEqual(traverse_obj(_TEST_DATA, (value for value in ("str",))), 'str',
-                         msg='allow iterable path')
-        self.assertEqual(traverse_obj(_TEST_DATA, 'str'), 'str',
-                         msg='single items should be treated as a path')
-        self.assertEqual(traverse_obj(_TEST_DATA, None), _TEST_DATA)
-        self.assertEqual(traverse_obj(_TEST_DATA, 100), 100)
-        self.assertEqual(traverse_obj(_TEST_DATA, 1.2), 1.2)
-
-        # Test Ellipsis behavior
-        self.assertCountEqual(traverse_obj(_TEST_DATA, ...),
-                              (item for item in _TEST_DATA.values() if item not in (None, {})),
-                              msg='`...` should give all non discarded values')
-        self.assertCountEqual(traverse_obj(_TEST_DATA, ('urls', 0, ...)), _TEST_DATA['urls'][0].values(),
-                              msg='`...` selection for dicts should select all values')
-        self.assertEqual(traverse_obj(_TEST_DATA, (..., ..., 'url')),
-                         ['https://www.example.com/0', 'https://www.example.com/1'],
-                         msg='nested `...` queries should work')
-        self.assertCountEqual(traverse_obj(_TEST_DATA, (..., ..., 'index')), range(4),
-                              msg='`...` query result should be flattened')
-        self.assertEqual(traverse_obj(iter(range(4)), ...), list(range(4)),
-                         msg='`...` should accept iterables')
-
-        # Test function as key
-        self.assertEqual(traverse_obj(_TEST_DATA, lambda x, y: x == 'urls' and isinstance(y, list)),
-                         [_TEST_DATA['urls']],
-                         msg='function as query key should perform a filter based on (key, value)')
-        self.assertCountEqual(traverse_obj(_TEST_DATA, lambda _, x: isinstance(x[0], str)), {'str'},
-                              msg='exceptions in the query function should be catched')
-        self.assertEqual(traverse_obj(iter(range(4)), lambda _, x: x % 2 == 0), [0, 2],
-                         msg='function key should accept iterables')
-        if __debug__:
-            with self.assertRaises(Exception, msg='Wrong function signature should raise in debug'):
-                traverse_obj(_TEST_DATA, lambda a: ...)
-            with self.assertRaises(Exception, msg='Wrong function signature should raise in debug'):
-                traverse_obj(_TEST_DATA, lambda a, b, c: ...)
-
-        # Test set as key (transformation/type, like `expected_type`)
-        self.assertEqual(traverse_obj(_TEST_DATA, (..., {str.upper}, )), ['STR'],
-                         msg='Function in set should be a transformation')
-        self.assertEqual(traverse_obj(_TEST_DATA, (..., {str})), ['str'],
-                         msg='Type in set should be a type filter')
-        self.assertEqual(traverse_obj(_TEST_DATA, {dict}), _TEST_DATA,
-                         msg='A single set should be wrapped into a path')
-        self.assertEqual(traverse_obj(_TEST_DATA, (..., {str.upper})), ['STR'],
-                         msg='Transformation function should not raise')
-        self.assertEqual(traverse_obj(_TEST_DATA, (..., {str_or_none})),
-                         [item for item in map(str_or_none, _TEST_DATA.values()) if item is not None],
-                         msg='Function in set should be a transformation')
-        self.assertEqual(traverse_obj(_TEST_DATA, ('fail', {lambda _: 'const'})), 'const',
-                         msg='Function in set should always be called')
-        if __debug__:
-            with self.assertRaises(Exception, msg='Sets with length != 1 should raise in debug'):
-                traverse_obj(_TEST_DATA, set())
-            with self.assertRaises(Exception, msg='Sets with length != 1 should raise in debug'):
-                traverse_obj(_TEST_DATA, {str.upper, str})
-
-        # Test `slice` as a key
-        _SLICE_DATA = [0, 1, 2, 3, 4]
-        self.assertEqual(traverse_obj(_TEST_DATA, ('dict', slice(1))), None,
-                         msg='slice on a dictionary should not throw')
-        self.assertEqual(traverse_obj(_SLICE_DATA, slice(1)), _SLICE_DATA[:1],
-                         msg='slice key should apply slice to sequence')
-        self.assertEqual(traverse_obj(_SLICE_DATA, slice(1, 2)), _SLICE_DATA[1:2],
-                         msg='slice key should apply slice to sequence')
-        self.assertEqual(traverse_obj(_SLICE_DATA, slice(1, 4, 2)), _SLICE_DATA[1:4:2],
-                         msg='slice key should apply slice to sequence')
-
-        # Test alternative paths
-        self.assertEqual(traverse_obj(_TEST_DATA, 'fail', 'str'), 'str',
-                         msg='multiple `paths` should be treated as alternative paths')
-        self.assertEqual(traverse_obj(_TEST_DATA, 'str', 100), 'str',
-                         msg='alternatives should exit early')
-        self.assertEqual(traverse_obj(_TEST_DATA, 'fail', 'fail'), None,
-                         msg='alternatives should return `default` if exhausted')
-        self.assertEqual(traverse_obj(_TEST_DATA, (..., 'fail'), 100), 100,
-                         msg='alternatives should track their own branching return')
-        self.assertEqual(traverse_obj(_TEST_DATA, ('dict', ...), ('data', ...)), list(_TEST_DATA['data']),
-                         msg='alternatives on empty objects should search further')
-
-        # Test branch and path nesting
-        self.assertEqual(traverse_obj(_TEST_DATA, ('urls', (3, 0), 'url')), ['https://www.example.com/0'],
-                         msg='tuple as key should be treated as branches')
-        self.assertEqual(traverse_obj(_TEST_DATA, ('urls', [3, 0], 'url')), ['https://www.example.com/0'],
-                         msg='list as key should be treated as branches')
-        self.assertEqual(traverse_obj(_TEST_DATA, ('urls', ((1, 'fail'), (0, 'url')))), ['https://www.example.com/0'],
-                         msg='double nesting in path should be treated as paths')
-        self.assertEqual(traverse_obj(['0', [1, 2]], [(0, 1), 0]), [1],
-                         msg='do not fail early on branching')
-        self.assertCountEqual(traverse_obj(_TEST_DATA, ('urls', ((1, ('fail', 'url')), (0, 'url')))),
-                              ['https://www.example.com/0', 'https://www.example.com/1'],
-                              msg='tripple nesting in path should be treated as branches')
-        self.assertEqual(traverse_obj(_TEST_DATA, ('urls', ('fail', (..., 'url')))),
-                         ['https://www.example.com/0', 'https://www.example.com/1'],
-                         msg='ellipsis as branch path start gets flattened')
-
-        # Test dictionary as key
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: 100, 1: 1.2}), {0: 100, 1: 1.2},
-                         msg='dict key should result in a dict with the same keys')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: ('urls', 0, 'url')}),
-                         {0: 'https://www.example.com/0'},
-                         msg='dict key should allow paths')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: ('urls', (3, 0), 'url')}),
-                         {0: ['https://www.example.com/0']},
-                         msg='tuple in dict path should be treated as branches')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: ('urls', ((1, 'fail'), (0, 'url')))}),
-                         {0: ['https://www.example.com/0']},
-                         msg='double nesting in dict path should be treated as paths')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: ('urls', ((1, ('fail', 'url')), (0, 'url')))}),
-                         {0: ['https://www.example.com/1', 'https://www.example.com/0']},
-                         msg='tripple nesting in dict path should be treated as branches')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: 'fail'}), {},
-                         msg='remove `None` values when top level dict key fails')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: 'fail'}, default=...), {0: ...},
-                         msg='use `default` if key fails and `default`')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: 'dict'}), {},
-                         msg='remove empty values when dict key')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: 'dict'}, default=...), {0: ...},
-                         msg='use `default` when dict key and `default`')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: {0: 'fail'}}), {},
-                         msg='remove empty values when nested dict key fails')
-        self.assertEqual(traverse_obj(None, {0: 'fail'}), {},
-                         msg='default to dict if pruned')
-        self.assertEqual(traverse_obj(None, {0: 'fail'}, default=...), {0: ...},
-                         msg='default to dict if pruned and default is given')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: {0: 'fail'}}, default=...), {0: {0: ...}},
-                         msg='use nested `default` when nested dict key fails and `default`')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: ('dict', ...)}), {},
-                         msg='remove key if branch in dict key not successful')
-
-        # Testing default parameter behavior
-        _DEFAULT_DATA = {'None': None, 'int': 0, 'list': []}
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, 'fail'), None,
-                         msg='default value should be `None`')
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, 'fail', 'fail', default=...), ...,
-                         msg='chained fails should result in default')
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, 'None', 'int'), 0,
-                         msg='should not short cirquit on `None`')
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, 'fail', default=1), 1,
-                         msg='invalid dict key should result in `default`')
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, 'None', default=1), 1,
-                         msg='`None` is a deliberate sentinel and should become `default`')
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, ('list', 10)), None,
-                         msg='`IndexError` should result in `default`')
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, (..., 'fail'), default=1), 1,
-                         msg='if branched but not successful return `default` if defined, not `[]`')
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, (..., 'fail'), default=None), None,
-                         msg='if branched but not successful return `default` even if `default` is `None`')
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, (..., 'fail')), [],
-                         msg='if branched but not successful return `[]`, not `default`')
-        self.assertEqual(traverse_obj(_DEFAULT_DATA, ('list', ...)), [],
-                         msg='if branched but object is empty return `[]`, not `default`')
-        self.assertEqual(traverse_obj(None, ...), [],
-                         msg='if branched but object is `None` return `[]`, not `default`')
-        self.assertEqual(traverse_obj({0: None}, (0, ...)), [],
-                         msg='if branched but state is `None` return `[]`, not `default`')
-
-        branching_paths = [
-            ('fail', ...),
-            (..., 'fail'),
-            100 * ('fail',) + (...,),
-            (...,) + 100 * ('fail',),
-        ]
-        for branching_path in branching_paths:
-            self.assertEqual(traverse_obj({}, branching_path), [],
-                             msg='if branched but state is `None`, return `[]` (not `default`)')
-            self.assertEqual(traverse_obj({}, 'fail', branching_path), [],
-                             msg='if branching in last alternative and previous did not match, return `[]` (not `default`)')
-            self.assertEqual(traverse_obj({0: 'x'}, 0, branching_path), 'x',
-                             msg='if branching in last alternative and previous did match, return single value')
-            self.assertEqual(traverse_obj({0: 'x'}, branching_path, 0), 'x',
-                             msg='if branching in first alternative and non-branching path does match, return single value')
-            self.assertEqual(traverse_obj({}, branching_path, 'fail'), None,
-                             msg='if branching in first alternative and non-branching path does not match, return `default`')
-
-        # Testing expected_type behavior
-        _EXPECTED_TYPE_DATA = {'str': 'str', 'int': 0}
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'str', expected_type=str),
-                         'str', msg='accept matching `expected_type` type')
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'str', expected_type=int),
-                         None, msg='reject non matching `expected_type` type')
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'int', expected_type=lambda x: str(x)),
-                         '0', msg='transform type using type function')
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'str', expected_type=lambda _: 1 / 0),
-                         None, msg='wrap expected_type fuction in try_call')
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, ..., expected_type=str),
-                         ['str'], msg='eliminate items that expected_type fails on')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: 100, 1: 1.2}, expected_type=int),
-                         {0: 100}, msg='type as expected_type should filter dict values')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: 100, 1: 1.2, 2: 'None'}, expected_type=str_or_none),
-                         {0: '100', 1: '1.2'}, msg='function as expected_type should transform dict values')
-        self.assertEqual(traverse_obj(_TEST_DATA, ({0: 1.2}, 0, {int_or_none}), expected_type=int),
-                         1, msg='expected_type should not filter non final dict values')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: {0: 100, 1: 'str'}}, expected_type=int),
-                         {0: {0: 100}}, msg='expected_type should transform deep dict values')
-        self.assertEqual(traverse_obj(_TEST_DATA, [({0: '...'}, {0: '...'})], expected_type=type(...)),
-                         [{0: ...}, {0: ...}], msg='expected_type should transform branched dict values')
-        self.assertEqual(traverse_obj({1: {3: 4}}, [(1, 2), 3], expected_type=int),
-                         [4], msg='expected_type regression for type matching in tuple branching')
-        self.assertEqual(traverse_obj(_TEST_DATA, ['data', ...], expected_type=int),
-                         [], msg='expected_type regression for type matching in dict result')
-
-        # Test get_all behavior
-        _GET_ALL_DATA = {'key': [0, 1, 2]}
-        self.assertEqual(traverse_obj(_GET_ALL_DATA, ('key', ...), get_all=False), 0,
-                         msg='if not `get_all`, return only first matching value')
-        self.assertEqual(traverse_obj(_GET_ALL_DATA, ..., get_all=False), [0, 1, 2],
-                         msg='do not overflatten if not `get_all`')
-
-        # Test casesense behavior
-        _CASESENSE_DATA = {
-            'KeY': 'value0',
-            0: {
-                'KeY': 'value1',
-                0: {'KeY': 'value2'},
-            },
-        }
-        self.assertEqual(traverse_obj(_CASESENSE_DATA, 'key'), None,
-                         msg='dict keys should be case sensitive unless `casesense`')
-        self.assertEqual(traverse_obj(_CASESENSE_DATA, 'keY',
-                                      casesense=False), 'value0',
-                         msg='allow non matching key case if `casesense`')
-        self.assertEqual(traverse_obj(_CASESENSE_DATA, (0, ('keY',)),
-                                      casesense=False), ['value1'],
-                         msg='allow non matching key case in branch if `casesense`')
-        self.assertEqual(traverse_obj(_CASESENSE_DATA, (0, ((0, 'keY'),)),
-                                      casesense=False), ['value2'],
-                         msg='allow non matching key case in branch path if `casesense`')
-
-        # Test traverse_string behavior
-        _TRAVERSE_STRING_DATA = {'str': 'str', 1.2: 1.2}
-        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', 0)), None,
-                         msg='do not traverse into string if not `traverse_string`')
-        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', 0),
-                                      traverse_string=True), 's',
-                         msg='traverse into string if `traverse_string`')
-        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, (1.2, 1),
-                                      traverse_string=True), '.',
-                         msg='traverse into converted data if `traverse_string`')
-        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', ...),
-                                      traverse_string=True), 'str',
-                         msg='`...` should result in string (same value) if `traverse_string`')
-        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', slice(0, None, 2)),
-                                      traverse_string=True), 'sr',
-                         msg='`slice` should result in string if `traverse_string`')
-        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', lambda i, v: i or v == "s"),
-                                      traverse_string=True), 'str',
-                         msg='function should result in string if `traverse_string`')
-        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', (0, 2)),
-                                      traverse_string=True), ['s', 'r'],
-                         msg='branching should result in list if `traverse_string`')
-        self.assertEqual(traverse_obj({}, (0, ...), traverse_string=True), [],
-                         msg='branching should result in list if `traverse_string`')
-        self.assertEqual(traverse_obj({}, (0, lambda x, y: True), traverse_string=True), [],
-                         msg='branching should result in list if `traverse_string`')
-        self.assertEqual(traverse_obj({}, (0, slice(1)), traverse_string=True), [],
-                         msg='branching should result in list if `traverse_string`')
-
-        # Test re.Match as input obj
-        mobj = re.fullmatch(r'0(12)(?P<group>3)(4)?', '0123')
-        self.assertEqual(traverse_obj(mobj, ...), [x for x in mobj.groups() if x is not None],
-                         msg='`...` on a `re.Match` should give its `groups()`')
-        self.assertEqual(traverse_obj(mobj, lambda k, _: k in (0, 2)), ['0123', '3'],
-                         msg='function on a `re.Match` should give groupno, value starting at 0')
-        self.assertEqual(traverse_obj(mobj, 'group'), '3',
-                         msg='str key on a `re.Match` should give group with that name')
-        self.assertEqual(traverse_obj(mobj, 2), '3',
-                         msg='int key on a `re.Match` should give group with that name')
-        self.assertEqual(traverse_obj(mobj, 'gRoUp', casesense=False), '3',
-                         msg='str key on a `re.Match` should respect casesense')
-        self.assertEqual(traverse_obj(mobj, 'fail'), None,
-                         msg='failing str key on a `re.Match` should return `default`')
-        self.assertEqual(traverse_obj(mobj, 'gRoUpS', casesense=False), None,
-                         msg='failing str key on a `re.Match` should return `default`')
-        self.assertEqual(traverse_obj(mobj, 8), None,
-                         msg='failing int key on a `re.Match` should return `default`')
-        self.assertEqual(traverse_obj(mobj, lambda k, _: k in (0, 'group')), ['0123', '3'],
-                         msg='function on a `re.Match` should give group name as well')
-
-        # Test xml.etree.ElementTree.Element as input obj
-        etree = xml.etree.ElementTree.fromstring('''<?xml version="1.0"?>
-        <data>
-            <country name="Liechtenstein">
-                <rank>1</rank>
-                <year>2008</year>
-                <gdppc>141100</gdppc>
-                <neighbor name="Austria" direction="E"/>
-                <neighbor name="Switzerland" direction="W"/>
-            </country>
-            <country name="Singapore">
-                <rank>4</rank>
-                <year>2011</year>
-                <gdppc>59900</gdppc>
-                <neighbor name="Malaysia" direction="N"/>
-            </country>
-            <country name="Panama">
-                <rank>68</rank>
-                <year>2011</year>
-                <gdppc>13600</gdppc>
-                <neighbor name="Costa Rica" direction="W"/>
-                <neighbor name="Colombia" direction="E"/>
-            </country>
-        </data>''')
-        self.assertEqual(traverse_obj(etree, ''), etree,
-                         msg='empty str key should return the element itself')
-        self.assertEqual(traverse_obj(etree, 'country'), list(etree),
-                         msg='str key should lead all children with that tag name')
-        self.assertEqual(traverse_obj(etree, ...), list(etree),
-                         msg='`...` as key should return all children')
-        self.assertEqual(traverse_obj(etree, lambda _, x: x[0].text == '4'), [etree[1]],
-                         msg='function as key should get element as value')
-        self.assertEqual(traverse_obj(etree, lambda i, _: i == 1), [etree[1]],
-                         msg='function as key should get index as key')
-        self.assertEqual(traverse_obj(etree, 0), etree[0],
-                         msg='int key should return the nth child')
-        self.assertEqual(traverse_obj(etree, './/neighbor/@name'),
-                         ['Austria', 'Switzerland', 'Malaysia', 'Costa Rica', 'Colombia'],
-                         msg='`@<attribute>` at end of path should give that attribute')
-        self.assertEqual(traverse_obj(etree, '//neighbor/@fail'), [None, None, None, None, None],
-                         msg='`@<nonexistant>` at end of path should give `None`')
-        self.assertEqual(traverse_obj(etree, ('//neighbor/@', 2)), {'name': 'Malaysia', 'direction': 'N'},
-                         msg='`@` should give the full attribute dict')
-        self.assertEqual(traverse_obj(etree, '//year/text()'), ['2008', '2011', '2011'],
-                         msg='`text()` at end of path should give the inner text')
-        self.assertEqual(traverse_obj(etree, '//*[@direction]/@direction'), ['E', 'W', 'N', 'W', 'E'],
-                         msg='full Python xpath features should be supported')
-        self.assertEqual(traverse_obj(etree, (0, '@name')), 'Liechtenstein',
-                         msg='special transformations should act on current element')
-        self.assertEqual(traverse_obj(etree, ('country', 0, ..., 'text()', {int_or_none})), [1, 2008, 141100],
-                         msg='special transformations should act on current element')
-
     def test_http_header_dict(self):
         headers = HTTPHeaderDict()
         headers['ytdl-test'] = b'0'
@@ -2448,6 +2069,10 @@ Line 1
 
         # Test escaping
         assert run_shell(['echo', 'test"&']) == '"test""&"\n'
+        assert run_shell(['echo', '%CMDCMDLINE:~-1%&']) == '"%CMDCMDLINE:~-1%&"\n'
+        assert run_shell(['echo', 'a\nb']) == '"a"\n"b"\n'
+        assert run_shell(['echo', '"']) == '""""\n'
+        assert run_shell(['echo', '\\']) == '\\\n'
         # Test if delayed expansion is disabled
         assert run_shell(['echo', '^!']) == '"^!"\n'
         assert run_shell('echo "^!"') == '"^!"\n'