1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
from .. import util
from . import util as import_util
importlib = util.import_importlib('importlib')
machinery = util.import_importlib('importlib.machinery')
import os
import sys
from types import ModuleType
import unittest
import warnings
import zipimport
class FinderTests:
"""Tests for PathFinder."""
def test_failure(self):
# Test None returned upon not finding a suitable loader.
module = '<test module>'
with util.import_state():
self.assertIsNone(self.machinery.PathFinder.find_module(module))
def test_sys_path(self):
# Test that sys.path is used when 'path' is None.
# Implicitly tests that sys.path_importer_cache is used.
module = '<test module>'
path = '<test path>'
importer = util.mock_spec(module)
with util.import_state(path_importer_cache={path: importer},
path=[path]):
loader = self.machinery.PathFinder.find_module(module)
self.assertIs(loader, importer)
def test_path(self):
# Test that 'path' is used when set.
# Implicitly tests that sys.path_importer_cache is used.
module = '<test module>'
path = '<test path>'
importer = util.mock_spec(module)
with util.import_state(path_importer_cache={path: importer}):
loader = self.machinery.PathFinder.find_module(module, [path])
self.assertIs(loader, importer)
def test_empty_list(self):
# An empty list should not count as asking for sys.path.
module = 'module'
path = '<test path>'
importer = util.mock_spec(module)
with util.import_state(path_importer_cache={path: importer},
path=[path]):
self.assertIsNone(self.machinery.PathFinder.find_module('module', []))
def test_path_hooks(self):
# Test that sys.path_hooks is used.
# Test that sys.path_importer_cache is set.
module = '<test module>'
path = '<test path>'
importer = util.mock_spec(module)
hook = import_util.mock_path_hook(path, importer=importer)
with util.import_state(path_hooks=[hook]):
loader = self.machinery.PathFinder.find_module(module, [path])
self.assertIs(loader, importer)
self.assertIn(path, sys.path_importer_cache)
self.assertIs(sys.path_importer_cache[path], importer)
def test_empty_path_hooks(self):
# Test that if sys.path_hooks is empty a warning is raised,
# sys.path_importer_cache gets None set, and PathFinder returns None.
path_entry = 'bogus_path'
with util.import_state(path_importer_cache={}, path_hooks=[],
path=[path_entry]):
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter('always')
self.assertIsNone(self.machinery.PathFinder.find_module('os'))
self.assertIsNone(sys.path_importer_cache[path_entry])
self.assertEqual(len(w), 1)
self.assertTrue(issubclass(w[-1].category, ImportWarning))
def test_path_importer_cache_empty_string(self):
# The empty string should create a finder using the cwd.
path = ''
module = '<test module>'
importer = util.mock_spec(module)
hook = import_util.mock_path_hook(os.getcwd(), importer=importer)
with util.import_state(path=[path], path_hooks=[hook]):
loader = self.machinery.PathFinder.find_module(module)
self.assertIs(loader, importer)
self.assertIn(os.getcwd(), sys.path_importer_cache)
def test_None_on_sys_path(self):
# Putting None in sys.path[0] caused an import regression from Python
# 3.2: http://bugs.python.org/issue16514
new_path = sys.path[:]
new_path.insert(0, None)
new_path_importer_cache = sys.path_importer_cache.copy()
new_path_importer_cache.pop(None, None)
new_path_hooks = [zipimport.zipimporter,
self.machinery.FileFinder.path_hook(
*self.importlib._bootstrap._get_supported_file_loaders())]
missing = object()
email = sys.modules.pop('email', missing)
try:
with util.import_state(meta_path=sys.meta_path[:],
path=new_path,
path_importer_cache=new_path_importer_cache,
path_hooks=new_path_hooks):
module = self.importlib.import_module('email')
self.assertIsInstance(module, ModuleType)
finally:
if email is not missing:
sys.modules['email'] = email
Frozen_FinderTests, Source_FinderTests = util.test_both(
FinderTests, importlib=importlib, machinery=machinery)
class PathEntryFinderTests:
def test_finder_with_failing_find_module(self):
# PathEntryFinder with find_module() defined should work.
# Issue #20763.
class Finder:
path_location = 'test_finder_with_find_module'
def __init__(self, path):
if path != self.path_location:
raise ImportError
@staticmethod
def find_module(fullname):
return None
with util.import_state(path=[Finder.path_location]+sys.path[:],
path_hooks=[Finder]):
self.machinery.PathFinder.find_spec('importlib')
Frozen_PEFTests, Source_PEFTests = util.test_both(
PathEntryFinderTests, machinery=machinery)
if __name__ == '__main__':
unittest.main()
|