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import os
import pathlib
import unittest
from testpath.asserts import *
from testpath.tempdir import TemporaryDirectory
class TestAssertFunctions(unittest.TestCase):
def setUp(self):
self.td = TemporaryDirectory()
self.addCleanup(self.td.cleanup)
self.file_path = os.path.join(self.td.name, 'afile')
with open(self.file_path, 'w') as f:
f.write('Blah')
self.dir_path = os.path.join(self.td.name, 'adir')
os.mkdir(self.dir_path)
self.link_path = os.path.join(self.td.name, 'alink')
if os.name == 'posix':
# Symlinks are rarely usable on Windows, because a special
# permission is needed to create them.
os.symlink(self.file_path, self.link_path)
self.nonexistant_path = os.path.join(self.td.name, 'doesntexist')
def test_exists(self):
assert_path_exists(self.file_path)
assert_path_exists(pathlib.Path(self.file_path))
assert_not_path_exists(self.nonexistant_path)
with self.assertRaises(AssertionError):
assert_path_exists(self.nonexistant_path)
with self.assertRaises(AssertionError):
assert_not_path_exists(self.file_path)
def test_isfile(self):
assert_isfile(self.file_path)
assert_not_isfile(self.dir_path)
with self.assertRaises(AssertionError):
assert_isfile(self.dir_path)
with self.assertRaises(AssertionError):
assert_not_isfile(self.file_path)
def test_isfile_symlink(self):
if os.name == 'nt':
raise unittest.SkipTest('symlink')
assert_isfile(self.link_path) # Follows the link by default
assert_not_isfile(self.link_path, follow_symlinks=False)
with self.assertRaises(AssertionError):
assert_isfile(self.link_path, follow_symlinks=False)
with self.assertRaises(AssertionError):
assert_not_isfile(self.link_path)
def test_isdir(self):
assert_isdir(self.dir_path)
assert_isdir(pathlib.Path(self.dir_path))
assert_not_isdir(self.file_path)
with self.assertRaises(AssertionError):
assert_isdir(self.file_path)
with self.assertRaises(AssertionError):
assert_not_isdir(self.dir_path)
def test_islink(self):
if os.name == 'nt':
raise unittest.SkipTest('symlink')
assert_islink(self.link_path, to=self.file_path)
assert_islink(pathlib.Path(self.link_path),
to=pathlib.Path(self.file_path))
assert_not_islink(self.file_path)
with self.assertRaises(AssertionError) as c:
assert_islink(self.file_path)
self.assertIn('not a symlink', str(c.exception))
with self.assertRaises(AssertionError) as c:
assert_islink(self.link_path, to=self.dir_path)
self.assertIn('target of', str(c.exception))
with self.assertRaises(AssertionError):
assert_not_islink(self.link_path)
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