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import errno
import os
import unittest
import pytest
from trashcli.fs import (
atomic_write,
open_for_write_in_exclusive_and_create_mode,
read_file,
)
from tests.support.dirs.my_path import MyPath
@pytest.mark.slow
class Test_atomic_write(unittest.TestCase):
def setUp(self):
self.temp_dir = MyPath.make_temp_dir()
def test_the_second_open_should_fail(self):
path = self.temp_dir / "a"
file_handle = open_for_write_in_exclusive_and_create_mode(path)
try:
open_for_write_in_exclusive_and_create_mode(path)
self.fail()
except OSError as e:
assert e.errno == errno.EEXIST
os.close(file_handle)
def test_short_filename(self):
path = self.temp_dir / 'a'
atomic_write(path, b'contents')
assert 'contents' == read_file(path)
def test_too_long_filename(self):
path = self.temp_dir / ('a' * 2000)
try:
atomic_write(path, b'contents')
self.fail()
except OSError as e:
assert e.errno == errno.ENAMETOOLONG
def test_filename_already_taken(self):
atomic_write(self.temp_dir / "a", b'contents')
try:
atomic_write(self.temp_dir / "a", b'contents')
self.fail()
except OSError as e:
assert e.errno == errno.EEXIST
def tearDown(self):
self.temp_dir.clean_up()
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