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 test_short_filename(self):
path = self.temp_dir / 'a'
atomic_write(path, b'contents')
assert 'contents' == read_file(path)