def test_file_open(self):
with self.assertRaises(PermissionError):
with open(self._path, 'wt', encoding='utf-8') as f:
f.write('original')
with FileReplace(self._path, mode='wt') as f:
f.write('hello')
self.confirm('original')
def test_exception_during_replace(self):
with open(self._path, 'wt', encoding='utf-8') as f:
f.write('original')
with self.assertRaises(RuntimeError):
with FileReplace(self._path, mode='wt') as f:
f.write('hello')
raise RuntimeError('doh')
self.confirm('original')
def test_file_open(self):
if sys.platform.startswith('win'):
# windows has file locking by default
with self.assertRaises(PermissionError):
with open(self._path, 'wt', encoding='utf-8') as f1:
f1.write('original')
with FileReplace(self._path, mode='wt') as f2:
f2.write('hello')
self.confirm('original')
def test_file_delete_during_replace(self):
with FileReplace(self._path, mode='wt') as f:
f.write('hello')
os.remove(self._path)
self.confirm('hello')
def test_file_exists(self):
with FileReplace(self._path, mode='wt') as f:
f.write('hello')
self.confirm('hello')
def test_does_not_exist(self):
os.remove(self._path)
with FileReplace(self._path, mode='wt') as f:
f.write('hello')
self.confirm('hello')