hook: have a generic hook for transaction opening
We are adding generic hooking for all transactions. We do not really have any
useful information to include when opening the transaction but this is a
useful time to allow a hook anyway. We better let people abort transaction before
they happen than after multiple seconds/minutes of processing.
import os
import glob
import unittest
import silenttestrunner
from mercurial.util import atomictempfile
class testatomictempfile(unittest.TestCase):
def test1_simple(self):
if os.path.exists('foo'):
os.remove('foo')
file = atomictempfile('foo')
(dir, basename) = os.path.split(file._tempname)
self.assertFalse(os.path.isfile('foo'))
self.assertTrue(basename in glob.glob('.foo-*'))
file.write('argh\n')
file.close()
self.assertTrue(os.path.isfile('foo'))
self.assertTrue(basename not in glob.glob('.foo-*'))
# discard() removes the temp file without making the write permanent
def test2_discard(self):
if os.path.exists('foo'):
os.remove('foo')
file = atomictempfile('foo')
(dir, basename) = os.path.split(file._tempname)
file.write('yo\n')
file.discard()
self.assertFalse(os.path.isfile('foo'))
self.assertTrue(basename not in os.listdir('.'))
# if a programmer screws up and passes bad args to atomictempfile, they
# get a plain ordinary TypeError, not infinite recursion
def test3_oops(self):
self.assertRaises(TypeError, atomictempfile)
if __name__ == '__main__':
silenttestrunner.main(__name__)