def test_incremental_write_does_not_set_future_time(self):
content = factory.make_bytes()
filename = self.make_file(contents=factory.make_string())
# Pretend that this file is older than it is. So that
# incrementing its mtime won't put it in the future.
old_mtime = os.stat(filename).st_mtime + 10
os.utime(filename, (old_mtime, old_mtime))
incremental_write(content, filename)
new_time = time.time()
self.assertAlmostEqual(os.stat(filename).st_mtime, new_time, delta=2.0)
def test_incremental_write_updates_modification_time(self):
content = factory.make_bytes()
filename = self.make_file(contents=factory.make_string())
# Pretend that this file is older than it is. So that
# incrementing its mtime won't put it in the future.
old_mtime = os.stat(filename).st_mtime - 10
os.utime(filename, (old_mtime, old_mtime))
incremental_write(content, filename)
new_time = time.time()
# should be much closer to new_time than to old_mtime.
self.assertAlmostEqual(os.stat(filename).st_mtime, new_time, delta=2.0)
def write_zone_file(cls, output_file, *parameters):
"""Write a zone file based on the zone file template.
There is a subtlety with zone files: their filesystem timestamp must
increase with every rewrite. Some filesystems (ext3?) only seem to
support a resolution of one second, and so this method may set an
unexpected modification time in order to maintain that property.
"""
if not isinstance(output_file, list):
output_file = [output_file]
for outfile in output_file:
content = render_dns_template(cls.template_file_name, *parameters)
with report_missing_config_dir():
incremental_write(content.encode("utf-8"), outfile, mode=0o644)
pass
def test_incremental_write_sets_permissions(self):
atomic_file = self.make_file()
mode = 0o323
incremental_write(factory.make_bytes(), atomic_file, mode=mode)
self.assertEqual(mode, stat.S_IMODE(os.stat(atomic_file).st_mode))
