forked from avian2/pylog2rotate
/
tests.py
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tests.py
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from math import log
import datetime
import unittest
from log2rotate import backups_to_keep, Log2RotateStr, run, Log2RotateUnsafeError
def print_set(r):
l = []
for n in range(1, max(r)+1):
if n in r:
l.append('X')
else:
l.append(' ')
print(''.join(l))
class TestBackupsToKeep(unittest.TestCase):
def test_zero(self):
self.assertEqual(set(), backups_to_keep(0))
def test_one(self):
self.assertEqual(set([1]), backups_to_keep(1))
def test_four(self):
self.assertEqual(set([1, 2, 4]), backups_to_keep(4))
def test_seven(self):
self.assertEqual(set([1, 2, 3, 5, 7]), backups_to_keep(7))
def test_spacing(self):
for n in range(3, 10000):
r = backups_to_keep(n)
# Always keep the oldest backup
self.assertTrue(n in r)
# Always keep the newest backup
self.assertTrue(1 in r)
# Number of backups is always between log2(n) and 2*log2(n)
self.assertGreaterEqual(len(r), log(n, 2))
self.assertLess(len(r), 2*log(n, 2))
def test_spacing_incremental(self):
state = set()
for n in range(1, 10000):
state = set([1] + [i+1 for i in state])
f = backups_to_keep(max(state))
state &= f
# If the algorithm is applied incrementally, the state of
# the backups should be identical to the state recommended by
# the backups_to_keep function.
self.assertEqual(f, state)
#print_set(state)
from log2rotate import Log2Rotate
class TestFuzzyRange(unittest.TestCase):
def test_zero(self):
self.assertEqual([0], Log2Rotate.fuzzy_range(0))
def test_one(self):
self.assertEqual([0, 1, -1], Log2Rotate.fuzzy_range(1))
def test_two(self):
self.assertEqual([0, 1, -1, 2, -2], Log2Rotate.fuzzy_range(2))
def _gen_state(n, fmt):
now = datetime.datetime(2015, 1, 1)
td = datetime.timedelta(days=1)
state = []
for i in range(n):
state.append(now.strftime(fmt))
now += td
return state
class TestLog2RotateStr(unittest.TestCase):
def setUp(self):
self.fmt = "backup-%Y%m%d"
self.l2r = Log2RotateStr(fmt=self.fmt)
def test_zero(self):
self.assertEqual(set(), self.l2r.backups_to_keep([]))
def _gen_state(self, n):
return _gen_state(n, self.fmt)
def test_zero(self):
self.assertEqual([], self.l2r.backups_to_keep([]))
def test_one(self):
state = self._gen_state(1)
self.assertEqual(["backup-20150101"], self.l2r.backups_to_keep(state))
def test_four(self):
state = self._gen_state(4)
self.assertEqual([ "backup-20150101",
"backup-20150103",
"backup-20150104"], self.l2r.backups_to_keep(state))
def test_seven(self):
state = self._gen_state(7)
self.assertEqual([ "backup-20150101",
"backup-20150103",
"backup-20150105",
"backup-20150106",
"backup-20150107"], self.l2r.backups_to_keep(state))
def test_twenty(self):
state = self._gen_state(20)
self.assertEqual([ "backup-20150101",
"backup-20150109",
"backup-20150113",
"backup-20150117",
"backup-20150119",
"backup-20150120"], self.l2r.backups_to_keep(state))
def test_twenty_fuzz(self):
state = self._gen_state(20)
del state[8]
self.assertEqual([ "backup-20150101",
"backup-20150108",
"backup-20150113",
"backup-20150117",
"backup-20150119",
"backup-20150120"], self.l2r.backups_to_keep(state, fuzz=1))
def test_twenty_fuzz(self):
state = [ "backup-20150101",
"backup-20150110",
"backup-20150113",
"backup-20150117",
"backup-20150119",
"backup-20150120"]
self.assertEqual(state, self.l2r.backups_to_keep(state, fuzz=1))
def test_spacing(self):
n = 10000
state = self._gen_state(n)
new_state = self.l2r.backups_to_keep(state)
# Always keep the oldest backup
self.assertTrue(state[0] in new_state)
# Always keep the newest backup
self.assertTrue(state[-1] in new_state)
# Number of backups is always between log2(n) and 2*log2(n)
self.assertGreaterEqual(len(new_state), log(n, 2))
self.assertLess(len(new_state), 2*log(n, 2))
def test_idempotency(self):
state = self._gen_state(10000)
state_1 = self.l2r.backups_to_keep(state)
state_2 = self.l2r.backups_to_keep(state_1)
self.assertEqual(state_1, state_2)
def test_incremental(self):
n = 200
state = self._gen_state(n)
inc_state = []
for n in range(n):
inc_state.append(state[n])
inc_state = self.l2r.backups_to_keep(inc_state)
self.assertEqual(inc_state, self.l2r.backups_to_keep(state[:n+1]))
def test_incremental_fuzz(self):
# this tests, if incrementally rotating backups yields the
# same result as rotating all at once.
#
# all combinations with one backup missing are tested.
n0 = 50
state = self._gen_state(n0)
for m in range(n0):
inc_state = []
state0 = []
for n in range(n0):
if n != m:
inc_state.append(state[n])
state0.append(state[n])
inc_state = self.l2r.backups_to_keep(inc_state, fuzz=1)
self.assertEqual(inc_state, self.l2r.backups_to_keep(state0, fuzz=1))
def test_compare_fuzz_nofuzz(self):
n0 = 50
state = self._gen_state(n0)
for m in range(n0):
state0 = []
state0_nofuzz = []
for n in range(n0):
if n != m:
state0.append(state[n])
state0_nofuzz.append(state[n])
rstate = self.l2r.backups_to_keep(state0, fuzz=1)
rstate_nofuzz = self.l2r.backups_to_keep(state0_nofuzz)
o = len(rstate)
o_nofuzz = len(rstate_nofuzz)
self.assertGreaterEqual(o_nofuzz, o)
self.assertLessEqual(o_nofuzz - o, 1)
def test_oldest_backup_gone(self):
# We have a rotated set of backups. The oldest backup
# disappears. Another rotation should not remove anything.
n = 100
state = self._gen_state(n)
state2 = self.l2r.backups_to_keep(state)
state2 = set(state2)
state2.remove(min(state2))
state3 = set(self.l2r.backups_to_keep(state2))
self.assertEqual(state3, state2)
def test_unsafe(self):
# algorithm says "backup-20150103" should be kept, but
# is missing in input list
state = [ "backup-20150101",
"backup-20150104" ]
self.assertRaises(Log2RotateUnsafeError, self.l2r.backups_to_keep, state)
class TestLog2RotateStrSkip(unittest.TestCase):
def setUp(self):
self.fmt = "backup-%Y%m%d"
self.l2r = Log2RotateStr(fmt=self.fmt, skip=3)
def _gen_state(self, n):
return _gen_state(n, self.fmt)
def test_skip_7(self):
state = self._gen_state(7)
self.assertEqual([ "backup-20150101",
"backup-20150103",
"backup-20150104",
"backup-20150105",
"backup-20150106",
"backup-20150107"], self.l2r.backups_to_keep(state))
def test_skip_3(self):
state = self._gen_state(3)
self.assertEqual(state, self.l2r.backups_to_keep(state))
def test_skip_3_fuzz(self):
state = [ "backup-20150101",
"backup-20150103" ]
fuzz_list = []
self.assertEqual(state, self.l2r.backups_to_keep(state, fuzz_list=fuzz_list, fuzz=1))
self.assertEqual(len(fuzz_list), 1)
def test_skip_unsafe(self):
state = [ "backup-20150101",
"backup-20150103" ]
self.assertRaises(Log2RotateUnsafeError, self.l2r.backups_to_keep, state)
class MockArgs(object):
def __init__(self):
self.fmt = "%Y-%m-%d"
self.skip = 0
def __getattr__(self, name):
return None
class TestMain(unittest.TestCase):
def test_default_keep(self):
args = MockArgs()
args.show_keep = True
inp = _gen_state(4, "%Y-%m-%d")
out = run(args, inp)
self.assertEqual(set([ "2015-01-01",
"2015-01-03",
"2015-01-04"]), set(out))
def test_default_delete(self):
args = MockArgs()
args.show_delete = True
inp = _gen_state(4, "%Y-%m-%d")
out = run(args, inp)
self.assertEqual(set([ "2015-01-02"]), set(out))
def test_skip_keep(self):
args = MockArgs()
args.show_keep = True
args.skip = 3
inp = _gen_state(7, "%Y-%m-%d")
out = run(args, inp)
self.assertEqual(set([ "2015-01-01",
"2015-01-03",
"2015-01-04",
"2015-01-05",
"2015-01-06",
"2015-01-07"]), set(out))
def test_skip_delete(self):
args = MockArgs()
args.show_delete = True
args.skip = 3
inp = _gen_state(7, "%Y-%m-%d")
out = run(args, inp)
self.assertEqual(set([ "2015-01-02"]), set(out))
def test_always_keep_invalid(self):
args = MockArgs()
args.show_keep = True
inp = _gen_state(4, "%Y-%m-%d")
inp.append("strange")
out = run(args, inp)
self.assertEqual(set([ "strange",
"2015-01-01",
"2015-01-03",
"2015-01-04"]), set(out))
def test_never_delete_invalid(self):
args = MockArgs()
args.show_delete = True
inp = _gen_state(4, "%Y-%m-%d")
inp.append("strange")
out = run(args, inp)
self.assertEqual(set([ "2015-01-02"]), set(out))
def test_unsafe(self):
args = MockArgs()
args.show_keep = True
inp = [ "2015-01-01",
"2015-01-04" ]
self.assertRaises(Log2RotateUnsafeError, run, args, inp)
def test_unsafe_force(self):
args = MockArgs()
args.show_keep = True
args.unsafe = True
inp = [ "2015-01-01",
"2015-01-04" ]
out = run(args, inp)
self.assertEqual(set([ "2015-01-01",
"2015-01-04"]), set(out))
def test_duplicates_ignored_keep(self):
args = MockArgs()
args.show_keep = True
inp = _gen_state(4, "%Y-%m-%d")
self.assertEqual( run(args, inp),
run(args, inp*2) )
def test_duplicates_ignored_delete(self):
args = MockArgs()
args.show_delete = True
inp = _gen_state(4, "%Y-%m-%d")
self.assertEqual( run(args, inp),
run(args, inp*2) )
if __name__ == '__main__':
unittest.main()