/usr/lib/python3/dist-packages/postgresql/test/test_python.py is in python3-postgresql 1.1.0-2build2.
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# .test.test_python
##
import unittest
import socket
import errno
import struct
from itertools import chain
from operator import methodcaller
from contextlib import contextmanager
from ..python.itertools import interlace
from ..python.structlib import split_sized_data
from ..python import functools
from ..python import itertools
from ..python.socket import find_available_port
from ..python import element
class Ele(element.Element):
_e_label = property(
lambda x: getattr(x, 'label', 'ELEMENT')
)
_e_factors = ('ancestor', 'secondary')
secondary = None
def __init__(self, s = None):
self.ancestor = s
def __str__(self):
return 'STRDATA'
def _e_metas(self):
yield ('first', getattr(self, 'first', 'firstv'))
yield ('second', getattr(self, 'second', 'secondv'))
class test_element(unittest.TestCase):
def test_primary_factor(self):
x = Ele()
# no factors
self.assertEqual(element.prime_factor(object()), None)
self.assertEqual(element.prime_factor(x), ('ancestor', None))
y = Ele(x)
self.assertEqual(element.prime_factor(y), ('ancestor', x))
def test_primary_factors(self):
x = Ele()
x.ancestor = x
self.assertRaises(
element.RecursiveFactor, list, element.prime_factors(x)
)
y = Ele(x)
x.ancestor = y
self.assertRaises(
element.RecursiveFactor, list, element.prime_factors(y)
)
self.assertRaises(
element.RecursiveFactor, list, element.prime_factors(x)
)
x.ancestor = None
z = Ele(y)
self.assertEqual(list(element.prime_factors(z)), [
('ancestor', y),
('ancestor', x),
('ancestor', None),
])
def test_format_element(self):
# Considering that this is subject to change, frequently,
# I/O equality tests are inappropriate.
# Rather, a hierarchy will be defined, and the existence
# of certain pieces of information in the string will be validated.
x = Ele()
y = Ele()
z = Ele()
alt1 = Ele()
alt2 = Ele()
alt1.first = 'alt1-first'
alt1.second = 'alt1-second'
alt2.first = 'alt2-first'
alt2.second = 'alt2-second'
altprime = Ele()
altprime.first = 'alt2-ancestor'
alt2.ancestor = altprime
z.ancestor = y
y.ancestor = x
z.secondary = alt1
y.secondary = alt2
x.first = 'unique1'
y.first = 'unique2'
x.second = 'unique3'
z.second = 'unique4'
y.label = 'DIFF'
data = element.format_element(z)
self.assertTrue(x.first in data)
self.assertTrue(y.first in data)
self.assertTrue(x.second in data)
self.assertTrue(z.second in data)
self.assertTrue('DIFF' in data)
self.assertTrue('alt1-first' in data)
self.assertTrue('alt2-first' in data)
self.assertTrue('alt1-second' in data)
self.assertTrue('alt2-second' in data)
self.assertTrue('alt2-ancestor' in data)
x.ancestor = z
self.assertRaises(element.RecursiveFactor, element.format_element, z)
class test_itertools(unittest.TestCase):
def testInterlace(self):
i1 = range(0, 100, 4)
i2 = range(1, 100, 4)
i3 = range(2, 100, 4)
i4 = range(3, 100, 4)
self.assertEqual(
list(itertools.interlace(i1, i2, i3, i4)),
list(range(100))
)
class test_functools(unittest.TestCase):
def testComposition(self):
compose = functools.Composition
simple = compose((int, str))
self.assertEqual("100", simple("100"))
timesfour_fourtimes = compose((methodcaller('__mul__', 4),)*4)
self.assertEqual(4*(4*4*4*4), timesfour_fourtimes(4))
nothing = compose(())
self.assertEqual(nothing("100"), "100")
self.assertEqual(nothing(100), 100)
self.assertEqual(nothing(None), None)
def testRSetAttr(self):
class anob(object):
pass
ob = anob()
self.assertRaises(AttributeError, getattr, ob, 'foo')
rob = functools.rsetattr('foo', 'bar', ob)
self.assertTrue(rob is ob)
self.assertTrue(rob.foo is ob.foo)
self.assertTrue(rob.foo == 'bar')
class test_socket(unittest.TestCase):
def testFindAvailable(self):
# the port is randomly generated, so make a few trials before
# determining success.
for i in range(100):
portnum = find_available_port()
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
s.connect(('localhost', portnum))
except socket.error as err:
self.assertEqual(err.errno, errno.ECONNREFUSED)
else:
self.fail("got a connection to an available port: " + str(portnum))
finally:
s.close()
def join_sized_data(*data,
packL = struct.Struct("!L").pack,
getlen = lambda x: len(x) if x is not None else 0xFFFFFFFF
):
return b''.join(interlace(map(packL, map(getlen, data)), (x if x is not None else b'' for x in data)))
class test_structlib(unittest.TestCase):
def testSizedSplit(self):
sample = [
(b'foo', b'bar'),
(b'foo', None, b'bar'),
(b'foo', None, b'bar'),
(b'foo', b'bar'),
(),
(None,None,None),
(b'x', None,None,None, b'yz'),
]
packed_sample = [join_sized_data(*x) for x in sample]
self.assertRaises(ValueError, split_sized_data(b'\xFF\xFF\xFF\x01foo').__next__)
self.assertEqual(sample, [tuple(split_sized_data(x)) for x in packed_sample])
if __name__ == '__main__':
from types import ModuleType
this = ModuleType("this")
this.__dict__.update(globals())
unittest.main(this)
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