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import unittest
import shelve
import glob
from test import support
from collections.abc import MutableMapping
from test.test_dbm import dbm_iterator
def L1(s):
return s.decode("latin-1")
class byteskeydict(MutableMapping):
"Mapping that supports bytes keys"
def __init__(self):
self.d = {}
def __getitem__(self, key):
return self.d[L1(key)]
def __setitem__(self, key, value):
self.d[L1(key)] = value
def __delitem__(self, key):
del self.d[L1(key)]
def __len__(self):
return len(self.d)
def iterkeys(self):
for k in self.d.keys():
yield k.encode("latin-1")
__iter__ = iterkeys
def keys(self):
return list(self.iterkeys())
def copy(self):
return byteskeydict(self.d)
class TestCase(unittest.TestCase):
fn = "shelftemp.db"
def tearDown(self):
for f in glob.glob(self.fn+"*"):
support.unlink(f)
def test_close(self):
d1 = {}
s = shelve.Shelf(d1, protocol=2, writeback=False)
s['key1'] = [1,2,3,4]
self.assertEqual(s['key1'], [1,2,3,4])
self.assertEqual(len(s), 1)
s.close()
self.assertRaises(ValueError, len, s)
try:
s['key1']
except ValueError:
pass
else:
self.fail('Closed shelf should not find a key')
def test_ascii_file_shelf(self):
s = shelve.open(self.fn, protocol=0)
try:
s['key1'] = (1,2,3,4)
self.assertEqual(s['key1'], (1,2,3,4))
finally:
s.close()
def test_binary_file_shelf(self):
s = shelve.open(self.fn, protocol=1)
try:
s['key1'] = (1,2,3,4)
self.assertEqual(s['key1'], (1,2,3,4))
finally:
s.close()
def test_proto2_file_shelf(self):
s = shelve.open(self.fn, protocol=2)
try:
s['key1'] = (1,2,3,4)
self.assertEqual(s['key1'], (1,2,3,4))
finally:
s.close()
def test_in_memory_shelf(self):
d1 = byteskeydict()
with shelve.Shelf(d1, protocol=0) as s:
s['key1'] = (1,2,3,4)
self.assertEqual(s['key1'], (1,2,3,4))
d2 = byteskeydict()
with shelve.Shelf(d2, protocol=1) as s:
s['key1'] = (1,2,3,4)
self.assertEqual(s['key1'], (1,2,3,4))
self.assertEqual(len(d1), 1)
self.assertEqual(len(d2), 1)
self.assertNotEqual(d1.items(), d2.items())
def test_mutable_entry(self):
d1 = byteskeydict()
with shelve.Shelf(d1, protocol=2, writeback=False) as s:
s['key1'] = [1,2,3,4]
self.assertEqual(s['key1'], [1,2,3,4])
s['key1'].append(5)
self.assertEqual(s['key1'], [1,2,3,4])
d2 = byteskeydict()
with shelve.Shelf(d2, protocol=2, writeback=True) as s:
s['key1'] = [1,2,3,4]
self.assertEqual(s['key1'], [1,2,3,4])
s['key1'].append(5)
self.assertEqual(s['key1'], [1,2,3,4,5])
self.assertEqual(len(d1), 1)
self.assertEqual(len(d2), 1)
def test_keyencoding(self):
d = {}
key = 'Pöp'
# the default keyencoding is utf-8
shelve.Shelf(d)[key] = [1]
self.assertIn(key.encode('utf-8'), d)
# but a different one can be given
shelve.Shelf(d, keyencoding='latin-1')[key] = [1]
self.assertIn(key.encode('latin-1'), d)
# with all consequences
s = shelve.Shelf(d, keyencoding='ascii')
self.assertRaises(UnicodeEncodeError, s.__setitem__, key, [1])
def test_writeback_also_writes_immediately(self):
# Issue 5754
d = {}
key = 'key'
encodedkey = key.encode('utf-8')
with shelve.Shelf(d, writeback=True) as s:
s[key] = [1]
p1 = d[encodedkey] # Will give a KeyError if backing store not updated
s['key'].append(2)
p2 = d[encodedkey]
self.assertNotEqual(p1, p2) # Write creates new object in store
def test_with(self):
d1 = {}
with shelve.Shelf(d1, protocol=2, writeback=False) as s:
s['key1'] = [1,2,3,4]
self.assertEqual(s['key1'], [1,2,3,4])
self.assertEqual(len(s), 1)
self.assertRaises(ValueError, len, s)
try:
s['key1']
except ValueError:
pass
else:
self.fail('Closed shelf should not find a key')
def test_default_protocol(self):
with shelve.Shelf({}) as s:
self.assertEqual(s._protocol, 3)
from test import mapping_tests
class TestShelveBase(mapping_tests.BasicTestMappingProtocol):
fn = "shelftemp.db"
counter = 0
def __init__(self, *args, **kw):
self._db = []
mapping_tests.BasicTestMappingProtocol.__init__(self, *args, **kw)
type2test = shelve.Shelf
def _reference(self):
return {"key1":"value1", "key2":2, "key3":(1,2,3)}
def _empty_mapping(self):
if self._in_mem:
x= shelve.Shelf(byteskeydict(), **self._args)
else:
self.counter+=1
x= shelve.open(self.fn+str(self.counter), **self._args)
self._db.append(x)
return x
def tearDown(self):
for db in self._db:
db.close()
self._db = []
if not self._in_mem:
for f in glob.glob(self.fn+"*"):
support.unlink(f)
class TestAsciiFileShelve(TestShelveBase):
_args={'protocol':0}
_in_mem = False
class TestBinaryFileShelve(TestShelveBase):
_args={'protocol':1}
_in_mem = False
class TestProto2FileShelve(TestShelveBase):
_args={'protocol':2}
_in_mem = False
class TestAsciiMemShelve(TestShelveBase):
_args={'protocol':0}
_in_mem = True
class TestBinaryMemShelve(TestShelveBase):
_args={'protocol':1}
_in_mem = True
class TestProto2MemShelve(TestShelveBase):
_args={'protocol':2}
_in_mem = True
def test_main():
for module in dbm_iterator():
support.run_unittest(
TestAsciiFileShelve,
TestBinaryFileShelve,
TestProto2FileShelve,
TestAsciiMemShelve,
TestBinaryMemShelve,
TestProto2MemShelve,
TestCase
)
if __name__ == "__main__":
test_main()
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