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216 lines
6.4 KiB
Python
216 lines
6.4 KiB
Python
import unittest
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import dbm
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import shelve
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import pickle
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import os
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from test.support import os_helper
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from collections.abc import MutableMapping
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from test.test_dbm import dbm_iterator
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def L1(s):
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return s.decode("latin-1")
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class byteskeydict(MutableMapping):
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"Mapping that supports bytes keys"
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def __init__(self):
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self.d = {}
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def __getitem__(self, key):
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return self.d[L1(key)]
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def __setitem__(self, key, value):
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self.d[L1(key)] = value
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def __delitem__(self, key):
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del self.d[L1(key)]
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def __len__(self):
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return len(self.d)
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def iterkeys(self):
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for k in self.d.keys():
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yield k.encode("latin-1")
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__iter__ = iterkeys
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def keys(self):
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return list(self.iterkeys())
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def copy(self):
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return byteskeydict(self.d)
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class TestCase(unittest.TestCase):
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dirname = os_helper.TESTFN
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fn = os.path.join(os_helper.TESTFN, "shelftemp.db")
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def test_close(self):
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d1 = {}
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s = shelve.Shelf(d1, protocol=2, writeback=False)
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s['key1'] = [1,2,3,4]
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self.assertEqual(s['key1'], [1,2,3,4])
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self.assertEqual(len(s), 1)
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s.close()
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self.assertRaises(ValueError, len, s)
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try:
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s['key1']
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except ValueError:
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pass
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else:
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self.fail('Closed shelf should not find a key')
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def test_open_template(self, filename=None, protocol=None):
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os.mkdir(self.dirname)
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self.addCleanup(os_helper.rmtree, self.dirname)
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s = shelve.open(filename=filename if filename is not None else self.fn,
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protocol=protocol)
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try:
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s['key1'] = (1,2,3,4)
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self.assertEqual(s['key1'], (1,2,3,4))
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finally:
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s.close()
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def test_ascii_file_shelf(self):
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self.test_open_template(protocol=0)
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def test_binary_file_shelf(self):
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self.test_open_template(protocol=1)
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def test_proto2_file_shelf(self):
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self.test_open_template(protocol=2)
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def test_pathlib_path_file_shelf(self):
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self.test_open_template(filename=os_helper.FakePath(self.fn))
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def test_bytes_path_file_shelf(self):
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self.test_open_template(filename=os.fsencode(self.fn))
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def test_pathlib_bytes_path_file_shelf(self):
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self.test_open_template(filename=os_helper.FakePath(os.fsencode(self.fn)))
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def test_in_memory_shelf(self):
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d1 = byteskeydict()
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with shelve.Shelf(d1, protocol=0) as s:
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s['key1'] = (1,2,3,4)
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self.assertEqual(s['key1'], (1,2,3,4))
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d2 = byteskeydict()
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with shelve.Shelf(d2, protocol=1) as s:
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s['key1'] = (1,2,3,4)
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self.assertEqual(s['key1'], (1,2,3,4))
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self.assertEqual(len(d1), 1)
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self.assertEqual(len(d2), 1)
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self.assertNotEqual(d1.items(), d2.items())
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def test_mutable_entry(self):
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d1 = byteskeydict()
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with shelve.Shelf(d1, protocol=2, writeback=False) as s:
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s['key1'] = [1,2,3,4]
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self.assertEqual(s['key1'], [1,2,3,4])
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s['key1'].append(5)
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self.assertEqual(s['key1'], [1,2,3,4])
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d2 = byteskeydict()
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with shelve.Shelf(d2, protocol=2, writeback=True) as s:
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s['key1'] = [1,2,3,4]
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self.assertEqual(s['key1'], [1,2,3,4])
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s['key1'].append(5)
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self.assertEqual(s['key1'], [1,2,3,4,5])
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self.assertEqual(len(d1), 1)
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self.assertEqual(len(d2), 1)
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def test_keyencoding(self):
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d = {}
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key = 'Pöp'
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# the default keyencoding is utf-8
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shelve.Shelf(d)[key] = [1]
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self.assertIn(key.encode('utf-8'), d)
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# but a different one can be given
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shelve.Shelf(d, keyencoding='latin-1')[key] = [1]
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self.assertIn(key.encode('latin-1'), d)
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# with all consequences
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s = shelve.Shelf(d, keyencoding='ascii')
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self.assertRaises(UnicodeEncodeError, s.__setitem__, key, [1])
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def test_writeback_also_writes_immediately(self):
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# Issue 5754
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d = {}
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key = 'key'
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encodedkey = key.encode('utf-8')
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with shelve.Shelf(d, writeback=True) as s:
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s[key] = [1]
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p1 = d[encodedkey] # Will give a KeyError if backing store not updated
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s['key'].append(2)
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p2 = d[encodedkey]
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self.assertNotEqual(p1, p2) # Write creates new object in store
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def test_with(self):
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d1 = {}
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with shelve.Shelf(d1, protocol=2, writeback=False) as s:
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s['key1'] = [1,2,3,4]
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self.assertEqual(s['key1'], [1,2,3,4])
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self.assertEqual(len(s), 1)
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self.assertRaises(ValueError, len, s)
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try:
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s['key1']
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except ValueError:
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pass
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else:
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self.fail('Closed shelf should not find a key')
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def test_default_protocol(self):
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with shelve.Shelf({}) as s:
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self.assertEqual(s._protocol, pickle.DEFAULT_PROTOCOL)
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class TestShelveBase:
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type2test = shelve.Shelf
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def _reference(self):
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return {"key1":"value1", "key2":2, "key3":(1,2,3)}
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class TestShelveInMemBase(TestShelveBase):
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def _empty_mapping(self):
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return shelve.Shelf(byteskeydict(), **self._args)
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class TestShelveFileBase(TestShelveBase):
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counter = 0
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def _empty_mapping(self):
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self.counter += 1
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x = shelve.open(self.base_path + str(self.counter), **self._args)
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self.addCleanup(x.close)
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return x
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def setUp(self):
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dirname = os_helper.TESTFN
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os.mkdir(dirname)
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self.addCleanup(os_helper.rmtree, dirname)
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self.base_path = os.path.join(dirname, "shelftemp.db")
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self.addCleanup(setattr, dbm, '_defaultmod', dbm._defaultmod)
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dbm._defaultmod = self.dbm_mod
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from test import mapping_tests
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for proto in range(pickle.HIGHEST_PROTOCOL + 1):
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bases = (TestShelveInMemBase, mapping_tests.BasicTestMappingProtocol)
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name = f'TestProto{proto}MemShelve'
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globals()[name] = type(name, bases,
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{'_args': {'protocol': proto}})
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bases = (TestShelveFileBase, mapping_tests.BasicTestMappingProtocol)
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for dbm_mod in dbm_iterator():
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assert dbm_mod.__name__.startswith('dbm.')
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suffix = dbm_mod.__name__[4:]
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name = f'TestProto{proto}File_{suffix}Shelve'
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globals()[name] = type(name, bases,
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{'dbm_mod': dbm_mod, '_args': {'protocol': proto}})
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if __name__ == "__main__":
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unittest.main()
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