647 lines
23 KiB
Python
Executable File
647 lines
23 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# extras_dictcursor - test if DictCursor extension class works
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#
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# Copyright (C) 2004-2019 Federico Di Gregorio <fog@debian.org>
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# Copyright (C) 2020-2021 The Psycopg Team
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#
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# psycopg2 is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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# License for more details.
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import copy
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import time
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import pickle
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import unittest
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from datetime import timedelta
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from functools import lru_cache
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import psycopg2
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import psycopg2.extras
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from psycopg2.extras import NamedTupleConnection, NamedTupleCursor
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from .testutils import ConnectingTestCase, skip_before_postgres, \
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crdb_version, skip_if_crdb
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class _DictCursorBase(ConnectingTestCase):
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def setUp(self):
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ConnectingTestCase.setUp(self)
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curs = self.conn.cursor()
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if crdb_version(self.conn) is not None:
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curs.execute("SET experimental_enable_temp_tables = 'on'")
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curs.execute("CREATE TEMPORARY TABLE ExtrasDictCursorTests (foo text)")
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curs.execute("INSERT INTO ExtrasDictCursorTests VALUES ('bar')")
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self.conn.commit()
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def _testIterRowNumber(self, curs):
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# Only checking for dataset < itersize:
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# see CursorTests.test_iter_named_cursor_rownumber
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curs.itersize = 20
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curs.execute("""select * from generate_series(1,10)""")
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for i, r in enumerate(curs):
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self.assertEqual(i + 1, curs.rownumber)
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def _testNamedCursorNotGreedy(self, curs):
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curs.itersize = 2
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curs.execute("""select clock_timestamp() as ts from generate_series(1,3)""")
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recs = []
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for t in curs:
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time.sleep(0.01)
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recs.append(t)
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# check that the dataset was not fetched in a single gulp
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self.assert_(recs[1]['ts'] - recs[0]['ts'] < timedelta(seconds=0.005))
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self.assert_(recs[2]['ts'] - recs[1]['ts'] > timedelta(seconds=0.0099))
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class ExtrasDictCursorTests(_DictCursorBase):
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"""Test if DictCursor extension class works."""
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@skip_if_crdb("named cursor")
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def testDictConnCursorArgs(self):
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self.conn.close()
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self.conn = self.connect(connection_factory=psycopg2.extras.DictConnection)
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cur = self.conn.cursor()
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self.assert_(isinstance(cur, psycopg2.extras.DictCursor))
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self.assertEqual(cur.name, None)
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# overridable
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cur = self.conn.cursor('foo',
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cursor_factory=psycopg2.extras.NamedTupleCursor)
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self.assertEqual(cur.name, 'foo')
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self.assert_(isinstance(cur, psycopg2.extras.NamedTupleCursor))
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def testDictCursorWithPlainCursorFetchOne(self):
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self._testWithPlainCursor(lambda curs: curs.fetchone())
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def testDictCursorWithPlainCursorFetchMany(self):
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self._testWithPlainCursor(lambda curs: curs.fetchmany(100)[0])
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def testDictCursorWithPlainCursorFetchManyNoarg(self):
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self._testWithPlainCursor(lambda curs: curs.fetchmany()[0])
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def testDictCursorWithPlainCursorFetchAll(self):
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self._testWithPlainCursor(lambda curs: curs.fetchall()[0])
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def testDictCursorWithPlainCursorIter(self):
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def getter(curs):
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for row in curs:
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return row
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self._testWithPlainCursor(getter)
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def testUpdateRow(self):
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row = self._testWithPlainCursor(lambda curs: curs.fetchone())
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row['foo'] = 'qux'
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self.failUnless(row['foo'] == 'qux')
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self.failUnless(row[0] == 'qux')
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@skip_before_postgres(8, 0)
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def testDictCursorWithPlainCursorIterRowNumber(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
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self._testIterRowNumber(curs)
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def _testWithPlainCursor(self, getter):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
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curs.execute("SELECT * FROM ExtrasDictCursorTests")
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row = getter(curs)
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self.failUnless(row['foo'] == 'bar')
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self.failUnless(row[0] == 'bar')
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return row
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def testDictCursorWithNamedCursorFetchOne(self):
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self._testWithNamedCursor(lambda curs: curs.fetchone())
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def testDictCursorWithNamedCursorFetchMany(self):
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self._testWithNamedCursor(lambda curs: curs.fetchmany(100)[0])
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def testDictCursorWithNamedCursorFetchManyNoarg(self):
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self._testWithNamedCursor(lambda curs: curs.fetchmany()[0])
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def testDictCursorWithNamedCursorFetchAll(self):
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self._testWithNamedCursor(lambda curs: curs.fetchall()[0])
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def testDictCursorWithNamedCursorIter(self):
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def getter(curs):
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for row in curs:
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return row
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self._testWithNamedCursor(getter)
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@skip_if_crdb("named cursor")
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@skip_before_postgres(8, 2)
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def testDictCursorWithNamedCursorNotGreedy(self):
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curs = self.conn.cursor('tmp', cursor_factory=psycopg2.extras.DictCursor)
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self._testNamedCursorNotGreedy(curs)
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@skip_if_crdb("named cursor")
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@skip_before_postgres(8, 0)
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def testDictCursorWithNamedCursorIterRowNumber(self):
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curs = self.conn.cursor('tmp', cursor_factory=psycopg2.extras.DictCursor)
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self._testIterRowNumber(curs)
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@skip_if_crdb("named cursor")
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def _testWithNamedCursor(self, getter):
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curs = self.conn.cursor('aname', cursor_factory=psycopg2.extras.DictCursor)
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curs.execute("SELECT * FROM ExtrasDictCursorTests")
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row = getter(curs)
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self.failUnless(row['foo'] == 'bar')
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self.failUnless(row[0] == 'bar')
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def testPickleDictRow(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
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curs.execute("select 10 as a, 20 as b")
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r = curs.fetchone()
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d = pickle.dumps(r)
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r1 = pickle.loads(d)
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self.assertEqual(r, r1)
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self.assertEqual(r[0], r1[0])
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self.assertEqual(r[1], r1[1])
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self.assertEqual(r['a'], r1['a'])
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self.assertEqual(r['b'], r1['b'])
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self.assertEqual(r._index, r1._index)
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def test_copy(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
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curs.execute("select 10 as foo, 'hi' as bar")
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rv = curs.fetchone()
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self.assertEqual(len(rv), 2)
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rv2 = copy.copy(rv)
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self.assertEqual(len(rv2), 2)
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self.assertEqual(len(rv), 2)
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rv3 = copy.deepcopy(rv)
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self.assertEqual(len(rv3), 2)
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self.assertEqual(len(rv), 2)
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def test_iter_methods(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
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curs.execute("select 10 as a, 20 as b")
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r = curs.fetchone()
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self.assert_(not isinstance(r.keys(), list))
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self.assertEqual(len(list(r.keys())), 2)
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self.assert_(not isinstance(r.values(), list))
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self.assertEqual(len(list(r.values())), 2)
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self.assert_(not isinstance(r.items(), list))
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self.assertEqual(len(list(r.items())), 2)
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def test_order(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
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curs.execute("select 5 as foo, 4 as bar, 33 as baz, 2 as qux")
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r = curs.fetchone()
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self.assertEqual(list(r), [5, 4, 33, 2])
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self.assertEqual(list(r.keys()), ['foo', 'bar', 'baz', 'qux'])
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self.assertEqual(list(r.values()), [5, 4, 33, 2])
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self.assertEqual(list(r.items()),
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[('foo', 5), ('bar', 4), ('baz', 33), ('qux', 2)])
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r1 = pickle.loads(pickle.dumps(r))
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self.assertEqual(list(r1), list(r))
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self.assertEqual(list(r1.keys()), list(r.keys()))
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self.assertEqual(list(r1.values()), list(r.values()))
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self.assertEqual(list(r1.items()), list(r.items()))
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class ExtrasDictCursorRealTests(_DictCursorBase):
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def testRealMeansReal(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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curs.execute("SELECT * FROM ExtrasDictCursorTests")
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row = curs.fetchone()
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self.assert_(isinstance(row, dict))
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def testDictCursorWithPlainCursorRealFetchOne(self):
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self._testWithPlainCursorReal(lambda curs: curs.fetchone())
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def testDictCursorWithPlainCursorRealFetchMany(self):
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self._testWithPlainCursorReal(lambda curs: curs.fetchmany(100)[0])
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def testDictCursorWithPlainCursorRealFetchManyNoarg(self):
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self._testWithPlainCursorReal(lambda curs: curs.fetchmany()[0])
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def testDictCursorWithPlainCursorRealFetchAll(self):
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self._testWithPlainCursorReal(lambda curs: curs.fetchall()[0])
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def testDictCursorWithPlainCursorRealIter(self):
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def getter(curs):
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for row in curs:
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return row
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self._testWithPlainCursorReal(getter)
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@skip_before_postgres(8, 0)
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def testDictCursorWithPlainCursorRealIterRowNumber(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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self._testIterRowNumber(curs)
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def _testWithPlainCursorReal(self, getter):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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curs.execute("SELECT * FROM ExtrasDictCursorTests")
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row = getter(curs)
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self.failUnless(row['foo'] == 'bar')
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def testPickleRealDictRow(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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curs.execute("select 10 as a, 20 as b")
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r = curs.fetchone()
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d = pickle.dumps(r)
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r1 = pickle.loads(d)
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self.assertEqual(r, r1)
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self.assertEqual(r['a'], r1['a'])
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self.assertEqual(r['b'], r1['b'])
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def test_copy(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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curs.execute("select 10 as foo, 'hi' as bar")
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rv = curs.fetchone()
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self.assertEqual(len(rv), 2)
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rv2 = copy.copy(rv)
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self.assertEqual(len(rv2), 2)
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self.assertEqual(len(rv), 2)
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rv3 = copy.deepcopy(rv)
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self.assertEqual(len(rv3), 2)
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self.assertEqual(len(rv), 2)
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def testDictCursorRealWithNamedCursorFetchOne(self):
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self._testWithNamedCursorReal(lambda curs: curs.fetchone())
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def testDictCursorRealWithNamedCursorFetchMany(self):
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self._testWithNamedCursorReal(lambda curs: curs.fetchmany(100)[0])
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def testDictCursorRealWithNamedCursorFetchManyNoarg(self):
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self._testWithNamedCursorReal(lambda curs: curs.fetchmany()[0])
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def testDictCursorRealWithNamedCursorFetchAll(self):
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self._testWithNamedCursorReal(lambda curs: curs.fetchall()[0])
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def testDictCursorRealWithNamedCursorIter(self):
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def getter(curs):
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for row in curs:
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return row
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self._testWithNamedCursorReal(getter)
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@skip_if_crdb("named cursor")
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@skip_before_postgres(8, 2)
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def testDictCursorRealWithNamedCursorNotGreedy(self):
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curs = self.conn.cursor('tmp', cursor_factory=psycopg2.extras.RealDictCursor)
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self._testNamedCursorNotGreedy(curs)
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@skip_if_crdb("named cursor")
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@skip_before_postgres(8, 0)
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def testDictCursorRealWithNamedCursorIterRowNumber(self):
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curs = self.conn.cursor('tmp', cursor_factory=psycopg2.extras.RealDictCursor)
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self._testIterRowNumber(curs)
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@skip_if_crdb("named cursor")
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def _testWithNamedCursorReal(self, getter):
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curs = self.conn.cursor('aname',
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cursor_factory=psycopg2.extras.RealDictCursor)
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curs.execute("SELECT * FROM ExtrasDictCursorTests")
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row = getter(curs)
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self.failUnless(row['foo'] == 'bar')
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def test_iter_methods(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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curs.execute("select 10 as a, 20 as b")
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r = curs.fetchone()
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self.assert_(not isinstance(r.keys(), list))
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self.assertEqual(len(list(r.keys())), 2)
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self.assert_(not isinstance(r.values(), list))
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self.assertEqual(len(list(r.values())), 2)
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self.assert_(not isinstance(r.items(), list))
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self.assertEqual(len(list(r.items())), 2)
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def test_order(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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curs.execute("select 5 as foo, 4 as bar, 33 as baz, 2 as qux")
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r = curs.fetchone()
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self.assertEqual(list(r), ['foo', 'bar', 'baz', 'qux'])
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self.assertEqual(list(r.keys()), ['foo', 'bar', 'baz', 'qux'])
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self.assertEqual(list(r.values()), [5, 4, 33, 2])
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self.assertEqual(list(r.items()),
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[('foo', 5), ('bar', 4), ('baz', 33), ('qux', 2)])
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r1 = pickle.loads(pickle.dumps(r))
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self.assertEqual(list(r1), list(r))
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self.assertEqual(list(r1.keys()), list(r.keys()))
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self.assertEqual(list(r1.values()), list(r.values()))
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self.assertEqual(list(r1.items()), list(r.items()))
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def test_pop(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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curs.execute("select 1 as a, 2 as b, 3 as c")
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r = curs.fetchone()
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self.assertEqual(r.pop('b'), 2)
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self.assertEqual(list(r), ['a', 'c'])
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self.assertEqual(list(r.keys()), ['a', 'c'])
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self.assertEqual(list(r.values()), [1, 3])
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self.assertEqual(list(r.items()), [('a', 1), ('c', 3)])
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self.assertEqual(r.pop('b', None), None)
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self.assertRaises(KeyError, r.pop, 'b')
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def test_mod(self):
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curs = self.conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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curs.execute("select 1 as a, 2 as b, 3 as c")
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r = curs.fetchone()
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r['d'] = 4
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self.assertEqual(list(r), ['a', 'b', 'c', 'd'])
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self.assertEqual(list(r.keys()), ['a', 'b', 'c', 'd'])
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self.assertEqual(list(r.values()), [1, 2, 3, 4])
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self.assertEqual(list(
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r.items()), [('a', 1), ('b', 2), ('c', 3), ('d', 4)])
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assert r['a'] == 1
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assert r['b'] == 2
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assert r['c'] == 3
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assert r['d'] == 4
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class NamedTupleCursorTest(ConnectingTestCase):
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def setUp(self):
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ConnectingTestCase.setUp(self)
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self.conn = self.connect(connection_factory=NamedTupleConnection)
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curs = self.conn.cursor()
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if crdb_version(self.conn) is not None:
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curs.execute("SET experimental_enable_temp_tables = 'on'")
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curs.execute("CREATE TEMPORARY TABLE nttest (i int, s text)")
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curs.execute("INSERT INTO nttest VALUES (1, 'foo')")
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curs.execute("INSERT INTO nttest VALUES (2, 'bar')")
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curs.execute("INSERT INTO nttest VALUES (3, 'baz')")
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self.conn.commit()
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@skip_if_crdb("named cursor")
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def test_cursor_args(self):
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cur = self.conn.cursor('foo', cursor_factory=psycopg2.extras.DictCursor)
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self.assertEqual(cur.name, 'foo')
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self.assert_(isinstance(cur, psycopg2.extras.DictCursor))
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def test_fetchone(self):
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curs = self.conn.cursor()
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curs.execute("select * from nttest order by 1")
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t = curs.fetchone()
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self.assertEqual(t[0], 1)
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self.assertEqual(t.i, 1)
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self.assertEqual(t[1], 'foo')
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self.assertEqual(t.s, 'foo')
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self.assertEqual(curs.rownumber, 1)
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self.assertEqual(curs.rowcount, 3)
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def test_fetchmany_noarg(self):
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curs = self.conn.cursor()
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curs.arraysize = 2
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curs.execute("select * from nttest order by 1")
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res = curs.fetchmany()
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self.assertEqual(2, len(res))
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self.assertEqual(res[0].i, 1)
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self.assertEqual(res[0].s, 'foo')
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self.assertEqual(res[1].i, 2)
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self.assertEqual(res[1].s, 'bar')
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self.assertEqual(curs.rownumber, 2)
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self.assertEqual(curs.rowcount, 3)
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def test_fetchmany(self):
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curs = self.conn.cursor()
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curs.execute("select * from nttest order by 1")
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res = curs.fetchmany(2)
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self.assertEqual(2, len(res))
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self.assertEqual(res[0].i, 1)
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self.assertEqual(res[0].s, 'foo')
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self.assertEqual(res[1].i, 2)
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self.assertEqual(res[1].s, 'bar')
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self.assertEqual(curs.rownumber, 2)
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self.assertEqual(curs.rowcount, 3)
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def test_fetchall(self):
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curs = self.conn.cursor()
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curs.execute("select * from nttest order by 1")
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res = curs.fetchall()
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self.assertEqual(3, len(res))
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self.assertEqual(res[0].i, 1)
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self.assertEqual(res[0].s, 'foo')
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self.assertEqual(res[1].i, 2)
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self.assertEqual(res[1].s, 'bar')
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self.assertEqual(res[2].i, 3)
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self.assertEqual(res[2].s, 'baz')
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self.assertEqual(curs.rownumber, 3)
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self.assertEqual(curs.rowcount, 3)
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def test_executemany(self):
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curs = self.conn.cursor()
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curs.executemany("delete from nttest where i = %s",
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[(1,), (2,)])
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curs.execute("select * from nttest order by 1")
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res = curs.fetchall()
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self.assertEqual(1, len(res))
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self.assertEqual(res[0].i, 3)
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self.assertEqual(res[0].s, 'baz')
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def test_iter(self):
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curs = self.conn.cursor()
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curs.execute("select * from nttest order by 1")
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|
i = iter(curs)
|
|
self.assertEqual(curs.rownumber, 0)
|
|
|
|
t = next(i)
|
|
self.assertEqual(t.i, 1)
|
|
self.assertEqual(t.s, 'foo')
|
|
self.assertEqual(curs.rownumber, 1)
|
|
self.assertEqual(curs.rowcount, 3)
|
|
|
|
t = next(i)
|
|
self.assertEqual(t.i, 2)
|
|
self.assertEqual(t.s, 'bar')
|
|
self.assertEqual(curs.rownumber, 2)
|
|
self.assertEqual(curs.rowcount, 3)
|
|
|
|
t = next(i)
|
|
self.assertEqual(t.i, 3)
|
|
self.assertEqual(t.s, 'baz')
|
|
self.assertRaises(StopIteration, next, i)
|
|
self.assertEqual(curs.rownumber, 3)
|
|
self.assertEqual(curs.rowcount, 3)
|
|
|
|
def test_record_updated(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute("select 1 as foo;")
|
|
r = curs.fetchone()
|
|
self.assertEqual(r.foo, 1)
|
|
|
|
curs.execute("select 2 as bar;")
|
|
r = curs.fetchone()
|
|
self.assertEqual(r.bar, 2)
|
|
self.assertRaises(AttributeError, getattr, r, 'foo')
|
|
|
|
def test_no_result_no_surprise(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute("update nttest set s = s")
|
|
self.assertRaises(psycopg2.ProgrammingError, curs.fetchone)
|
|
|
|
curs.execute("update nttest set s = s")
|
|
self.assertRaises(psycopg2.ProgrammingError, curs.fetchall)
|
|
|
|
def test_bad_col_names(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute('select 1 as "foo.bar_baz", 2 as "?column?", 3 as "3"')
|
|
rv = curs.fetchone()
|
|
self.assertEqual(rv.foo_bar_baz, 1)
|
|
self.assertEqual(rv.f_column_, 2)
|
|
self.assertEqual(rv.f3, 3)
|
|
|
|
@skip_before_postgres(8)
|
|
def test_nonascii_name(self):
|
|
curs = self.conn.cursor()
|
|
curs.execute('select 1 as \xe5h\xe9')
|
|
rv = curs.fetchone()
|
|
self.assertEqual(getattr(rv, '\xe5h\xe9'), 1)
|
|
|
|
def test_minimal_generation(self):
|
|
# Instrument the class to verify it gets called the minimum number of times.
|
|
f_orig = NamedTupleCursor._make_nt
|
|
calls = [0]
|
|
|
|
def f_patched(self_):
|
|
calls[0] += 1
|
|
return f_orig(self_)
|
|
|
|
NamedTupleCursor._make_nt = f_patched
|
|
|
|
try:
|
|
curs = self.conn.cursor()
|
|
curs.execute("select * from nttest order by 1")
|
|
curs.fetchone()
|
|
curs.fetchone()
|
|
curs.fetchone()
|
|
self.assertEqual(1, calls[0])
|
|
|
|
curs.execute("select * from nttest order by 1")
|
|
curs.fetchone()
|
|
curs.fetchall()
|
|
self.assertEqual(2, calls[0])
|
|
|
|
curs.execute("select * from nttest order by 1")
|
|
curs.fetchone()
|
|
curs.fetchmany(1)
|
|
self.assertEqual(3, calls[0])
|
|
|
|
finally:
|
|
NamedTupleCursor._make_nt = f_orig
|
|
|
|
@skip_if_crdb("named cursor")
|
|
@skip_before_postgres(8, 0)
|
|
def test_named(self):
|
|
curs = self.conn.cursor('tmp')
|
|
curs.execute("""select i from generate_series(0,9) i""")
|
|
recs = []
|
|
recs.extend(curs.fetchmany(5))
|
|
recs.append(curs.fetchone())
|
|
recs.extend(curs.fetchall())
|
|
self.assertEqual(list(range(10)), [t.i for t in recs])
|
|
|
|
@skip_if_crdb("named cursor")
|
|
def test_named_fetchone(self):
|
|
curs = self.conn.cursor('tmp')
|
|
curs.execute("""select 42 as i""")
|
|
t = curs.fetchone()
|
|
self.assertEqual(t.i, 42)
|
|
|
|
@skip_if_crdb("named cursor")
|
|
def test_named_fetchmany(self):
|
|
curs = self.conn.cursor('tmp')
|
|
curs.execute("""select 42 as i""")
|
|
recs = curs.fetchmany(10)
|
|
self.assertEqual(recs[0].i, 42)
|
|
|
|
@skip_if_crdb("named cursor")
|
|
def test_named_fetchall(self):
|
|
curs = self.conn.cursor('tmp')
|
|
curs.execute("""select 42 as i""")
|
|
recs = curs.fetchall()
|
|
self.assertEqual(recs[0].i, 42)
|
|
|
|
@skip_if_crdb("named cursor")
|
|
@skip_before_postgres(8, 2)
|
|
def test_not_greedy(self):
|
|
curs = self.conn.cursor('tmp')
|
|
curs.itersize = 2
|
|
curs.execute("""select clock_timestamp() as ts from generate_series(1,3)""")
|
|
recs = []
|
|
for t in curs:
|
|
time.sleep(0.01)
|
|
recs.append(t)
|
|
|
|
# check that the dataset was not fetched in a single gulp
|
|
self.assert_(recs[1].ts - recs[0].ts < timedelta(seconds=0.005))
|
|
self.assert_(recs[2].ts - recs[1].ts > timedelta(seconds=0.0099))
|
|
|
|
@skip_if_crdb("named cursor")
|
|
@skip_before_postgres(8, 0)
|
|
def test_named_rownumber(self):
|
|
curs = self.conn.cursor('tmp')
|
|
# Only checking for dataset < itersize:
|
|
# see CursorTests.test_iter_named_cursor_rownumber
|
|
curs.itersize = 4
|
|
curs.execute("""select * from generate_series(1,3)""")
|
|
for i, t in enumerate(curs):
|
|
self.assertEqual(i + 1, curs.rownumber)
|
|
|
|
def test_cache(self):
|
|
NamedTupleCursor._cached_make_nt.cache_clear()
|
|
|
|
curs = self.conn.cursor()
|
|
curs.execute("select 10 as a, 20 as b")
|
|
r1 = curs.fetchone()
|
|
curs.execute("select 10 as a, 20 as c")
|
|
r2 = curs.fetchone()
|
|
|
|
# Get a new cursor to check that the cache works across multiple ones
|
|
curs = self.conn.cursor()
|
|
curs.execute("select 10 as a, 30 as b")
|
|
r3 = curs.fetchone()
|
|
|
|
self.assert_(type(r1) is type(r3))
|
|
self.assert_(type(r1) is not type(r2))
|
|
|
|
cache_info = NamedTupleCursor._cached_make_nt.cache_info()
|
|
self.assertEqual(cache_info.hits, 1)
|
|
self.assertEqual(cache_info.misses, 2)
|
|
self.assertEqual(cache_info.currsize, 2)
|
|
|
|
def test_max_cache(self):
|
|
old_func = NamedTupleCursor._cached_make_nt
|
|
NamedTupleCursor._cached_make_nt = \
|
|
lru_cache(8)(NamedTupleCursor._cached_make_nt.__wrapped__)
|
|
try:
|
|
recs = []
|
|
curs = self.conn.cursor()
|
|
for i in range(10):
|
|
curs.execute(f"select 1 as f{i}")
|
|
recs.append(curs.fetchone())
|
|
|
|
# Still in cache
|
|
curs.execute("select 1 as f9")
|
|
rec = curs.fetchone()
|
|
self.assert_(any(type(r) is type(rec) for r in recs))
|
|
|
|
# Gone from cache
|
|
curs.execute("select 1 as f0")
|
|
rec = curs.fetchone()
|
|
self.assert_(all(type(r) is not type(rec) for r in recs))
|
|
|
|
finally:
|
|
NamedTupleCursor._cached_make_nt = old_func
|
|
|
|
|
|
def test_suite():
|
|
return unittest.TestLoader().loadTestsFromName(__name__)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|