mirror of https://github.com/python/cpython
299 lines
11 KiB
Python
299 lines
11 KiB
Python
# pysqlite2/test/factory.py: tests for the various factories in pysqlite
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#
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# Copyright (C) 2005-2007 Gerhard Häring <gh@ghaering.de>
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#
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# This file is part of pysqlite.
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#
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# This software is provided 'as-is', without any express or implied
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# warranty. In no event will the authors be held liable for any damages
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# arising from the use of this software.
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#
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# Permission is granted to anyone to use this software for any purpose,
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# including commercial applications, and to alter it and redistribute it
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# freely, subject to the following restrictions:
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#
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# 1. The origin of this software must not be misrepresented; you must not
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# claim that you wrote the original software. If you use this software
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# in a product, an acknowledgment in the product documentation would be
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# appreciated but is not required.
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# 2. Altered source versions must be plainly marked as such, and must not be
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# misrepresented as being the original software.
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# 3. This notice may not be removed or altered from any source distribution.
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import unittest
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import sqlite3 as sqlite
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from collections.abc import Sequence
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def dict_factory(cursor, row):
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d = {}
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for idx, col in enumerate(cursor.description):
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d[col[0]] = row[idx]
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return d
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class MyCursor(sqlite.Cursor):
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def __init__(self, *args, **kwargs):
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sqlite.Cursor.__init__(self, *args, **kwargs)
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self.row_factory = dict_factory
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class ConnectionFactoryTests(unittest.TestCase):
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def test_connection_factories(self):
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class DefectFactory(sqlite.Connection):
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def __init__(self, *args, **kwargs):
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return None
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class OkFactory(sqlite.Connection):
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def __init__(self, *args, **kwargs):
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sqlite.Connection.__init__(self, *args, **kwargs)
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for factory in DefectFactory, OkFactory:
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with self.subTest(factory=factory):
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con = sqlite.connect(":memory:", factory=factory)
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self.assertIsInstance(con, factory)
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class CursorFactoryTests(unittest.TestCase):
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def setUp(self):
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self.con = sqlite.connect(":memory:")
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def tearDown(self):
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self.con.close()
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def test_is_instance(self):
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cur = self.con.cursor()
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self.assertIsInstance(cur, sqlite.Cursor)
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cur = self.con.cursor(MyCursor)
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self.assertIsInstance(cur, MyCursor)
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cur = self.con.cursor(factory=lambda con: MyCursor(con))
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self.assertIsInstance(cur, MyCursor)
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def test_invalid_factory(self):
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# not a callable at all
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self.assertRaises(TypeError, self.con.cursor, None)
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# invalid callable with not exact one argument
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self.assertRaises(TypeError, self.con.cursor, lambda: None)
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# invalid callable returning non-cursor
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self.assertRaises(TypeError, self.con.cursor, lambda con: None)
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class RowFactoryTestsBackwardsCompat(unittest.TestCase):
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def setUp(self):
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self.con = sqlite.connect(":memory:")
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def test_is_produced_by_factory(self):
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cur = self.con.cursor(factory=MyCursor)
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cur.execute("select 4+5 as foo")
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row = cur.fetchone()
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self.assertIsInstance(row, dict)
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cur.close()
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def tearDown(self):
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self.con.close()
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class RowFactoryTests(unittest.TestCase):
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def setUp(self):
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self.con = sqlite.connect(":memory:")
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def test_custom_factory(self):
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self.con.row_factory = lambda cur, row: list(row)
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row = self.con.execute("select 1, 2").fetchone()
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self.assertIsInstance(row, list)
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def test_sqlite_row_index(self):
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self.con.row_factory = sqlite.Row
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row = self.con.execute("select 1 as a_1, 2 as b").fetchone()
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self.assertIsInstance(row, sqlite.Row)
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self.assertEqual(row["a_1"], 1, "by name: wrong result for column 'a_1'")
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self.assertEqual(row["b"], 2, "by name: wrong result for column 'b'")
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self.assertEqual(row["A_1"], 1, "by name: wrong result for column 'A_1'")
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self.assertEqual(row["B"], 2, "by name: wrong result for column 'B'")
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self.assertEqual(row[0], 1, "by index: wrong result for column 0")
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self.assertEqual(row[1], 2, "by index: wrong result for column 1")
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self.assertEqual(row[-1], 2, "by index: wrong result for column -1")
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self.assertEqual(row[-2], 1, "by index: wrong result for column -2")
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with self.assertRaises(IndexError):
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row['c']
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with self.assertRaises(IndexError):
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row['a_\x11']
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with self.assertRaises(IndexError):
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row['a\x7f1']
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with self.assertRaises(IndexError):
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row[2]
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with self.assertRaises(IndexError):
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row[-3]
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with self.assertRaises(IndexError):
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row[2**1000]
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with self.assertRaises(IndexError):
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row[complex()] # index must be int or string
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def test_sqlite_row_index_unicode(self):
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self.con.row_factory = sqlite.Row
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row = self.con.execute("select 1 as \xff").fetchone()
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self.assertEqual(row["\xff"], 1)
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with self.assertRaises(IndexError):
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row['\u0178']
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with self.assertRaises(IndexError):
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row['\xdf']
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def test_sqlite_row_slice(self):
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# A sqlite.Row can be sliced like a list.
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self.con.row_factory = sqlite.Row
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row = self.con.execute("select 1, 2, 3, 4").fetchone()
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self.assertEqual(row[0:0], ())
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self.assertEqual(row[0:1], (1,))
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self.assertEqual(row[1:3], (2, 3))
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self.assertEqual(row[3:1], ())
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# Explicit bounds are optional.
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self.assertEqual(row[1:], (2, 3, 4))
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self.assertEqual(row[:3], (1, 2, 3))
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# Slices can use negative indices.
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self.assertEqual(row[-2:-1], (3,))
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self.assertEqual(row[-2:], (3, 4))
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# Slicing supports steps.
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self.assertEqual(row[0:4:2], (1, 3))
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self.assertEqual(row[3:0:-2], (4, 2))
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def test_sqlite_row_iter(self):
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"""Checks if the row object is iterable"""
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self.con.row_factory = sqlite.Row
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row = self.con.execute("select 1 as a, 2 as b").fetchone()
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for col in row:
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pass
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def test_sqlite_row_as_tuple(self):
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"""Checks if the row object can be converted to a tuple"""
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self.con.row_factory = sqlite.Row
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row = self.con.execute("select 1 as a, 2 as b").fetchone()
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t = tuple(row)
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self.assertEqual(t, (row['a'], row['b']))
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def test_sqlite_row_as_dict(self):
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"""Checks if the row object can be correctly converted to a dictionary"""
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self.con.row_factory = sqlite.Row
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row = self.con.execute("select 1 as a, 2 as b").fetchone()
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d = dict(row)
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self.assertEqual(d["a"], row["a"])
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self.assertEqual(d["b"], row["b"])
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def test_sqlite_row_hash_cmp(self):
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"""Checks if the row object compares and hashes correctly"""
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self.con.row_factory = sqlite.Row
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row_1 = self.con.execute("select 1 as a, 2 as b").fetchone()
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row_2 = self.con.execute("select 1 as a, 2 as b").fetchone()
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row_3 = self.con.execute("select 1 as a, 3 as b").fetchone()
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row_4 = self.con.execute("select 1 as b, 2 as a").fetchone()
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row_5 = self.con.execute("select 2 as b, 1 as a").fetchone()
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self.assertTrue(row_1 == row_1)
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self.assertTrue(row_1 == row_2)
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self.assertFalse(row_1 == row_3)
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self.assertFalse(row_1 == row_4)
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self.assertFalse(row_1 == row_5)
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self.assertFalse(row_1 == object())
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self.assertFalse(row_1 != row_1)
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self.assertFalse(row_1 != row_2)
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self.assertTrue(row_1 != row_3)
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self.assertTrue(row_1 != row_4)
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self.assertTrue(row_1 != row_5)
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self.assertTrue(row_1 != object())
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with self.assertRaises(TypeError):
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row_1 > row_2
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with self.assertRaises(TypeError):
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row_1 < row_2
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with self.assertRaises(TypeError):
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row_1 >= row_2
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with self.assertRaises(TypeError):
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row_1 <= row_2
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self.assertEqual(hash(row_1), hash(row_2))
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def test_sqlite_row_as_sequence(self):
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""" Checks if the row object can act like a sequence """
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self.con.row_factory = sqlite.Row
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row = self.con.execute("select 1 as a, 2 as b").fetchone()
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as_tuple = tuple(row)
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self.assertEqual(list(reversed(row)), list(reversed(as_tuple)))
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self.assertIsInstance(row, Sequence)
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def test_fake_cursor_class(self):
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# Issue #24257: Incorrect use of PyObject_IsInstance() caused
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# segmentation fault.
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# Issue #27861: Also applies for cursor factory.
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class FakeCursor(str):
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__class__ = sqlite.Cursor
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self.con.row_factory = sqlite.Row
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self.assertRaises(TypeError, self.con.cursor, FakeCursor)
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self.assertRaises(TypeError, sqlite.Row, FakeCursor(), ())
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def tearDown(self):
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self.con.close()
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class TextFactoryTests(unittest.TestCase):
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def setUp(self):
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self.con = sqlite.connect(":memory:")
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def test_unicode(self):
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austria = "Österreich"
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row = self.con.execute("select ?", (austria,)).fetchone()
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self.assertEqual(type(row[0]), str, "type of row[0] must be unicode")
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def test_string(self):
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self.con.text_factory = bytes
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austria = "Österreich"
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row = self.con.execute("select ?", (austria,)).fetchone()
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self.assertEqual(type(row[0]), bytes, "type of row[0] must be bytes")
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self.assertEqual(row[0], austria.encode("utf-8"), "column must equal original data in UTF-8")
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def test_custom(self):
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self.con.text_factory = lambda x: str(x, "utf-8", "ignore")
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austria = "Österreich"
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row = self.con.execute("select ?", (austria,)).fetchone()
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self.assertEqual(type(row[0]), str, "type of row[0] must be unicode")
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self.assertTrue(row[0].endswith("reich"), "column must contain original data")
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def tearDown(self):
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self.con.close()
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class TextFactoryTestsWithEmbeddedZeroBytes(unittest.TestCase):
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def setUp(self):
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self.con = sqlite.connect(":memory:")
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self.con.execute("create table test (value text)")
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self.con.execute("insert into test (value) values (?)", ("a\x00b",))
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def test_string(self):
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# text_factory defaults to str
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row = self.con.execute("select value from test").fetchone()
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self.assertIs(type(row[0]), str)
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self.assertEqual(row[0], "a\x00b")
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def test_bytes(self):
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self.con.text_factory = bytes
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row = self.con.execute("select value from test").fetchone()
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self.assertIs(type(row[0]), bytes)
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self.assertEqual(row[0], b"a\x00b")
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def test_bytearray(self):
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self.con.text_factory = bytearray
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row = self.con.execute("select value from test").fetchone()
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self.assertIs(type(row[0]), bytearray)
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self.assertEqual(row[0], b"a\x00b")
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def test_custom(self):
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# A custom factory should receive a bytes argument
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self.con.text_factory = lambda x: x
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row = self.con.execute("select value from test").fetchone()
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self.assertIs(type(row[0]), bytes)
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self.assertEqual(row[0], b"a\x00b")
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def tearDown(self):
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self.con.close()
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if __name__ == "__main__":
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unittest.main()
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