Removed the Requirement to Install Python and NodeJS (Now Bundled with Borealis)

Dependencies/Python/Lib/test/test_sqlite3/test_userfunctions.py

@@ -0,0 +1,853 @@
+# pysqlite2/test/userfunctions.py: tests for user-defined functions and
+#                                  aggregates.
+#
+# Copyright (C) 2005-2007 Gerhard Häring <gh@ghaering.de>
+#
+# This file is part of pysqlite.
+#
+# This software is provided 'as-is', without any express or implied
+# warranty.  In no event will the authors be held liable for any damages
+# arising from the use of this software.
+#
+# Permission is granted to anyone to use this software for any purpose,
+# including commercial applications, and to alter it and redistribute it
+# freely, subject to the following restrictions:
+#
+# 1. The origin of this software must not be misrepresented; you must not
+#    claim that you wrote the original software. If you use this software
+#    in a product, an acknowledgment in the product documentation would be
+#    appreciated but is not required.
+# 2. Altered source versions must be plainly marked as such, and must not be
+#    misrepresented as being the original software.
+# 3. This notice may not be removed or altered from any source distribution.
+
+import sys
+import unittest
+import sqlite3 as sqlite
+
+from unittest.mock import Mock, patch
+from test.support import bigmemtest, gc_collect
+
+from .util import cx_limit, memory_database
+from .util import with_tracebacks
+
+
+def func_returntext():
+    return "foo"
+def func_returntextwithnull():
+    return "1\x002"
+def func_returnunicode():
+    return "bar"
+def func_returnint():
+    return 42
+def func_returnfloat():
+    return 3.14
+def func_returnnull():
+    return None
+def func_returnblob():
+    return b"blob"
+def func_returnlonglong():
+    return 1<<31
+def func_raiseexception():
+    5/0
+def func_memoryerror():
+    raise MemoryError
+def func_overflowerror():
+    raise OverflowError
+
+class AggrNoStep:
+    def __init__(self):
+        pass
+
+    def finalize(self):
+        return 1
+
+class AggrNoFinalize:
+    def __init__(self):
+        pass
+
+    def step(self, x):
+        pass
+
+class AggrExceptionInInit:
+    def __init__(self):
+        5/0
+
+    def step(self, x):
+        pass
+
+    def finalize(self):
+        pass
+
+class AggrExceptionInStep:
+    def __init__(self):
+        pass
+
+    def step(self, x):
+        5/0
+
+    def finalize(self):
+        return 42
+
+class AggrExceptionInFinalize:
+    def __init__(self):
+        pass
+
+    def step(self, x):
+        pass
+
+    def finalize(self):
+        5/0
+
+class AggrCheckType:
+    def __init__(self):
+        self.val = None
+
+    def step(self, whichType, val):
+        theType = {"str": str, "int": int, "float": float, "None": type(None),
+                   "blob": bytes}
+        self.val = int(theType[whichType] is type(val))
+
+    def finalize(self):
+        return self.val
+
+class AggrCheckTypes:
+    def __init__(self):
+        self.val = 0
+
+    def step(self, whichType, *vals):
+        theType = {"str": str, "int": int, "float": float, "None": type(None),
+                   "blob": bytes}
+        for val in vals:
+            self.val += int(theType[whichType] is type(val))
+
+    def finalize(self):
+        return self.val
+
+class AggrSum:
+    def __init__(self):
+        self.val = 0.0
+
+    def step(self, val):
+        self.val += val
+
+    def finalize(self):
+        return self.val
+
+class AggrText:
+    def __init__(self):
+        self.txt = ""
+    def step(self, txt):
+        self.txt = self.txt + txt
+    def finalize(self):
+        return self.txt
+
+
+class FunctionTests(unittest.TestCase):
+    def setUp(self):
+        self.con = sqlite.connect(":memory:")
+
+        self.con.create_function("returntext", 0, func_returntext)
+        self.con.create_function("returntextwithnull", 0, func_returntextwithnull)
+        self.con.create_function("returnunicode", 0, func_returnunicode)
+        self.con.create_function("returnint", 0, func_returnint)
+        self.con.create_function("returnfloat", 0, func_returnfloat)
+        self.con.create_function("returnnull", 0, func_returnnull)
+        self.con.create_function("returnblob", 0, func_returnblob)
+        self.con.create_function("returnlonglong", 0, func_returnlonglong)
+        self.con.create_function("returnnan", 0, lambda: float("nan"))
+        self.con.create_function("return_noncont_blob", 0,
+                                 lambda: memoryview(b"blob")[::2])
+        self.con.create_function("raiseexception", 0, func_raiseexception)
+        self.con.create_function("memoryerror", 0, func_memoryerror)
+        self.con.create_function("overflowerror", 0, func_overflowerror)
+
+        self.con.create_function("isblob", 1, lambda x: isinstance(x, bytes))
+        self.con.create_function("isnone", 1, lambda x: x is None)
+        self.con.create_function("spam", -1, lambda *x: len(x))
+        self.con.execute("create table test(t text)")
+
+    def tearDown(self):
+        self.con.close()
+
+    def test_func_error_on_create(self):
+        with self.assertRaises(sqlite.OperationalError):
+            self.con.create_function("bla", -100, lambda x: 2*x)
+
+    def test_func_too_many_args(self):
+        category = sqlite.SQLITE_LIMIT_FUNCTION_ARG
+        msg = "too many arguments on function"
+        with cx_limit(self.con, category=category, limit=1):
+            self.con.execute("select abs(-1)");
+            with self.assertRaisesRegex(sqlite.OperationalError, msg):
+                self.con.execute("select max(1, 2)");
+
+    def test_func_ref_count(self):
+        def getfunc():
+            def f():
+                return 1
+            return f
+        f = getfunc()
+        globals()["foo"] = f
+        # self.con.create_function("reftest", 0, getfunc())
+        self.con.create_function("reftest", 0, f)
+        cur = self.con.cursor()
+        cur.execute("select reftest()")
+
+    def test_func_return_text(self):
+        cur = self.con.cursor()
+        cur.execute("select returntext()")
+        val = cur.fetchone()[0]
+        self.assertEqual(type(val), str)
+        self.assertEqual(val, "foo")
+
+    def test_func_return_text_with_null_char(self):
+        cur = self.con.cursor()
+        res = cur.execute("select returntextwithnull()").fetchone()[0]
+        self.assertEqual(type(res), str)
+        self.assertEqual(res, "1\x002")
+
+    def test_func_return_unicode(self):
+        cur = self.con.cursor()
+        cur.execute("select returnunicode()")
+        val = cur.fetchone()[0]
+        self.assertEqual(type(val), str)
+        self.assertEqual(val, "bar")
+
+    def test_func_return_int(self):
+        cur = self.con.cursor()
+        cur.execute("select returnint()")
+        val = cur.fetchone()[0]
+        self.assertEqual(type(val), int)
+        self.assertEqual(val, 42)
+
+    def test_func_return_float(self):
+        cur = self.con.cursor()
+        cur.execute("select returnfloat()")
+        val = cur.fetchone()[0]
+        self.assertEqual(type(val), float)
+        if val < 3.139 or val > 3.141:
+            self.fail("wrong value")
+
+    def test_func_return_null(self):
+        cur = self.con.cursor()
+        cur.execute("select returnnull()")
+        val = cur.fetchone()[0]
+        self.assertEqual(type(val), type(None))
+        self.assertEqual(val, None)
+
+    def test_func_return_blob(self):
+        cur = self.con.cursor()
+        cur.execute("select returnblob()")
+        val = cur.fetchone()[0]
+        self.assertEqual(type(val), bytes)
+        self.assertEqual(val, b"blob")
+
+    def test_func_return_long_long(self):
+        cur = self.con.cursor()
+        cur.execute("select returnlonglong()")
+        val = cur.fetchone()[0]
+        self.assertEqual(val, 1<<31)
+
+    def test_func_return_nan(self):
+        cur = self.con.cursor()
+        cur.execute("select returnnan()")
+        self.assertIsNone(cur.fetchone()[0])
+
+    @with_tracebacks(ZeroDivisionError, name="func_raiseexception")
+    def test_func_exception(self):
+        cur = self.con.cursor()
+        with self.assertRaises(sqlite.OperationalError) as cm:
+            cur.execute("select raiseexception()")
+            cur.fetchone()
+        self.assertEqual(str(cm.exception), 'user-defined function raised exception')
+
+    @with_tracebacks(MemoryError, name="func_memoryerror")
+    def test_func_memory_error(self):
+        cur = self.con.cursor()
+        with self.assertRaises(MemoryError):
+            cur.execute("select memoryerror()")
+            cur.fetchone()
+
+    @with_tracebacks(OverflowError, name="func_overflowerror")
+    def test_func_overflow_error(self):
+        cur = self.con.cursor()
+        with self.assertRaises(sqlite.DataError):
+            cur.execute("select overflowerror()")
+            cur.fetchone()
+
+    def test_any_arguments(self):
+        cur = self.con.cursor()
+        cur.execute("select spam(?, ?)", (1, 2))
+        val = cur.fetchone()[0]
+        self.assertEqual(val, 2)
+
+    def test_empty_blob(self):
+        cur = self.con.execute("select isblob(x'')")
+        self.assertTrue(cur.fetchone()[0])
+
+    def test_nan_float(self):
+        cur = self.con.execute("select isnone(?)", (float("nan"),))
+        # SQLite has no concept of nan; it is converted to NULL
+        self.assertTrue(cur.fetchone()[0])
+
+    def test_too_large_int(self):
+        err = "Python int too large to convert to SQLite INTEGER"
+        self.assertRaisesRegex(OverflowError, err, self.con.execute,
+                               "select spam(?)", (1 << 65,))
+
+    def test_non_contiguous_blob(self):
+        self.assertRaisesRegex(BufferError,
+                               "underlying buffer is not C-contiguous",
+                               self.con.execute, "select spam(?)",
+                               (memoryview(b"blob")[::2],))
+
+    @with_tracebacks(BufferError, regex="buffer.*contiguous")
+    def test_return_non_contiguous_blob(self):
+        with self.assertRaises(sqlite.OperationalError):
+            cur = self.con.execute("select return_noncont_blob()")
+            cur.fetchone()
+
+    def test_param_surrogates(self):
+        self.assertRaisesRegex(UnicodeEncodeError, "surrogates not allowed",
+                               self.con.execute, "select spam(?)",
+                               ("\ud803\ude6d",))
+
+    def test_func_params(self):
+        results = []
+        def append_result(arg):
+            results.append((arg, type(arg)))
+        self.con.create_function("test_params", 1, append_result)
+
+        dataset = [
+            (42, int),
+            (-1, int),
+            (1234567890123456789, int),
+            (4611686018427387905, int),  # 63-bit int with non-zero low bits
+            (3.14, float),
+            (float('inf'), float),
+            ("text", str),
+            ("1\x002", str),
+            ("\u02e2q\u02e1\u2071\u1d57\u1d49", str),
+            (b"blob", bytes),
+            (bytearray(range(2)), bytes),
+            (memoryview(b"blob"), bytes),
+            (None, type(None)),
+        ]
+        for val, _ in dataset:
+            cur = self.con.execute("select test_params(?)", (val,))
+            cur.fetchone()
+        self.assertEqual(dataset, results)
+
+    # Regarding deterministic functions:
+    #
+    # Between 3.8.3 and 3.15.0, deterministic functions were only used to
+    # optimize inner loops. From 3.15.0 and onward, deterministic functions
+    # were permitted in WHERE clauses of partial indices, which allows testing
+    # based on syntax, iso. the query optimizer.
+    def test_func_non_deterministic(self):
+        mock = Mock(return_value=None)
+        self.con.create_function("nondeterministic", 0, mock, deterministic=False)
+        with self.assertRaises(sqlite.OperationalError):
+            self.con.execute("create index t on test(t) where nondeterministic() is not null")
+
+    def test_func_deterministic(self):
+        mock = Mock(return_value=None)
+        self.con.create_function("deterministic", 0, mock, deterministic=True)
+        try:
+            self.con.execute("create index t on test(t) where deterministic() is not null")
+        except sqlite.OperationalError:
+            self.fail("Unexpected failure while creating partial index")
+
+    def test_func_deterministic_keyword_only(self):
+        with self.assertRaises(TypeError):
+            self.con.create_function("deterministic", 0, int, True)
+
+    def test_function_destructor_via_gc(self):
+        # See bpo-44304: The destructor of the user function can
+        # crash if is called without the GIL from the gc functions
+        def md5sum(t):
+            return
+
+        with memory_database() as dest:
+            dest.create_function("md5", 1, md5sum)
+            x = dest("create table lang (name, first_appeared)")
+            del md5sum, dest
+
+            y = [x]
+            y.append(y)
+
+            del x,y
+            gc_collect()
+
+    @with_tracebacks(OverflowError)
+    def test_func_return_too_large_int(self):
+        cur = self.con.cursor()
+        msg = "string or blob too big"
+        for value in 2**63, -2**63-1, 2**64:
+            self.con.create_function("largeint", 0, lambda value=value: value)
+            with self.assertRaisesRegex(sqlite.DataError, msg):
+                cur.execute("select largeint()")
+
+    @with_tracebacks(UnicodeEncodeError, "surrogates not allowed", "chr")
+    def test_func_return_text_with_surrogates(self):
+        cur = self.con.cursor()
+        self.con.create_function("pychr", 1, chr)
+        for value in 0xd8ff, 0xdcff:
+            with self.assertRaises(sqlite.OperationalError):
+                cur.execute("select pychr(?)", (value,))
+
+    @unittest.skipUnless(sys.maxsize > 2**32, 'requires 64bit platform')
+    @bigmemtest(size=2**31, memuse=3, dry_run=False)
+    def test_func_return_too_large_text(self, size):
+        cur = self.con.cursor()
+        for size in 2**31-1, 2**31:
+            self.con.create_function("largetext", 0, lambda size=size: "b" * size)
+            with self.assertRaises(sqlite.DataError):
+                cur.execute("select largetext()")
+
+    @unittest.skipUnless(sys.maxsize > 2**32, 'requires 64bit platform')
+    @bigmemtest(size=2**31, memuse=2, dry_run=False)
+    def test_func_return_too_large_blob(self, size):
+        cur = self.con.cursor()
+        for size in 2**31-1, 2**31:
+            self.con.create_function("largeblob", 0, lambda size=size: b"b" * size)
+            with self.assertRaises(sqlite.DataError):
+                cur.execute("select largeblob()")
+
+    def test_func_return_illegal_value(self):
+        self.con.create_function("badreturn", 0, lambda: self)
+        msg = "user-defined function raised exception"
+        self.assertRaisesRegex(sqlite.OperationalError, msg,
+                               self.con.execute, "select badreturn()")
+
+    def test_func_keyword_args(self):
+        regex = (
+            r"Passing keyword arguments 'name', 'narg' and 'func' to "
+            r"_sqlite3.Connection.create_function\(\) is deprecated. "
+            r"Parameters 'name', 'narg' and 'func' will become "
+            r"positional-only in Python 3.15."
+        )
+
+        def noop():
+            return None
+
+        with self.assertWarnsRegex(DeprecationWarning, regex) as cm:
+            self.con.create_function("noop", 0, func=noop)
+        self.assertEqual(cm.filename, __file__)
+
+        with self.assertWarnsRegex(DeprecationWarning, regex) as cm:
+            self.con.create_function("noop", narg=0, func=noop)
+        self.assertEqual(cm.filename, __file__)
+
+        with self.assertWarnsRegex(DeprecationWarning, regex) as cm:
+            self.con.create_function(name="noop", narg=0, func=noop)
+        self.assertEqual(cm.filename, __file__)
+
+
+class WindowSumInt:
+    def __init__(self):
+        self.count = 0
+
+    def step(self, value):
+        self.count += value
+
+    def value(self):
+        return self.count
+
+    def inverse(self, value):
+        self.count -= value
+
+    def finalize(self):
+        return self.count
+
+class BadWindow(Exception):
+    pass
+
+
+@unittest.skipIf(sqlite.sqlite_version_info < (3, 25, 0),
+                 "Requires SQLite 3.25.0 or newer")
+class WindowFunctionTests(unittest.TestCase):
+    def setUp(self):
+        self.con = sqlite.connect(":memory:")
+        self.cur = self.con.cursor()
+
+        # Test case taken from https://www.sqlite.org/windowfunctions.html#udfwinfunc
+        values = [
+            ("a", 4),
+            ("b", 5),
+            ("c", 3),
+            ("d", 8),
+            ("e", 1),
+        ]
+        with self.con:
+            self.con.execute("create table test(x, y)")
+            self.con.executemany("insert into test values(?, ?)", values)
+        self.expected = [
+            ("a", 9),
+            ("b", 12),
+            ("c", 16),
+            ("d", 12),
+            ("e", 9),
+        ]
+        self.query = """
+            select x, %s(y) over (
+                order by x rows between 1 preceding and 1 following
+            ) as sum_y
+            from test order by x
+        """
+        self.con.create_window_function("sumint", 1, WindowSumInt)
+
+    def tearDown(self):
+        self.cur.close()
+        self.con.close()
+
+    def test_win_sum_int(self):
+        self.cur.execute(self.query % "sumint")
+        self.assertEqual(self.cur.fetchall(), self.expected)
+
+    def test_win_error_on_create(self):
+        self.assertRaises(sqlite.ProgrammingError,
+                          self.con.create_window_function,
+                          "shouldfail", -100, WindowSumInt)
+
+    @with_tracebacks(BadWindow)
+    def test_win_exception_in_method(self):
+        for meth in "__init__", "step", "value", "inverse":
+            with self.subTest(meth=meth):
+                with patch.object(WindowSumInt, meth, side_effect=BadWindow):
+                    name = f"exc_{meth}"
+                    self.con.create_window_function(name, 1, WindowSumInt)
+                    msg = f"'{meth}' method raised error"
+                    with self.assertRaisesRegex(sqlite.OperationalError, msg):
+                        self.cur.execute(self.query % name)
+                        self.cur.fetchall()
+
+    @with_tracebacks(BadWindow)
+    def test_win_exception_in_finalize(self):
+        # Note: SQLite does not (as of version 3.38.0) propagate finalize
+        # callback errors to sqlite3_step(); this implies that OperationalError
+        # is _not_ raised.
+        with patch.object(WindowSumInt, "finalize", side_effect=BadWindow):
+            name = "exception_in_finalize"
+            self.con.create_window_function(name, 1, WindowSumInt)
+            self.cur.execute(self.query % name)
+            self.cur.fetchall()
+
+    @with_tracebacks(AttributeError)
+    def test_win_missing_method(self):
+        class MissingValue:
+            def step(self, x): pass
+            def inverse(self, x): pass
+            def finalize(self): return 42
+
+        class MissingInverse:
+            def step(self, x): pass
+            def value(self): return 42
+            def finalize(self): return 42
+
+        class MissingStep:
+            def value(self): return 42
+            def inverse(self, x): pass
+            def finalize(self): return 42
+
+        dataset = (
+            ("step", MissingStep),
+            ("value", MissingValue),
+            ("inverse", MissingInverse),
+        )
+        for meth, cls in dataset:
+            with self.subTest(meth=meth, cls=cls):
+                name = f"exc_{meth}"
+                self.con.create_window_function(name, 1, cls)
+                with self.assertRaisesRegex(sqlite.OperationalError,
+                                            f"'{meth}' method not defined"):
+                    self.cur.execute(self.query % name)
+                    self.cur.fetchall()
+
+    @with_tracebacks(AttributeError)
+    def test_win_missing_finalize(self):
+        # Note: SQLite does not (as of version 3.38.0) propagate finalize
+        # callback errors to sqlite3_step(); this implies that OperationalError
+        # is _not_ raised.
+        class MissingFinalize:
+            def step(self, x): pass
+            def value(self): return 42
+            def inverse(self, x): pass
+
+        name = "missing_finalize"
+        self.con.create_window_function(name, 1, MissingFinalize)
+        self.cur.execute(self.query % name)
+        self.cur.fetchall()
+
+    def test_win_clear_function(self):
+        self.con.create_window_function("sumint", 1, None)
+        self.assertRaises(sqlite.OperationalError, self.cur.execute,
+                          self.query % "sumint")
+
+    def test_win_redefine_function(self):
+        # Redefine WindowSumInt; adjust the expected results accordingly.
+        class Redefined(WindowSumInt):
+            def step(self, value): self.count += value * 2
+            def inverse(self, value): self.count -= value * 2
+        expected = [(v[0], v[1]*2) for v in self.expected]
+
+        self.con.create_window_function("sumint", 1, Redefined)
+        self.cur.execute(self.query % "sumint")
+        self.assertEqual(self.cur.fetchall(), expected)
+
+    def test_win_error_value_return(self):
+        class ErrorValueReturn:
+            def __init__(self): pass
+            def step(self, x): pass
+            def value(self): return 1 << 65
+
+        self.con.create_window_function("err_val_ret", 1, ErrorValueReturn)
+        self.assertRaisesRegex(sqlite.DataError, "string or blob too big",
+                               self.cur.execute, self.query % "err_val_ret")
+
+
+class AggregateTests(unittest.TestCase):
+    def setUp(self):
+        self.con = sqlite.connect(":memory:")
+        cur = self.con.cursor()
+        cur.execute("""
+            create table test(
+                t text,
+                i integer,
+                f float,
+                n,
+                b blob
+                )
+            """)
+        cur.execute("insert into test(t, i, f, n, b) values (?, ?, ?, ?, ?)",
+            ("foo", 5, 3.14, None, memoryview(b"blob"),))
+        cur.close()
+
+        self.con.create_aggregate("nostep", 1, AggrNoStep)
+        self.con.create_aggregate("nofinalize", 1, AggrNoFinalize)
+        self.con.create_aggregate("excInit", 1, AggrExceptionInInit)
+        self.con.create_aggregate("excStep", 1, AggrExceptionInStep)
+        self.con.create_aggregate("excFinalize", 1, AggrExceptionInFinalize)
+        self.con.create_aggregate("checkType", 2, AggrCheckType)
+        self.con.create_aggregate("checkTypes", -1, AggrCheckTypes)
+        self.con.create_aggregate("mysum", 1, AggrSum)
+        self.con.create_aggregate("aggtxt", 1, AggrText)
+
+    def tearDown(self):
+        self.con.close()
+
+    def test_aggr_error_on_create(self):
+        with self.assertRaises(sqlite.OperationalError):
+            self.con.create_function("bla", -100, AggrSum)
+
+    @with_tracebacks(AttributeError, name="AggrNoStep")
+    def test_aggr_no_step(self):
+        cur = self.con.cursor()
+        with self.assertRaises(sqlite.OperationalError) as cm:
+            cur.execute("select nostep(t) from test")
+        self.assertEqual(str(cm.exception),
+                         "user-defined aggregate's 'step' method not defined")
+
+    def test_aggr_no_finalize(self):
+        cur = self.con.cursor()
+        msg = "user-defined aggregate's 'finalize' method not defined"
+        with self.assertRaisesRegex(sqlite.OperationalError, msg):
+            cur.execute("select nofinalize(t) from test")
+            val = cur.fetchone()[0]
+
+    @with_tracebacks(ZeroDivisionError, name="AggrExceptionInInit")
+    def test_aggr_exception_in_init(self):
+        cur = self.con.cursor()
+        with self.assertRaises(sqlite.OperationalError) as cm:
+            cur.execute("select excInit(t) from test")
+            val = cur.fetchone()[0]
+        self.assertEqual(str(cm.exception), "user-defined aggregate's '__init__' method raised error")
+
+    @with_tracebacks(ZeroDivisionError, name="AggrExceptionInStep")
+    def test_aggr_exception_in_step(self):
+        cur = self.con.cursor()
+        with self.assertRaises(sqlite.OperationalError) as cm:
+            cur.execute("select excStep(t) from test")
+            val = cur.fetchone()[0]
+        self.assertEqual(str(cm.exception), "user-defined aggregate's 'step' method raised error")
+
+    @with_tracebacks(ZeroDivisionError, name="AggrExceptionInFinalize")
+    def test_aggr_exception_in_finalize(self):
+        cur = self.con.cursor()
+        with self.assertRaises(sqlite.OperationalError) as cm:
+            cur.execute("select excFinalize(t) from test")
+            val = cur.fetchone()[0]
+        self.assertEqual(str(cm.exception), "user-defined aggregate's 'finalize' method raised error")
+
+    def test_aggr_check_param_str(self):
+        cur = self.con.cursor()
+        cur.execute("select checkTypes('str', ?, ?)", ("foo", str()))
+        val = cur.fetchone()[0]
+        self.assertEqual(val, 2)
+
+    def test_aggr_check_param_int(self):
+        cur = self.con.cursor()
+        cur.execute("select checkType('int', ?)", (42,))
+        val = cur.fetchone()[0]
+        self.assertEqual(val, 1)
+
+    def test_aggr_check_params_int(self):
+        cur = self.con.cursor()
+        cur.execute("select checkTypes('int', ?, ?)", (42, 24))
+        val = cur.fetchone()[0]
+        self.assertEqual(val, 2)
+
+    def test_aggr_check_param_float(self):
+        cur = self.con.cursor()
+        cur.execute("select checkType('float', ?)", (3.14,))
+        val = cur.fetchone()[0]
+        self.assertEqual(val, 1)
+
+    def test_aggr_check_param_none(self):
+        cur = self.con.cursor()
+        cur.execute("select checkType('None', ?)", (None,))
+        val = cur.fetchone()[0]
+        self.assertEqual(val, 1)
+
+    def test_aggr_check_param_blob(self):
+        cur = self.con.cursor()
+        cur.execute("select checkType('blob', ?)", (memoryview(b"blob"),))
+        val = cur.fetchone()[0]
+        self.assertEqual(val, 1)
+
+    def test_aggr_check_aggr_sum(self):
+        cur = self.con.cursor()
+        cur.execute("delete from test")
+        cur.executemany("insert into test(i) values (?)", [(10,), (20,), (30,)])
+        cur.execute("select mysum(i) from test")
+        val = cur.fetchone()[0]
+        self.assertEqual(val, 60)
+
+    def test_aggr_no_match(self):
+        cur = self.con.execute("select mysum(i) from (select 1 as i) where i == 0")
+        val = cur.fetchone()[0]
+        self.assertIsNone(val)
+
+    def test_aggr_text(self):
+        cur = self.con.cursor()
+        for txt in ["foo", "1\x002"]:
+            with self.subTest(txt=txt):
+                cur.execute("select aggtxt(?) from test", (txt,))
+                val = cur.fetchone()[0]
+                self.assertEqual(val, txt)
+
+    def test_agg_keyword_args(self):
+        regex = (
+            r"Passing keyword arguments 'name', 'n_arg' and 'aggregate_class' to "
+            r"_sqlite3.Connection.create_aggregate\(\) is deprecated. "
+            r"Parameters 'name', 'n_arg' and 'aggregate_class' will become "
+            r"positional-only in Python 3.15."
+        )
+
+        with self.assertWarnsRegex(DeprecationWarning, regex) as cm:
+            self.con.create_aggregate("test", 1, aggregate_class=AggrText)
+        self.assertEqual(cm.filename, __file__)
+
+        with self.assertWarnsRegex(DeprecationWarning, regex) as cm:
+            self.con.create_aggregate("test", n_arg=1, aggregate_class=AggrText)
+        self.assertEqual(cm.filename, __file__)
+
+        with self.assertWarnsRegex(DeprecationWarning, regex) as cm:
+            self.con.create_aggregate(name="test", n_arg=0,
+                                      aggregate_class=AggrText)
+        self.assertEqual(cm.filename, __file__)
+
+
+class AuthorizerTests(unittest.TestCase):
+    @staticmethod
+    def authorizer_cb(action, arg1, arg2, dbname, source):
+        if action != sqlite.SQLITE_SELECT:
+            return sqlite.SQLITE_DENY
+        if arg2 == 'c2' or arg1 == 't2':
+            return sqlite.SQLITE_DENY
+        return sqlite.SQLITE_OK
+
+    def setUp(self):
+        self.con = sqlite.connect(":memory:")
+        self.con.executescript("""
+            create table t1 (c1, c2);
+            create table t2 (c1, c2);
+            insert into t1 (c1, c2) values (1, 2);
+            insert into t2 (c1, c2) values (4, 5);
+            """)
+
+        # For our security test:
+        self.con.execute("select c2 from t2")
+
+        self.con.set_authorizer(self.authorizer_cb)
+
+    def tearDown(self):
+        self.con.close()
+
+    def test_table_access(self):
+        with self.assertRaises(sqlite.DatabaseError) as cm:
+            self.con.execute("select * from t2")
+        self.assertIn('prohibited', str(cm.exception))
+
+    def test_column_access(self):
+        with self.assertRaises(sqlite.DatabaseError) as cm:
+            self.con.execute("select c2 from t1")
+        self.assertIn('prohibited', str(cm.exception))
+
+    def test_clear_authorizer(self):
+        self.con.set_authorizer(None)
+        self.con.execute("select * from t2")
+        self.con.execute("select c2 from t1")
+
+    def test_authorizer_keyword_args(self):
+        regex = (
+            r"Passing keyword argument 'authorizer_callback' to "
+            r"_sqlite3.Connection.set_authorizer\(\) is deprecated. "
+            r"Parameter 'authorizer_callback' will become positional-only in "
+            r"Python 3.15."
+        )
+
+        with self.assertWarnsRegex(DeprecationWarning, regex) as cm:
+            self.con.set_authorizer(authorizer_callback=lambda: None)
+        self.assertEqual(cm.filename, __file__)
+
+
+class AuthorizerRaiseExceptionTests(AuthorizerTests):
+    @staticmethod
+    def authorizer_cb(action, arg1, arg2, dbname, source):
+        if action != sqlite.SQLITE_SELECT:
+            raise ValueError
+        if arg2 == 'c2' or arg1 == 't2':
+            raise ValueError
+        return sqlite.SQLITE_OK
+
+    @with_tracebacks(ValueError, name="authorizer_cb")
+    def test_table_access(self):
+        super().test_table_access()
+
+    @with_tracebacks(ValueError, name="authorizer_cb")
+    def test_column_access(self):
+        super().test_table_access()
+
+class AuthorizerIllegalTypeTests(AuthorizerTests):
+    @staticmethod
+    def authorizer_cb(action, arg1, arg2, dbname, source):
+        if action != sqlite.SQLITE_SELECT:
+            return 0.0
+        if arg2 == 'c2' or arg1 == 't2':
+            return 0.0
+        return sqlite.SQLITE_OK
+
+class AuthorizerLargeIntegerTests(AuthorizerTests):
+    @staticmethod
+    def authorizer_cb(action, arg1, arg2, dbname, source):
+        if action != sqlite.SQLITE_SELECT:
+            return 2**32
+        if arg2 == 'c2' or arg1 == 't2':
+            return 2**32
+        return sqlite.SQLITE_OK
+
+
+if __name__ == "__main__":
+    unittest.main()