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cpython/Lib/test/test_patma.py

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import array
import collections
import dataclasses
import enum
import inspect
import sys
import unittest
@dataclasses.dataclass
class Point:
x: int
y: int
class TestCompiler(unittest.TestCase):
def test_refleaks(self):
# Hunting for leaks using -R doesn't catch leaks in the compiler itself,
# just the code under test. This test ensures that if there are leaks in
# the pattern compiler, those runs will fail:
with open(__file__) as file:
compile(file.read(), __file__, "exec")
class TestInheritance(unittest.TestCase):
@staticmethod
def check_sequence_then_mapping(x):
match x:
case [*_]:
return "seq"
case {}:
return "map"
@staticmethod
def check_mapping_then_sequence(x):
match x:
case {}:
return "map"
case [*_]:
return "seq"
def test_multiple_inheritance_mapping(self):
class C:
pass
class M1(collections.UserDict, collections.abc.Sequence):
pass
class M2(C, collections.UserDict, collections.abc.Sequence):
pass
class M3(collections.UserDict, C, list):
pass
class M4(dict, collections.abc.Sequence, C):
pass
self.assertEqual(self.check_sequence_then_mapping(M1()), "map")
self.assertEqual(self.check_sequence_then_mapping(M2()), "map")
self.assertEqual(self.check_sequence_then_mapping(M3()), "map")
self.assertEqual(self.check_sequence_then_mapping(M4()), "map")
self.assertEqual(self.check_mapping_then_sequence(M1()), "map")
self.assertEqual(self.check_mapping_then_sequence(M2()), "map")
self.assertEqual(self.check_mapping_then_sequence(M3()), "map")
self.assertEqual(self.check_mapping_then_sequence(M4()), "map")
def test_multiple_inheritance_sequence(self):
class C:
pass
class S1(collections.UserList, collections.abc.Mapping):
pass
class S2(C, collections.UserList, collections.abc.Mapping):
pass
class S3(list, C, collections.abc.Mapping):
pass
class S4(collections.UserList, dict, C):
pass
self.assertEqual(self.check_sequence_then_mapping(S1()), "seq")
self.assertEqual(self.check_sequence_then_mapping(S2()), "seq")
self.assertEqual(self.check_sequence_then_mapping(S3()), "seq")
self.assertEqual(self.check_sequence_then_mapping(S4()), "seq")
self.assertEqual(self.check_mapping_then_sequence(S1()), "seq")
self.assertEqual(self.check_mapping_then_sequence(S2()), "seq")
self.assertEqual(self.check_mapping_then_sequence(S3()), "seq")
self.assertEqual(self.check_mapping_then_sequence(S4()), "seq")
def test_late_registration_mapping(self):
class Parent:
pass
class ChildPre(Parent):
pass
class GrandchildPre(ChildPre):
pass
collections.abc.Mapping.register(Parent)
class ChildPost(Parent):
pass
class GrandchildPost(ChildPost):
pass
self.assertEqual(self.check_sequence_then_mapping(Parent()), "map")
self.assertEqual(self.check_sequence_then_mapping(ChildPre()), "map")
self.assertEqual(self.check_sequence_then_mapping(GrandchildPre()), "map")
self.assertEqual(self.check_sequence_then_mapping(ChildPost()), "map")
self.assertEqual(self.check_sequence_then_mapping(GrandchildPost()), "map")
self.assertEqual(self.check_mapping_then_sequence(Parent()), "map")
self.assertEqual(self.check_mapping_then_sequence(ChildPre()), "map")
self.assertEqual(self.check_mapping_then_sequence(GrandchildPre()), "map")
self.assertEqual(self.check_mapping_then_sequence(ChildPost()), "map")
self.assertEqual(self.check_mapping_then_sequence(GrandchildPost()), "map")
def test_late_registration_sequence(self):
class Parent:
pass
class ChildPre(Parent):
pass
class GrandchildPre(ChildPre):
pass
collections.abc.Sequence.register(Parent)
class ChildPost(Parent):
pass
class GrandchildPost(ChildPost):
pass
self.assertEqual(self.check_sequence_then_mapping(Parent()), "seq")
self.assertEqual(self.check_sequence_then_mapping(ChildPre()), "seq")
self.assertEqual(self.check_sequence_then_mapping(GrandchildPre()), "seq")
self.assertEqual(self.check_sequence_then_mapping(ChildPost()), "seq")
self.assertEqual(self.check_sequence_then_mapping(GrandchildPost()), "seq")
self.assertEqual(self.check_mapping_then_sequence(Parent()), "seq")
self.assertEqual(self.check_mapping_then_sequence(ChildPre()), "seq")
self.assertEqual(self.check_mapping_then_sequence(GrandchildPre()), "seq")
self.assertEqual(self.check_mapping_then_sequence(ChildPost()), "seq")
self.assertEqual(self.check_mapping_then_sequence(GrandchildPost()), "seq")
class TestPatma(unittest.TestCase):
def test_patma_000(self):
match 0:
case 0:
x = True
self.assertIs(x, True)
def test_patma_001(self):
match 0:
case 0 if False:
x = False
case 0 if True:
x = True
self.assertIs(x, True)
def test_patma_002(self):
match 0:
case 0:
x = True
case 0:
x = False
self.assertIs(x, True)
def test_patma_003(self):
x = False
match 0:
case 0 | 1 | 2 | 3:
x = True
self.assertIs(x, True)
def test_patma_004(self):
x = False
match 1:
case 0 | 1 | 2 | 3:
x = True
self.assertIs(x, True)
def test_patma_005(self):
x = False
match 2:
case 0 | 1 | 2 | 3:
x = True
self.assertIs(x, True)
def test_patma_006(self):
x = False
match 3:
case 0 | 1 | 2 | 3:
x = True
self.assertIs(x, True)
def test_patma_007(self):
x = False
match 4:
case 0 | 1 | 2 | 3:
x = True
self.assertIs(x, False)
def test_patma_008(self):
x = 0
class A:
y = 1
match x:
case A.y as z:
pass
self.assertEqual(x, 0)
self.assertEqual(A.y, 1)
def test_patma_009(self):
class A:
B = 0
match 0:
case x if x:
z = 0
case _ as y if y == x and y:
z = 1
case A.B:
z = 2
self.assertEqual(A.B, 0)
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertEqual(z, 2)
def test_patma_010(self):
match ():
case []:
x = 0
self.assertEqual(x, 0)
def test_patma_011(self):
match (0, 1, 2):
case [*x]:
y = 0
self.assertEqual(x, [0, 1, 2])
self.assertEqual(y, 0)
def test_patma_012(self):
match (0, 1, 2):
case [0, *x]:
y = 0
self.assertEqual(x, [1, 2])
self.assertEqual(y, 0)
def test_patma_013(self):
match (0, 1, 2):
case [0, 1, *x,]:
y = 0
self.assertEqual(x, [2])
self.assertEqual(y, 0)
def test_patma_014(self):
match (0, 1, 2):
case [0, 1, 2, *x]:
y = 0
self.assertEqual(x, [])
self.assertEqual(y, 0)
def test_patma_015(self):
match (0, 1, 2):
case [*x, 2,]:
y = 0
self.assertEqual(x, [0, 1])
self.assertEqual(y, 0)
def test_patma_016(self):
match (0, 1, 2):
case [*x, 1, 2]:
y = 0
self.assertEqual(x, [0])
self.assertEqual(y, 0)
def test_patma_017(self):
match (0, 1, 2):
case [*x, 0, 1, 2,]:
y = 0
self.assertEqual(x, [])
self.assertEqual(y, 0)
def test_patma_018(self):
match (0, 1, 2):
case [0, *x, 2]:
y = 0
self.assertEqual(x, [1])
self.assertEqual(y, 0)
def test_patma_019(self):
match (0, 1, 2):
case [0, 1, *x, 2,]:
y = 0
self.assertEqual(x, [])
self.assertEqual(y, 0)
def test_patma_020(self):
match (0, 1, 2):
case [0, *x, 1, 2]:
y = 0
self.assertEqual(x, [])
self.assertEqual(y, 0)
def test_patma_021(self):
match (0, 1, 2):
case [*x,]:
y = 0
self.assertEqual(x, [0, 1, 2])
self.assertEqual(y, 0)
def test_patma_022(self):
x = {}
match x:
case {}:
y = 0
self.assertEqual(x, {})
self.assertEqual(y, 0)
def test_patma_023(self):
x = {0: 0}
match x:
case {}:
y = 0
self.assertEqual(x, {0: 0})
self.assertEqual(y, 0)
def test_patma_024(self):
x = {}
y = None
match x:
case {0: 0}:
y = 0
self.assertEqual(x, {})
self.assertIs(y, None)
def test_patma_025(self):
x = {0: 0}
match x:
case {0: (0 | 1 | 2 as z)}:
y = 0
self.assertEqual(x, {0: 0})
self.assertEqual(y, 0)
self.assertEqual(z, 0)
def test_patma_026(self):
x = {0: 1}
match x:
case {0: (0 | 1 | 2 as z)}:
y = 0
self.assertEqual(x, {0: 1})
self.assertEqual(y, 0)
self.assertEqual(z, 1)
def test_patma_027(self):
x = {0: 2}
match x:
case {0: (0 | 1 | 2 as z)}:
y = 0
self.assertEqual(x, {0: 2})
self.assertEqual(y, 0)
self.assertEqual(z, 2)
def test_patma_028(self):
x = {0: 3}
y = None
match x:
case {0: (0 | 1 | 2 as z)}:
y = 0
self.assertEqual(x, {0: 3})
self.assertIs(y, None)
def test_patma_029(self):
x = {}
y = None
match x:
case {0: [1, 2, {}]}:
y = 0
case {0: [1, 2, {}], 1: [[]]}:
y = 1
case []:
y = 2
self.assertEqual(x, {})
self.assertIs(y, None)
def test_patma_030(self):
x = {False: (True, 2.0, {})}
match x:
case {0: [1, 2, {}]}:
y = 0
case {0: [1, 2, {}], 1: [[]]}:
y = 1
case []:
y = 2
self.assertEqual(x, {False: (True, 2.0, {})})
self.assertEqual(y, 0)
def test_patma_031(self):
x = {False: (True, 2.0, {}), 1: [[]], 2: 0}
match x:
case {0: [1, 2, {}]}:
y = 0
case {0: [1, 2, {}], 1: [[]]}:
y = 1
case []:
y = 2
self.assertEqual(x, {False: (True, 2.0, {}), 1: [[]], 2: 0})
self.assertEqual(y, 0)
def test_patma_032(self):
x = {False: (True, 2.0, {}), 1: [[]], 2: 0}
match x:
case {0: [1, 2]}:
y = 0
case {0: [1, 2, {}], 1: [[]]}:
y = 1
case []:
y = 2
self.assertEqual(x, {False: (True, 2.0, {}), 1: [[]], 2: 0})
self.assertEqual(y, 1)
def test_patma_033(self):
x = []
match x:
case {0: [1, 2, {}]}:
y = 0
case {0: [1, 2, {}], 1: [[]]}:
y = 1
case []:
y = 2
self.assertEqual(x, [])
self.assertEqual(y, 2)
def test_patma_034(self):
x = {0: 0}
match x:
case {0: [1, 2, {}]}:
y = 0
case {0: ([1, 2, {}] | False)} | {1: [[]]} | {0: [1, 2, {}]} | [] | "X" | {}:
y = 1
case []:
y = 2
self.assertEqual(x, {0: 0})
self.assertEqual(y, 1)
def test_patma_035(self):
x = {0: 0}
match x:
case {0: [1, 2, {}]}:
y = 0
case {0: [1, 2, {}] | True} | {1: [[]]} | {0: [1, 2, {}]} | [] | "X" | {}:
y = 1
case []:
y = 2
self.assertEqual(x, {0: 0})
self.assertEqual(y, 1)
def test_patma_036(self):
x = 0
match x:
case 0 | 1 | 2:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_037(self):
x = 1
match x:
case 0 | 1 | 2:
y = 0
self.assertEqual(x, 1)
self.assertEqual(y, 0)
def test_patma_038(self):
x = 2
match x:
case 0 | 1 | 2:
y = 0
self.assertEqual(x, 2)
self.assertEqual(y, 0)
def test_patma_039(self):
x = 3
y = None
match x:
case 0 | 1 | 2:
y = 0
self.assertEqual(x, 3)
self.assertIs(y, None)
def test_patma_040(self):
x = 0
match x:
case (0 as z) | (1 as z) | (2 as z) if z == x % 2:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertEqual(z, 0)
def test_patma_041(self):
x = 1
match x:
case (0 as z) | (1 as z) | (2 as z) if z == x % 2:
y = 0
self.assertEqual(x, 1)
self.assertEqual(y, 0)
self.assertEqual(z, 1)
def test_patma_042(self):
x = 2
y = None
match x:
case (0 as z) | (1 as z) | (2 as z) if z == x % 2:
y = 0
self.assertEqual(x, 2)
self.assertIs(y, None)
self.assertEqual(z, 2)
def test_patma_043(self):
x = 3
y = None
match x:
case (0 as z) | (1 as z) | (2 as z) if z == x % 2:
y = 0
self.assertEqual(x, 3)
self.assertIs(y, None)
def test_patma_044(self):
x = ()
match x:
case []:
y = 0
self.assertEqual(x, ())
self.assertEqual(y, 0)
def test_patma_045(self):
x = ()
match x:
case ():
y = 0
self.assertEqual(x, ())
self.assertEqual(y, 0)
def test_patma_046(self):
x = (0,)
match x:
case [0]:
y = 0
self.assertEqual(x, (0,))
self.assertEqual(y, 0)
def test_patma_047(self):
x = ((),)
match x:
case [[]]:
y = 0
self.assertEqual(x, ((),))
self.assertEqual(y, 0)
def test_patma_048(self):
x = [0, 1]
match x:
case [0, 1] | [1, 0]:
y = 0
self.assertEqual(x, [0, 1])
self.assertEqual(y, 0)
def test_patma_049(self):
x = [1, 0]
match x:
case [0, 1] | [1, 0]:
y = 0
self.assertEqual(x, [1, 0])
self.assertEqual(y, 0)
def test_patma_050(self):
x = [0, 0]
y = None
match x:
case [0, 1] | [1, 0]:
y = 0
self.assertEqual(x, [0, 0])
self.assertIs(y, None)
def test_patma_051(self):
w = None
x = [1, 0]
match x:
case [(0 as w)]:
y = 0
case [z] | [1, (0 | 1 as z)] | [z]:
y = 1
self.assertIs(w, None)
self.assertEqual(x, [1, 0])
self.assertEqual(y, 1)
self.assertEqual(z, 0)
def test_patma_052(self):
x = [1, 0]
match x:
case [0]:
y = 0
case [1, 0] if (x := x[:0]):
y = 1
case [1, 0]:
y = 2
self.assertEqual(x, [])
self.assertEqual(y, 2)
def test_patma_053(self):
x = {0}
y = None
match x:
case [0]:
y = 0
self.assertEqual(x, {0})
self.assertIs(y, None)
def test_patma_054(self):
x = set()
y = None
match x:
case []:
y = 0
self.assertEqual(x, set())
self.assertIs(y, None)
def test_patma_055(self):
x = iter([1, 2, 3])
y = None
match x:
case []:
y = 0
self.assertEqual([*x], [1, 2, 3])
self.assertIs(y, None)
def test_patma_056(self):
x = {}
y = None
match x:
case []:
y = 0
self.assertEqual(x, {})
self.assertIs(y, None)
def test_patma_057(self):
x = {0: False, 1: True}
y = None
match x:
case [0, 1]:
y = 0
self.assertEqual(x, {0: False, 1: True})
self.assertIs(y, None)
def test_patma_058(self):
x = 0
match x:
case 0:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_059(self):
x = 0
y = None
match x:
case False:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, None)
def test_patma_060(self):
x = 0
y = None
match x:
case 1:
y = 0
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_061(self):
x = 0
y = None
match x:
case None:
y = 0
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_062(self):
x = 0
match x:
case 0:
y = 0
case 0:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_063(self):
x = 0
y = None
match x:
case 1:
y = 0
case 1:
y = 1
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_064(self):
x = "x"
match x:
case "x":
y = 0
case "y":
y = 1
self.assertEqual(x, "x")
self.assertEqual(y, 0)
def test_patma_065(self):
x = "x"
match x:
case "y":
y = 0
case "x":
y = 1
self.assertEqual(x, "x")
self.assertEqual(y, 1)
def test_patma_066(self):
x = "x"
match x:
case "":
y = 0
case "x":
y = 1
self.assertEqual(x, "x")
self.assertEqual(y, 1)
def test_patma_067(self):
x = b"x"
match x:
case b"y":
y = 0
case b"x":
y = 1
self.assertEqual(x, b"x")
self.assertEqual(y, 1)
def test_patma_068(self):
x = 0
match x:
case 0 if False:
y = 0
case 0:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 1)
def test_patma_069(self):
x = 0
y = None
match x:
case 0 if 0:
y = 0
case 0 if 0:
y = 1
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_070(self):
x = 0
match x:
case 0 if True:
y = 0
case 0 if True:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_071(self):
x = 0
match x:
case 0 if 1:
y = 0
case 0 if 1:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_072(self):
x = 0
match x:
case 0 if True:
y = 0
case 0 if True:
y = 1
y = 2
self.assertEqual(x, 0)
self.assertEqual(y, 2)
def test_patma_073(self):
x = 0
match x:
case 0 if 0:
y = 0
case 0 if 1:
y = 1
y = 2
self.assertEqual(x, 0)
self.assertEqual(y, 2)
def test_patma_074(self):
x = 0
y = None
match x:
case 0 if not (x := 1):
y = 0
case 1:
y = 1
self.assertEqual(x, 1)
self.assertIs(y, None)
def test_patma_075(self):
x = "x"
match x:
case ["x"]:
y = 0
case "x":
y = 1
self.assertEqual(x, "x")
self.assertEqual(y, 1)
def test_patma_076(self):
x = b"x"
match x:
case [b"x"]:
y = 0
case ["x"]:
y = 1
case [120]:
y = 2
case b"x":
y = 4
self.assertEqual(x, b"x")
self.assertEqual(y, 4)
def test_patma_077(self):
x = bytearray(b"x")
y = None
match x:
case [120]:
y = 0
case 120:
y = 1
self.assertEqual(x, b"x")
self.assertIs(y, None)
def test_patma_078(self):
x = ""
match x:
case []:
y = 0
case [""]:
y = 1
case "":
y = 2
self.assertEqual(x, "")
self.assertEqual(y, 2)
def test_patma_079(self):
x = "xxx"
match x:
case ["x", "x", "x"]:
y = 0
case ["xxx"]:
y = 1
case "xxx":
y = 2
self.assertEqual(x, "xxx")
self.assertEqual(y, 2)
def test_patma_080(self):
x = b"xxx"
match x:
case [120, 120, 120]:
y = 0
case [b"xxx"]:
y = 1
case b"xxx":
y = 2
self.assertEqual(x, b"xxx")
self.assertEqual(y, 2)
def test_patma_081(self):
x = 0
match x:
case 0 if not (x := 1):
y = 0
case (0 as z):
y = 1
self.assertEqual(x, 1)
self.assertEqual(y, 1)
self.assertEqual(z, 0)
def test_patma_082(self):
x = 0
match x:
case (1 as z) if not (x := 1):
y = 0
case 0:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 1)
def test_patma_083(self):
x = 0
match x:
case (0 as z):
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertEqual(z, 0)
def test_patma_084(self):
x = 0
y = None
match x:
case (1 as z):
y = 0
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_085(self):
x = 0
y = None
match x:
case (0 as z) if (w := 0):
y = 0
self.assertEqual(w, 0)
self.assertEqual(x, 0)
self.assertIs(y, None)
self.assertEqual(z, 0)
def test_patma_086(self):
x = 0
match x:
case ((0 as w) as z):
y = 0
self.assertEqual(w, 0)
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertEqual(z, 0)
def test_patma_087(self):
x = 0
match x:
case (0 | 1) | 2:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_088(self):
x = 1
match x:
case (0 | 1) | 2:
y = 0
self.assertEqual(x, 1)
self.assertEqual(y, 0)
def test_patma_089(self):
x = 2
match x:
case (0 | 1) | 2:
y = 0
self.assertEqual(x, 2)
self.assertEqual(y, 0)
def test_patma_090(self):
x = 3
y = None
match x:
case (0 | 1) | 2:
y = 0
self.assertEqual(x, 3)
self.assertIs(y, None)
def test_patma_091(self):
x = 0
match x:
case 0 | (1 | 2):
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_092(self):
x = 1
match x:
case 0 | (1 | 2):
y = 0
self.assertEqual(x, 1)
self.assertEqual(y, 0)
def test_patma_093(self):
x = 2
match x:
case 0 | (1 | 2):
y = 0
self.assertEqual(x, 2)
self.assertEqual(y, 0)
def test_patma_094(self):
x = 3
y = None
match x:
case 0 | (1 | 2):
y = 0
self.assertEqual(x, 3)
self.assertIs(y, None)
def test_patma_095(self):
x = 0
match x:
case -0:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_096(self):
x = 0
match x:
case -0.0:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_097(self):
x = 0
match x:
case -0j:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_098(self):
x = 0
match x:
case -0.0j:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_099(self):
x = -1
match x:
case -1:
y = 0
self.assertEqual(x, -1)
self.assertEqual(y, 0)
def test_patma_100(self):
x = -1.5
match x:
case -1.5:
y = 0
self.assertEqual(x, -1.5)
self.assertEqual(y, 0)
def test_patma_101(self):
x = -1j
match x:
case -1j:
y = 0
self.assertEqual(x, -1j)
self.assertEqual(y, 0)
def test_patma_102(self):
x = -1.5j
match x:
case -1.5j:
y = 0
self.assertEqual(x, -1.5j)
self.assertEqual(y, 0)
def test_patma_103(self):
x = 0
match x:
case 0 + 0j:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_104(self):
x = 0
match x:
case 0 - 0j:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_105(self):
x = 0
match x:
case -0 + 0j:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_106(self):
x = 0
match x:
case -0 - 0j:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_107(self):
x = 0.25 + 1.75j
match x:
case 0.25 + 1.75j:
y = 0
self.assertEqual(x, 0.25 + 1.75j)
self.assertEqual(y, 0)
def test_patma_108(self):
x = 0.25 - 1.75j
match x:
case 0.25 - 1.75j:
y = 0
self.assertEqual(x, 0.25 - 1.75j)
self.assertEqual(y, 0)
def test_patma_109(self):
x = -0.25 + 1.75j
match x:
case -0.25 + 1.75j:
y = 0
self.assertEqual(x, -0.25 + 1.75j)
self.assertEqual(y, 0)
def test_patma_110(self):
x = -0.25 - 1.75j
match x:
case -0.25 - 1.75j:
y = 0
self.assertEqual(x, -0.25 - 1.75j)
self.assertEqual(y, 0)
def test_patma_111(self):
class A:
B = 0
x = 0
match x:
case A.B:
y = 0
self.assertEqual(A.B, 0)
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_112(self):
class A:
class B:
C = 0
x = 0
match x:
case A.B.C:
y = 0
self.assertEqual(A.B.C, 0)
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_113(self):
class A:
class B:
C = 0
D = 1
x = 1
match x:
case A.B.C:
y = 0
case A.B.D:
y = 1
self.assertEqual(A.B.C, 0)
self.assertEqual(A.B.D, 1)
self.assertEqual(x, 1)
self.assertEqual(y, 1)
def test_patma_114(self):
class A:
class B:
class C:
D = 0
x = 0
match x:
case A.B.C.D:
y = 0
self.assertEqual(A.B.C.D, 0)
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_115(self):
class A:
class B:
class C:
D = 0
E = 1
x = 1
match x:
case A.B.C.D:
y = 0
case A.B.C.E:
y = 1
self.assertEqual(A.B.C.D, 0)
self.assertEqual(A.B.C.E, 1)
self.assertEqual(x, 1)
self.assertEqual(y, 1)
def test_patma_116(self):
match = case = 0
match match:
case case:
x = 0
self.assertEqual(match, 0)
self.assertEqual(case, 0)
self.assertEqual(x, 0)
def test_patma_117(self):
match = case = 0
match case:
case match:
x = 0
self.assertEqual(match, 0)
self.assertEqual(case, 0)
self.assertEqual(x, 0)
def test_patma_118(self):
x = []
match x:
case [*_, _]:
y = 0
case []:
y = 1
self.assertEqual(x, [])
self.assertEqual(y, 1)
def test_patma_119(self):
x = collections.defaultdict(int)
match x:
case {0: 0}:
y = 0
case {}:
y = 1
self.assertEqual(x, {})
self.assertEqual(y, 1)
def test_patma_120(self):
x = collections.defaultdict(int)
match x:
case {0: 0}:
y = 0
case {**z}:
y = 1
self.assertEqual(x, {})
self.assertEqual(y, 1)
self.assertEqual(z, {})
def test_patma_121(self):
match ():
case ():
x = 0
self.assertEqual(x, 0)
def test_patma_122(self):
match (0, 1, 2):
case (*x,):
y = 0
self.assertEqual(x, [0, 1, 2])
self.assertEqual(y, 0)
def test_patma_123(self):
match (0, 1, 2):
case 0, *x:
y = 0
self.assertEqual(x, [1, 2])
self.assertEqual(y, 0)
def test_patma_124(self):
match (0, 1, 2):
case (0, 1, *x,):
y = 0
self.assertEqual(x, [2])
self.assertEqual(y, 0)
def test_patma_125(self):
match (0, 1, 2):
case 0, 1, 2, *x:
y = 0
self.assertEqual(x, [])
self.assertEqual(y, 0)
def test_patma_126(self):
match (0, 1, 2):
case *x, 2,:
y = 0
self.assertEqual(x, [0, 1])
self.assertEqual(y, 0)
def test_patma_127(self):
match (0, 1, 2):
case (*x, 1, 2):
y = 0
self.assertEqual(x, [0])
self.assertEqual(y, 0)
def test_patma_128(self):
match (0, 1, 2):
case *x, 0, 1, 2,:
y = 0
self.assertEqual(x, [])
self.assertEqual(y, 0)
def test_patma_129(self):
match (0, 1, 2):
case (0, *x, 2):
y = 0
self.assertEqual(x, [1])
self.assertEqual(y, 0)
def test_patma_130(self):
match (0, 1, 2):
case 0, 1, *x, 2,:
y = 0
self.assertEqual(x, [])
self.assertEqual(y, 0)
def test_patma_131(self):
match (0, 1, 2):
case (0, *x, 1, 2):
y = 0
self.assertEqual(x, [])
self.assertEqual(y, 0)
def test_patma_132(self):
match (0, 1, 2):
case *x,:
y = 0
self.assertEqual(x, [0, 1, 2])
self.assertEqual(y, 0)
def test_patma_133(self):
x = collections.defaultdict(int, {0: 1})
match x:
case {1: 0}:
y = 0
case {0: 0}:
y = 1
case {}:
y = 2
self.assertEqual(x, {0: 1})
self.assertEqual(y, 2)
def test_patma_134(self):
x = collections.defaultdict(int, {0: 1})
match x:
case {1: 0}:
y = 0
case {0: 0}:
y = 1
case {**z}:
y = 2
self.assertEqual(x, {0: 1})
self.assertEqual(y, 2)
self.assertEqual(z, {0: 1})
def test_patma_135(self):
x = collections.defaultdict(int, {0: 1})
match x:
case {1: 0}:
y = 0
case {0: 0}:
y = 1
case {0: _, **z}:
y = 2
self.assertEqual(x, {0: 1})
self.assertEqual(y, 2)
self.assertEqual(z, {})
def test_patma_136(self):
x = {0: 1}
match x:
case {1: 0}:
y = 0
case {0: 0}:
y = 0
case {}:
y = 1
self.assertEqual(x, {0: 1})
self.assertEqual(y, 1)
def test_patma_137(self):
x = {0: 1}
match x:
case {1: 0}:
y = 0
case {0: 0}:
y = 0
case {**z}:
y = 1
self.assertEqual(x, {0: 1})
self.assertEqual(y, 1)
self.assertEqual(z, {0: 1})
def test_patma_138(self):
x = {0: 1}
match x:
case {1: 0}:
y = 0
case {0: 0}:
y = 0
case {0: _, **z}:
y = 1
self.assertEqual(x, {0: 1})
self.assertEqual(y, 1)
self.assertEqual(z, {})
def test_patma_139(self):
x = False
match x:
case bool(z):
y = 0
self.assertIs(x, False)
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_140(self):
x = True
match x:
case bool(z):
y = 0
self.assertIs(x, True)
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_141(self):
x = bytearray()
match x:
case bytearray(z):
y = 0
self.assertEqual(x, bytearray())
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_142(self):
x = b""
match x:
case bytes(z):
y = 0
self.assertEqual(x, b"")
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_143(self):
x = {}
match x:
case dict(z):
y = 0
self.assertEqual(x, {})
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_144(self):
x = 0.0
match x:
case float(z):
y = 0
self.assertEqual(x, 0.0)
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_145(self):
x = frozenset()
match x:
case frozenset(z):
y = 0
self.assertEqual(x, frozenset())
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_146(self):
x = 0
match x:
case int(z):
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_147(self):
x = []
match x:
case list(z):
y = 0
self.assertEqual(x, [])
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_148(self):
x = set()
match x:
case set(z):
y = 0
self.assertEqual(x, set())
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_149(self):
x = ""
match x:
case str(z):
y = 0
self.assertEqual(x, "")
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_150(self):
x = ()
match x:
case tuple(z):
y = 0
self.assertEqual(x, ())
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_151(self):
x = 0
match x,:
case y,:
z = 0
self.assertEqual(x, 0)
self.assertIs(y, x)
self.assertIs(z, 0)
def test_patma_152(self):
w = 0
x = 0
match w, x:
case y, z:
v = 0
self.assertEqual(w, 0)
self.assertEqual(x, 0)
self.assertIs(y, w)
self.assertIs(z, x)
self.assertEqual(v, 0)
def test_patma_153(self):
x = 0
match w := x,:
case y as v,:
z = 0
self.assertEqual(x, 0)
self.assertIs(y, x)
self.assertEqual(z, 0)
self.assertIs(w, x)
self.assertIs(v, y)
def test_patma_154(self):
x = 0
y = None
match x:
case 0 if x:
y = 0
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_155(self):
x = 0
y = None
match x:
case 1e1000:
y = 0
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_156(self):
x = 0
match x:
case z:
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_157(self):
x = 0
y = None
match x:
case _ if x:
y = 0
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_158(self):
x = 0
match x:
case -1e1000:
y = 0
case 0:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 1)
def test_patma_159(self):
x = 0
match x:
case 0 if not x:
y = 0
case 1:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_160(self):
x = 0
z = None
match x:
case 0:
y = 0
case z if x:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertIs(z, None)
def test_patma_161(self):
x = 0
match x:
case 0:
y = 0
case _:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_162(self):
x = 0
match x:
case 1 if x:
y = 0
case 0:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 1)
def test_patma_163(self):
x = 0
y = None
match x:
case 1:
y = 0
case 1 if not x:
y = 1
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_164(self):
x = 0
match x:
case 1:
y = 0
case z:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 1)
self.assertIs(z, x)
def test_patma_165(self):
x = 0
match x:
case 1 if x:
y = 0
case _:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 1)
def test_patma_166(self):
x = 0
match x:
case z if not z:
y = 0
case 0 if x:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_167(self):
x = 0
match x:
case z if not z:
y = 0
case 1:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_168(self):
x = 0
match x:
case z if not x:
y = 0
case z:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_169(self):
x = 0
match x:
case z if not z:
y = 0
case _ if x:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertIs(z, x)
def test_patma_170(self):
x = 0
match x:
case _ if not x:
y = 0
case 0:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_171(self):
x = 0
y = None
match x:
case _ if x:
y = 0
case 1:
y = 1
self.assertEqual(x, 0)
self.assertIs(y, None)
def test_patma_172(self):
x = 0
z = None
match x:
case _ if not x:
y = 0
case z if not x:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertIs(z, None)
def test_patma_173(self):
x = 0
match x:
case _ if not x:
y = 0
case _:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_174(self):
def http_error(status):
match status:
case 400:
return "Bad request"
case 401:
return "Unauthorized"
case 403:
return "Forbidden"
case 404:
return "Not found"
case 418:
return "I'm a teapot"
case _:
return "Something else"
self.assertEqual(http_error(400), "Bad request")
self.assertEqual(http_error(401), "Unauthorized")
self.assertEqual(http_error(403), "Forbidden")
self.assertEqual(http_error(404), "Not found")
self.assertEqual(http_error(418), "I'm a teapot")
self.assertEqual(http_error(123), "Something else")
self.assertEqual(http_error("400"), "Something else")
self.assertEqual(http_error(401 | 403 | 404), "Something else") # 407
def test_patma_175(self):
def http_error(status):
match status:
case 400:
return "Bad request"
case 401 | 403 | 404:
return "Not allowed"
case 418:
return "I'm a teapot"
self.assertEqual(http_error(400), "Bad request")
self.assertEqual(http_error(401), "Not allowed")
self.assertEqual(http_error(403), "Not allowed")
self.assertEqual(http_error(404), "Not allowed")
self.assertEqual(http_error(418), "I'm a teapot")
self.assertIs(http_error(123), None)
self.assertIs(http_error("400"), None)
self.assertIs(http_error(401 | 403 | 404), None) # 407
def test_patma_176(self):
def whereis(point):
match point:
case (0, 0):
return "Origin"
case (0, y):
return f"Y={y}"
case (x, 0):
return f"X={x}"
case (x, y):
return f"X={x}, Y={y}"
case _:
return "Not a point"
self.assertEqual(whereis((0, 0)), "Origin")
self.assertEqual(whereis((0, -1.0)), "Y=-1.0")
self.assertEqual(whereis(("X", 0)), "X=X")
self.assertEqual(whereis((None, 1j)), "X=None, Y=1j")
self.assertEqual(whereis(42), "Not a point")
def test_patma_177(self):
def whereis(point):
match point:
case Point(0, 0):
return "Origin"
case Point(0, y):
return f"Y={y}"
case Point(x, 0):
return f"X={x}"
case Point():
return "Somewhere else"
case _:
return "Not a point"
self.assertEqual(whereis(Point(1, 0)), "X=1")
self.assertEqual(whereis(Point(0, 0)), "Origin")
self.assertEqual(whereis(10), "Not a point")
self.assertEqual(whereis(Point(False, False)), "Origin")
self.assertEqual(whereis(Point(0, -1.0)), "Y=-1.0")
self.assertEqual(whereis(Point("X", 0)), "X=X")
self.assertEqual(whereis(Point(None, 1j)), "Somewhere else")
self.assertEqual(whereis(Point), "Not a point")
self.assertEqual(whereis(42), "Not a point")
def test_patma_178(self):
def whereis(point):
match point:
case Point(1, var):
return var
self.assertEqual(whereis(Point(1, 0)), 0)
self.assertIs(whereis(Point(0, 0)), None)
def test_patma_179(self):
def whereis(point):
match point:
case Point(1, y=var):
return var
self.assertEqual(whereis(Point(1, 0)), 0)
self.assertIs(whereis(Point(0, 0)), None)
def test_patma_180(self):
def whereis(point):
match point:
case Point(x=1, y=var):
return var
self.assertEqual(whereis(Point(1, 0)), 0)
self.assertIs(whereis(Point(0, 0)), None)
def test_patma_181(self):
def whereis(point):
match point:
case Point(y=var, x=1):
return var
self.assertEqual(whereis(Point(1, 0)), 0)
self.assertIs(whereis(Point(0, 0)), None)
def test_patma_182(self):
def whereis(points):
match points:
case []:
return "No points"
case [Point(0, 0)]:
return "The origin"
case [Point(x, y)]:
return f"Single point {x}, {y}"
case [Point(0, y1), Point(0, y2)]:
return f"Two on the Y axis at {y1}, {y2}"
case _:
return "Something else"
self.assertEqual(whereis([]), "No points")
self.assertEqual(whereis([Point(0, 0)]), "The origin")
self.assertEqual(whereis([Point(0, 1)]), "Single point 0, 1")
self.assertEqual(whereis([Point(0, 0), Point(0, 0)]), "Two on the Y axis at 0, 0")
self.assertEqual(whereis([Point(0, 1), Point(0, 1)]), "Two on the Y axis at 1, 1")
self.assertEqual(whereis([Point(0, 0), Point(1, 0)]), "Something else")
self.assertEqual(whereis([Point(0, 0), Point(0, 0), Point(0, 0)]), "Something else")
self.assertEqual(whereis([Point(0, 1), Point(0, 1), Point(0, 1)]), "Something else")
def test_patma_183(self):
def whereis(point):
match point:
case Point(x, y) if x == y:
return f"Y=X at {x}"
case Point(x, y):
return "Not on the diagonal"
self.assertEqual(whereis(Point(0, 0)), "Y=X at 0")
self.assertEqual(whereis(Point(0, False)), "Y=X at 0")
self.assertEqual(whereis(Point(False, 0)), "Y=X at False")
self.assertEqual(whereis(Point(-1 - 1j, -1 - 1j)), "Y=X at (-1-1j)")
self.assertEqual(whereis(Point("X", "X")), "Y=X at X")
self.assertEqual(whereis(Point("X", "x")), "Not on the diagonal")
def test_patma_184(self):
class Seq(collections.abc.Sequence):
__getitem__ = None
def __len__(self):
return 0
match Seq():
case []:
y = 0
self.assertEqual(y, 0)
def test_patma_185(self):
class Seq(collections.abc.Sequence):
__getitem__ = None
def __len__(self):
return 42
match Seq():
case [*_]:
y = 0
self.assertEqual(y, 0)
def test_patma_186(self):
class Seq(collections.abc.Sequence):
def __getitem__(self, i):
return i
def __len__(self):
return 42
match Seq():
case [x, *_, y]:
z = 0
self.assertEqual(x, 0)
self.assertEqual(y, 41)
self.assertEqual(z, 0)
def test_patma_187(self):
w = range(10)
match w:
case [x, y, *rest]:
z = 0
self.assertEqual(w, range(10))
self.assertEqual(x, 0)
self.assertEqual(y, 1)
self.assertEqual(z, 0)
self.assertEqual(rest, list(range(2, 10)))
def test_patma_188(self):
w = range(100)
match w:
case (x, y, *rest):
z = 0
self.assertEqual(w, range(100))
self.assertEqual(x, 0)
self.assertEqual(y, 1)
self.assertEqual(z, 0)
self.assertEqual(rest, list(range(2, 100)))
def test_patma_189(self):
w = range(1000)
match w:
case x, y, *rest:
z = 0
self.assertEqual(w, range(1000))
self.assertEqual(x, 0)
self.assertEqual(y, 1)
self.assertEqual(z, 0)
self.assertEqual(rest, list(range(2, 1000)))
def test_patma_190(self):
w = range(1 << 10)
match w:
case [x, y, *_]:
z = 0
self.assertEqual(w, range(1 << 10))
self.assertEqual(x, 0)
self.assertEqual(y, 1)
self.assertEqual(z, 0)
def test_patma_191(self):
w = range(1 << 20)
match w:
case (x, y, *_):
z = 0
self.assertEqual(w, range(1 << 20))
self.assertEqual(x, 0)
self.assertEqual(y, 1)
self.assertEqual(z, 0)
def test_patma_192(self):
w = range(1 << 30)
match w:
case x, y, *_:
z = 0
self.assertEqual(w, range(1 << 30))
self.assertEqual(x, 0)
self.assertEqual(y, 1)
self.assertEqual(z, 0)
def test_patma_193(self):
x = {"bandwidth": 0, "latency": 1}
match x:
case {"bandwidth": b, "latency": l}:
y = 0
self.assertEqual(x, {"bandwidth": 0, "latency": 1})
self.assertIs(b, x["bandwidth"])
self.assertIs(l, x["latency"])
self.assertEqual(y, 0)
def test_patma_194(self):
x = {"bandwidth": 0, "latency": 1, "key": "value"}
match x:
case {"latency": l, "bandwidth": b}:
y = 0
self.assertEqual(x, {"bandwidth": 0, "latency": 1, "key": "value"})
self.assertIs(l, x["latency"])
self.assertIs(b, x["bandwidth"])
self.assertEqual(y, 0)
def test_patma_195(self):
x = {"bandwidth": 0, "latency": 1, "key": "value"}
match x:
case {"bandwidth": b, "latency": l, **rest}:
y = 0
self.assertEqual(x, {"bandwidth": 0, "latency": 1, "key": "value"})
self.assertIs(b, x["bandwidth"])
self.assertIs(l, x["latency"])
self.assertEqual(rest, {"key": "value"})
self.assertEqual(y, 0)
def test_patma_196(self):
x = {"bandwidth": 0, "latency": 1}
match x:
case {"latency": l, "bandwidth": b, **rest}:
y = 0
self.assertEqual(x, {"bandwidth": 0, "latency": 1})
self.assertIs(l, x["latency"])
self.assertIs(b, x["bandwidth"])
self.assertEqual(rest, {})
self.assertEqual(y, 0)
def test_patma_197(self):
w = [Point(-1, 0), Point(1, 2)]
match w:
case (Point(x1, y1), Point(x2, y2) as p2):
z = 0
self.assertEqual(w, [Point(-1, 0), Point(1, 2)])
self.assertIs(x1, w[0].x)
self.assertIs(y1, w[0].y)
self.assertIs(p2, w[1])
self.assertIs(x2, w[1].x)
self.assertIs(y2, w[1].y)
self.assertIs(z, 0)
def test_patma_198(self):
class Color(enum.Enum):
RED = 0
GREEN = 1
BLUE = 2
def f(color):
match color:
case Color.RED:
return "I see red!"
case Color.GREEN:
return "Grass is green"
case Color.BLUE:
return "I'm feeling the blues :("
self.assertEqual(f(Color.RED), "I see red!")
self.assertEqual(f(Color.GREEN), "Grass is green")
self.assertEqual(f(Color.BLUE), "I'm feeling the blues :(")
self.assertIs(f(Color), None)
self.assertIs(f(0), None)
self.assertIs(f(1), None)
self.assertIs(f(2), None)
self.assertIs(f(3), None)
self.assertIs(f(False), None)
self.assertIs(f(True), None)
self.assertIs(f(2+0j), None)
self.assertIs(f(3.0), None)
def test_patma_199(self):
class Color(int, enum.Enum):
RED = 0
GREEN = 1
BLUE = 2
def f(color):
match color:
case Color.RED:
return "I see red!"
case Color.GREEN:
return "Grass is green"
case Color.BLUE:
return "I'm feeling the blues :("
self.assertEqual(f(Color.RED), "I see red!")
self.assertEqual(f(Color.GREEN), "Grass is green")
self.assertEqual(f(Color.BLUE), "I'm feeling the blues :(")
self.assertIs(f(Color), None)
self.assertEqual(f(0), "I see red!")
self.assertEqual(f(1), "Grass is green")
self.assertEqual(f(2), "I'm feeling the blues :(")
self.assertIs(f(3), None)
self.assertEqual(f(False), "I see red!")
self.assertEqual(f(True), "Grass is green")
self.assertEqual(f(2+0j), "I'm feeling the blues :(")
self.assertIs(f(3.0), None)
def test_patma_200(self):
class Class:
__match_args__ = ("a", "b")
c = Class()
c.a = 0
c.b = 1
match c:
case Class(x, y):
z = 0
self.assertIs(x, c.a)
self.assertIs(y, c.b)
self.assertEqual(z, 0)
def test_patma_201(self):
class Class:
__match_args__ = ("a", "b")
c = Class()
c.a = 0
c.b = 1
match c:
case Class(x, b=y):
z = 0
self.assertIs(x, c.a)
self.assertIs(y, c.b)
self.assertEqual(z, 0)
def test_patma_202(self):
class Parent:
__match_args__ = "a", "b"
class Child(Parent):
__match_args__ = ("c", "d")
c = Child()
c.a = 0
c.b = 1
match c:
case Parent(x, y):
z = 0
self.assertIs(x, c.a)
self.assertIs(y, c.b)
self.assertEqual(z, 0)
def test_patma_203(self):
class Parent:
__match_args__ = ("a", "b")
class Child(Parent):
__match_args__ = "c", "d"
c = Child()
c.a = 0
c.b = 1
match c:
case Parent(x, b=y):
z = 0
self.assertIs(x, c.a)
self.assertIs(y, c.b)
self.assertEqual(z, 0)
def test_patma_204(self):
def f(w):
match w:
case 42:
out = locals()
del out["w"]
return out
self.assertEqual(f(42), {})
self.assertIs(f(0), None)
self.assertEqual(f(42.0), {})
self.assertIs(f("42"), None)
def test_patma_205(self):
def f(w):
match w:
case 42.0:
out = locals()
del out["w"]
return out
self.assertEqual(f(42.0), {})
self.assertEqual(f(42), {})
self.assertIs(f(0.0), None)
self.assertIs(f(0), None)
def test_patma_206(self):
def f(w):
match w:
case 1 | 2 | 3:
out = locals()
del out["w"]
return out
self.assertEqual(f(1), {})
self.assertEqual(f(2), {})
self.assertEqual(f(3), {})
self.assertEqual(f(3.0), {})
self.assertIs(f(0), None)
self.assertIs(f(4), None)
self.assertIs(f("1"), None)
def test_patma_207(self):
def f(w):
match w:
case [1, 2] | [3, 4]:
out = locals()
del out["w"]
return out
self.assertEqual(f([1, 2]), {})
self.assertEqual(f([3, 4]), {})
self.assertIs(f(42), None)
self.assertIs(f([2, 3]), None)
self.assertIs(f([1, 2, 3]), None)
self.assertEqual(f([1, 2.0]), {})
def test_patma_208(self):
def f(w):
match w:
case x:
out = locals()
del out["w"]
return out
self.assertEqual(f(42), {"x": 42})
self.assertEqual(f((1, 2)), {"x": (1, 2)})
self.assertEqual(f(None), {"x": None})
def test_patma_209(self):
def f(w):
match w:
case _:
out = locals()
del out["w"]
return out
self.assertEqual(f(42), {})
self.assertEqual(f(None), {})
self.assertEqual(f((1, 2)), {})
def test_patma_210(self):
def f(w):
match w:
case (x, y, z):
out = locals()
del out["w"]
return out
self.assertEqual(f((1, 2, 3)), {"x": 1, "y": 2, "z": 3})
self.assertIs(f((1, 2)), None)
self.assertIs(f((1, 2, 3, 4)), None)
self.assertIs(f(123), None)
self.assertIs(f("abc"), None)
self.assertIs(f(b"abc"), None)
self.assertEqual(f(array.array("b", b"abc")), {'x': 97, 'y': 98, 'z': 99})
self.assertEqual(f(memoryview(b"abc")), {"x": 97, "y": 98, "z": 99})
self.assertIs(f(bytearray(b"abc")), None)
def test_patma_211(self):
def f(w):
match w:
case {"x": x, "y": "y", "z": z}:
out = locals()
del out["w"]
return out
self.assertEqual(f({"x": "x", "y": "y", "z": "z"}), {"x": "x", "z": "z"})
self.assertEqual(f({"x": "x", "y": "y", "z": "z", "a": "a"}), {"x": "x", "z": "z"})
self.assertIs(f(({"x": "x", "y": "yy", "z": "z", "a": "a"})), None)
self.assertIs(f(({"x": "x", "y": "y"})), None)
def test_patma_212(self):
def f(w):
match w:
case Point(int(xx), y="hello"):
out = locals()
del out["w"]
return out
self.assertEqual(f(Point(42, "hello")), {"xx": 42})
def test_patma_213(self):
def f(w):
match w:
case (p, q) as x:
out = locals()
del out["w"]
return out
self.assertEqual(f((1, 2)), {"p": 1, "q": 2, "x": (1, 2)})
self.assertEqual(f([1, 2]), {"p": 1, "q": 2, "x": [1, 2]})
self.assertIs(f(12), None)
self.assertIs(f((1, 2, 3)), None)
def test_patma_214(self):
def f():
match 42:
case 42:
return locals()
self.assertEqual(set(f()), set())
def test_patma_215(self):
def f():
match 1:
case 1 | 2 | 3:
return locals()
self.assertEqual(set(f()), set())
def test_patma_216(self):
def f():
match ...:
case _:
return locals()
self.assertEqual(set(f()), set())
def test_patma_217(self):
def f():
match ...:
case abc:
return locals()
self.assertEqual(set(f()), {"abc"})
def test_patma_218(self):
def f():
match ..., ...:
case a, b:
return locals()
self.assertEqual(set(f()), {"a", "b"})
def test_patma_219(self):
def f():
match {"k": ..., "l": ...}:
case {"k": a, "l": b}:
return locals()
self.assertEqual(set(f()), {"a", "b"})
def test_patma_220(self):
def f():
match Point(..., ...):
case Point(x, y=y):
return locals()
self.assertEqual(set(f()), {"x", "y"})
def test_patma_221(self):
def f():
match ...:
case b as a:
return locals()
self.assertEqual(set(f()), {"a", "b"})
def test_patma_222(self):
def f(x):
match x:
case _:
return 0
self.assertEqual(f(0), 0)
self.assertEqual(f(1), 0)
self.assertEqual(f(2), 0)
self.assertEqual(f(3), 0)
def test_patma_223(self):
def f(x):
match x:
case 0:
return 0
self.assertEqual(f(0), 0)
self.assertIs(f(1), None)
self.assertIs(f(2), None)
self.assertIs(f(3), None)
def test_patma_224(self):
def f(x):
match x:
case 0:
return 0
case _:
return 1
self.assertEqual(f(0), 0)
self.assertEqual(f(1), 1)
self.assertEqual(f(2), 1)
self.assertEqual(f(3), 1)
def test_patma_225(self):
def f(x):
match x:
case 0:
return 0
case 1:
return 1
self.assertEqual(f(0), 0)
self.assertEqual(f(1), 1)
self.assertIs(f(2), None)
self.assertIs(f(3), None)
def test_patma_226(self):
def f(x):
match x:
case 0:
return 0
case 1:
return 1
case _:
return 2
self.assertEqual(f(0), 0)
self.assertEqual(f(1), 1)
self.assertEqual(f(2), 2)
self.assertEqual(f(3), 2)
def test_patma_227(self):
def f(x):
match x:
case 0:
return 0
case 1:
return 1
case 2:
return 2
self.assertEqual(f(0), 0)
self.assertEqual(f(1), 1)
self.assertEqual(f(2), 2)
self.assertIs(f(3), None)
def test_patma_228(self):
match():
case():
x = 0
self.assertEqual(x, 0)
def test_patma_229(self):
x = 0
match(x):
case(x):
y = 0
self.assertEqual(x, 0)
self.assertEqual(y, 0)
def test_patma_230(self):
x = 0
match x:
case False:
y = 0
case 0:
y = 1
self.assertEqual(x, 0)
self.assertEqual(y, 1)
def test_patma_231(self):
x = 1
match x:
case True:
y = 0
case 1:
y = 1
self.assertEqual(x, 1)
self.assertEqual(y, 1)
def test_patma_232(self):
class Eq:
def __eq__(self, other):
return True
x = eq = Eq()
# None
y = None
match x:
case None:
y = 0
self.assertIs(x, eq)
self.assertEqual(y, None)
# True
y = None
match x:
case True:
y = 0
self.assertIs(x, eq)
self.assertEqual(y, None)
# False
y = None
match x:
case False:
y = 0
self.assertIs(x, eq)
self.assertEqual(y, None)
def test_patma_233(self):
x = False
match x:
case False:
y = 0
self.assertIs(x, False)
self.assertEqual(y, 0)
def test_patma_234(self):
x = True
match x:
case True:
y = 0
self.assertIs(x, True)
self.assertEqual(y, 0)
def test_patma_235(self):
x = None
match x:
case None:
y = 0
self.assertIs(x, None)
self.assertEqual(y, 0)
def test_patma_236(self):
x = 0
match x:
case (0 as w) as z:
y = 0
self.assertEqual(w, 0)
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertEqual(z, 0)
def test_patma_237(self):
x = 0
match x:
case (0 as w) as z:
y = 0
self.assertEqual(w, 0)
self.assertEqual(x, 0)
self.assertEqual(y, 0)
self.assertEqual(z, 0)
def test_patma_238(self):
x = ((0, 1), (2, 3))
match x:
case ((a as b, c as d) as e) as w, ((f as g, h) as i) as z:
y = 0
self.assertEqual(a, 0)
self.assertEqual(b, 0)
self.assertEqual(c, 1)
self.assertEqual(d, 1)
self.assertEqual(e, (0, 1))
self.assertEqual(f, 2)
self.assertEqual(g, 2)
self.assertEqual(h, 3)
self.assertEqual(i, (2, 3))
self.assertEqual(w, (0, 1))
self.assertEqual(x, ((0, 1), (2, 3)))
self.assertEqual(y, 0)
self.assertEqual(z, (2, 3))
def test_patma_239(self):
x = collections.UserDict({0: 1, 2: 3})
match x:
case {2: 3}:
y = 0
self.assertEqual(x, {0: 1, 2: 3})
self.assertEqual(y, 0)
def test_patma_240(self):
x = collections.UserDict({0: 1, 2: 3})
match x:
case {2: 3, **z}:
y = 0
self.assertEqual(x, {0: 1, 2: 3})
self.assertEqual(y, 0)
self.assertEqual(z, {0: 1})
def test_patma_241(self):
x = [[{0: 0}]]
match x:
case list([({-0-0j: int(real=0+0j, imag=0-0j) | (1) as z},)]):
y = 0
self.assertEqual(x, [[{0: 0}]])
self.assertEqual(y, 0)
self.assertEqual(z, 0)
def test_patma_242(self):
x = range(3)
match x:
case [y, *_, z]:
w = 0
self.assertEqual(w, 0)
self.assertEqual(x, range(3))
self.assertEqual(y, 0)
self.assertEqual(z, 2)
def test_patma_243(self):
x = range(3)
match x:
case [_, *_, y]:
z = 0
self.assertEqual(x, range(3))
self.assertEqual(y, 2)
self.assertEqual(z, 0)
def test_patma_244(self):
x = range(3)
match x:
case [*_, y]:
z = 0
self.assertEqual(x, range(3))
self.assertEqual(y, 2)
self.assertEqual(z, 0)
def test_patma_245(self):
x = {"y": 1}
match x:
case {"y": (0 as y) | (1 as y)}:
z = 0
self.assertEqual(x, {"y": 1})
self.assertEqual(y, 1)
self.assertEqual(z, 0)
def test_patma_246(self):
def f(x):
match x:
case ((a, b, c, d, e, f, g, h, i, 9) |
(h, g, i, a, b, d, e, c, f, 10) |
(g, b, a, c, d, -5, e, h, i, f) |
(-1, d, f, b, g, e, i, a, h, c)):
w = 0
out = locals()
del out["x"]
return out
alts = [
dict(a=0, b=1, c=2, d=3, e=4, f=5, g=6, h=7, i=8, w=0),
dict(h=1, g=2, i=3, a=4, b=5, d=6, e=7, c=8, f=9, w=0),
dict(g=0, b=-1, a=-2, c=-3, d=-4, e=-6, h=-7, i=-8, f=-9, w=0),
dict(d=-2, f=-3, b=-4, g=-5, e=-6, i=-7, a=-8, h=-9, c=-10, w=0),
dict(),
]
self.assertEqual(f(range(10)), alts[0])
self.assertEqual(f(range(1, 11)), alts[1])
self.assertEqual(f(range(0, -10, -1)), alts[2])
self.assertEqual(f(range(-1, -11, -1)), alts[3])
self.assertEqual(f(range(10, 20)), alts[4])
def test_patma_247(self):
def f(x):
match x:
case [y, (a, b, c, d, e, f, g, h, i, 9) |
(h, g, i, a, b, d, e, c, f, 10) |
(g, b, a, c, d, -5, e, h, i, f) |
(-1, d, f, b, g, e, i, a, h, c), z]:
w = 0
out = locals()
del out["x"]
return out
alts = [
dict(a=0, b=1, c=2, d=3, e=4, f=5, g=6, h=7, i=8, w=0, y=False, z=True),
dict(h=1, g=2, i=3, a=4, b=5, d=6, e=7, c=8, f=9, w=0, y=False, z=True),
dict(g=0, b=-1, a=-2, c=-3, d=-4, e=-6, h=-7, i=-8, f=-9, w=0, y=False, z=True),
dict(d=-2, f=-3, b=-4, g=-5, e=-6, i=-7, a=-8, h=-9, c=-10, w=0, y=False, z=True),
dict(),
]
self.assertEqual(f((False, range(10), True)), alts[0])
self.assertEqual(f((False, range(1, 11), True)), alts[1])
self.assertEqual(f((False, range(0, -10, -1), True)), alts[2])
self.assertEqual(f((False, range(-1, -11, -1), True)), alts[3])
self.assertEqual(f((False, range(10, 20), True)), alts[4])
def test_patma_248(self):
class C(dict):
@staticmethod
def get(key, default=None):
return 'bar'
x = C({'foo': 'bar'})
match x:
case {'foo': bar}:
y = bar
self.assertEqual(y, 'bar')
def test_patma_249(self):
class C:
__attr = "eggs" # mangled to _C__attr
_Outer__attr = "bacon"
class Outer:
def f(self, x):
match x:
# looks up __attr, not _C__attr or _Outer__attr
case C(__attr=y):
return y
c = C()
setattr(c, "__attr", "spam") # setattr is needed because we're in a class scope
self.assertEqual(Outer().f(c), "spam")
def test_patma_250(self):
def f(x):
match x:
case {"foo": y} if y >= 0:
return True
case {"foo": y} if y < 0:
return False
self.assertIs(f({"foo": 1}), True)
self.assertIs(f({"foo": -1}), False)
def test_patma_251(self):
def f(v, x):
match v:
case x.attr if x.attr >= 0:
return True
case x.attr if x.attr < 0:
return False
case _:
return None
class X:
def __init__(self, attr):
self.attr = attr
self.assertIs(f(1, X(1)), True)
self.assertIs(f(-1, X(-1)), False)
self.assertIs(f(1, X(-1)), None)
def test_patma_252(self):
# Side effects must be possible in guards:
effects = []
def lt(x, y):
effects.append((x, y))
return x < y
res = None
match {"foo": 1}:
case {"foo": x} if lt(x, 0):
res = 0
case {"foo": x} if lt(x, 1):
res = 1
case {"foo": x} if lt(x, 2):
res = 2
self.assertEqual(res, 2)
self.assertEqual(effects, [(1, 0), (1, 1), (1, 2)])
def test_patma_253(self):
def f(v):
match v:
case [x] | x:
return x
self.assertEqual(f(1), 1)
self.assertEqual(f([1]), 1)
def test_patma_254(self):
def f(v):
match v:
case {"x": x} | x:
return x
self.assertEqual(f(1), 1)
self.assertEqual(f({"x": 1}), 1)
def test_patma_255(self):
x = []
match x:
case [] as z if z.append(None):
y = 0
case [None]:
y = 1
self.assertEqual(x, [None])
self.assertEqual(y, 1)
self.assertIs(z, x)
def test_patma_runtime_checkable_protocol(self):
# Runtime-checkable protocol
from typing import Protocol, runtime_checkable
@runtime_checkable
class P(Protocol):
x: int
y: int
class A:
def __init__(self, x: int, y: int):
self.x = x
self.y = y
class B(A): ...
for cls in (A, B):
with self.subTest(cls=cls.__name__):
inst = cls(1, 2)
w = 0
match inst:
case P() as p:
self.assertIsInstance(p, cls)
self.assertEqual(p.x, 1)
self.assertEqual(p.y, 2)
w = 1
self.assertEqual(w, 1)
q = 0
match inst:
case P(x=x, y=y):
self.assertEqual(x, 1)
self.assertEqual(y, 2)
q = 1
self.assertEqual(q, 1)
def test_patma_generic_protocol(self):
# Runtime-checkable generic protocol
from typing import Generic, TypeVar, Protocol, runtime_checkable
T = TypeVar('T') # not using PEP695 to be able to backport changes
@runtime_checkable
class P(Protocol[T]):
a: T
b: T
class A:
def __init__(self, x: int, y: int):
self.x = x
self.y = y
class G(Generic[T]):
def __init__(self, x: T, y: T):
self.x = x
self.y = y
for cls in (A, G):
with self.subTest(cls=cls.__name__):
inst = cls(1, 2)
w = 0
match inst:
case P():
w = 1
self.assertEqual(w, 0)
def test_patma_protocol_with_match_args(self):
# Runtime-checkable protocol with `__match_args__`
from typing import Protocol, runtime_checkable
# Used to fail before
# https://github.com/python/cpython/issues/110682
@runtime_checkable
class P(Protocol):
__match_args__ = ('x', 'y')
x: int
y: int
class A:
def __init__(self, x: int, y: int):
self.x = x
self.y = y
class B(A): ...
for cls in (A, B):
with self.subTest(cls=cls.__name__):
inst = cls(1, 2)
w = 0
match inst:
case P() as p:
self.assertIsInstance(p, cls)
self.assertEqual(p.x, 1)
self.assertEqual(p.y, 2)
w = 1
self.assertEqual(w, 1)
q = 0
match inst:
case P(x=x, y=y):
self.assertEqual(x, 1)
self.assertEqual(y, 2)
q = 1
self.assertEqual(q, 1)
j = 0
match inst:
case P(x=1, y=2):
j = 1
self.assertEqual(j, 1)
g = 0
match inst:
case P(x, y):
self.assertEqual(x, 1)
self.assertEqual(y, 2)
g = 1
self.assertEqual(g, 1)
h = 0
match inst:
case P(1, 2):
h = 1
self.assertEqual(h, 1)
class TestSyntaxErrors(unittest.TestCase):
def assert_syntax_error(self, code: str):
with self.assertRaises(SyntaxError):
compile(inspect.cleandoc(code), "<test>", "exec")
def test_alternative_patterns_bind_different_names_0(self):
self.assert_syntax_error("""
match ...:
case "a" | a:
pass
""")
def test_alternative_patterns_bind_different_names_1(self):
self.assert_syntax_error("""
match ...:
case [a, [b] | [c] | [d]]:
pass
""")
def test_attribute_name_repeated_in_class_pattern(self):
self.assert_syntax_error("""
match ...:
case Class(a=_, a=_):
pass
""")
def test_imaginary_number_required_in_complex_literal_0(self):
self.assert_syntax_error("""
match ...:
case 0+0:
pass
""")
def test_imaginary_number_required_in_complex_literal_1(self):
self.assert_syntax_error("""
match ...:
case {0+0: _}:
pass
""")
def test_invalid_syntax_0(self):
self.assert_syntax_error("""
match ...:
case {**rest, "key": value}:
pass
""")
def test_invalid_syntax_1(self):
self.assert_syntax_error("""
match ...:
case {"first": first, **rest, "last": last}:
pass
""")
def test_invalid_syntax_2(self):
self.assert_syntax_error("""
match ...:
case {**_}:
pass
""")
def test_invalid_syntax_3(self):
self.assert_syntax_error("""
match ...:
case 42 as _:
pass
""")
def test_len1_tuple_sequence_pattern_comma(self):
# correct syntax would be `case(*x,):`
self.assert_syntax_error("""
match ...:
case (*x):
pass
""")
def test_mapping_pattern_keys_may_only_match_literals_and_attribute_lookups(self):
self.assert_syntax_error("""
match ...:
case {f"": _}:
pass
""")
def test_multiple_assignments_to_name_in_pattern_0(self):
self.assert_syntax_error("""
match ...:
case a, a:
pass
""")
def test_multiple_assignments_to_name_in_pattern_1(self):
self.assert_syntax_error("""
match ...:
case {"k": a, "l": a}:
pass
""")
def test_multiple_assignments_to_name_in_pattern_2(self):
self.assert_syntax_error("""
match ...:
case MyClass(x, x):
pass
""")
def test_multiple_assignments_to_name_in_pattern_3(self):
self.assert_syntax_error("""
match ...:
case MyClass(x=x, y=x):
pass
""")
def test_multiple_assignments_to_name_in_pattern_4(self):
self.assert_syntax_error("""
match ...:
case MyClass(x, y=x):
pass
""")
def test_multiple_assignments_to_name_in_pattern_5(self):
self.assert_syntax_error("""
match ...:
case a as a:
pass
""")
def test_multiple_starred_names_in_sequence_pattern_0(self):
self.assert_syntax_error("""
match ...:
case *a, b, *c, d, *e:
pass
""")
def test_multiple_starred_names_in_sequence_pattern_1(self):
self.assert_syntax_error("""
match ...:
case a, *b, c, *d, e:
pass
""")
def test_name_capture_makes_remaining_patterns_unreachable_0(self):
self.assert_syntax_error("""
match ...:
case a | "a":
pass
""")
def test_name_capture_makes_remaining_patterns_unreachable_1(self):
self.assert_syntax_error("""
match 42:
case x:
pass
case y:
pass
""")
def test_name_capture_makes_remaining_patterns_unreachable_2(self):
self.assert_syntax_error("""
match ...:
case x | [_ as x] if x:
pass
""")
def test_name_capture_makes_remaining_patterns_unreachable_3(self):
self.assert_syntax_error("""
match ...:
case x:
pass
case [x] if x:
pass
""")
def test_name_capture_makes_remaining_patterns_unreachable_4(self):
self.assert_syntax_error("""
match ...:
case x:
pass
case _:
pass
""")
def test_patterns_may_only_match_literals_and_attribute_lookups_0(self):
self.assert_syntax_error("""
match ...:
case f"":
pass
""")
def test_patterns_may_only_match_literals_and_attribute_lookups_1(self):
self.assert_syntax_error("""
match ...:
case f"{x}":
pass
""")
def test_real_number_required_in_complex_literal_0(self):
self.assert_syntax_error("""
match ...:
case 0j+0:
pass
""")
def test_real_number_required_in_complex_literal_1(self):
self.assert_syntax_error("""
match ...:
case 0j+0j:
pass
""")
def test_real_number_required_in_complex_literal_2(self):
self.assert_syntax_error("""
match ...:
case {0j+0: _}:
pass
""")
def test_real_number_required_in_complex_literal_3(self):
self.assert_syntax_error("""
match ...:
case {0j+0j: _}:
pass
""")
def test_real_number_multiple_ops(self):
self.assert_syntax_error("""
match ...:
case 0 + 0j + 0:
pass
""")
def test_real_number_wrong_ops(self):
for op in ["*", "/", "@", "**", "%", "//"]:
with self.subTest(op=op):
self.assert_syntax_error(f"""
match ...:
case 0 {op} 0j:
pass
""")
self.assert_syntax_error(f"""
match ...:
case 0j {op} 0:
pass
""")
self.assert_syntax_error(f"""
match ...:
case -0j {op} 0:
pass
""")
self.assert_syntax_error(f"""
match ...:
case 0j {op} -0:
pass
""")
def test_wildcard_makes_remaining_patterns_unreachable_0(self):
self.assert_syntax_error("""
match ...:
case _ | _:
pass
""")
def test_wildcard_makes_remaining_patterns_unreachable_1(self):
self.assert_syntax_error("""
match ...:
case (_ as x) | [x]:
pass
""")
def test_wildcard_makes_remaining_patterns_unreachable_2(self):
self.assert_syntax_error("""
match ...:
case _ | _ if condition():
pass
""")
def test_wildcard_makes_remaining_patterns_unreachable_3(self):
self.assert_syntax_error("""
match ...:
case _:
pass
case None:
pass
""")
def test_wildcard_makes_remaining_patterns_unreachable_4(self):
self.assert_syntax_error("""
match ...:
case (None | _) | _:
pass
""")
def test_wildcard_makes_remaining_patterns_unreachable_5(self):
self.assert_syntax_error("""
match ...:
case _ | (True | False):
pass
""")
def test_mapping_pattern_duplicate_key(self):
self.assert_syntax_error("""
match ...:
case {"a": _, "a": _}:
pass
""")
def test_mapping_pattern_duplicate_key_edge_case0(self):
self.assert_syntax_error("""
match ...:
case {0: _, False: _}:
pass
""")
def test_mapping_pattern_duplicate_key_edge_case1(self):
self.assert_syntax_error("""
match ...:
case {0: _, 0.0: _}:
pass
""")
def test_mapping_pattern_duplicate_key_edge_case2(self):
self.assert_syntax_error("""
match ...:
case {0: _, -0: _}:
pass
""")
def test_mapping_pattern_duplicate_key_edge_case3(self):
self.assert_syntax_error("""
match ...:
case {0: _, 0j: _}:
pass
""")
class TestTypeErrors(unittest.TestCase):
def test_accepts_positional_subpatterns_0(self):
class Class:
__match_args__ = ()
x = Class()
y = z = None
with self.assertRaises(TypeError):
match x:
case Class(y):
z = 0
self.assertIs(y, None)
self.assertIs(z, None)
def test_accepts_positional_subpatterns_1(self):
x = range(10)
y = None
with self.assertRaises(TypeError):
match x:
case range(10):
y = 0
self.assertEqual(x, range(10))
self.assertIs(y, None)
def test_got_multiple_subpatterns_for_attribute_0(self):
class Class:
__match_args__ = ("a", "a")
a = None
x = Class()
w = y = z = None
with self.assertRaises(TypeError):
match x:
case Class(y, z):
w = 0
self.assertIs(w, None)
self.assertIs(y, None)
self.assertIs(z, None)
def test_got_multiple_subpatterns_for_attribute_1(self):
class Class:
__match_args__ = ("a",)
a = None
x = Class()
w = y = z = None
with self.assertRaises(TypeError):
match x:
case Class(y, a=z):
w = 0
self.assertIs(w, None)
self.assertIs(y, None)
self.assertIs(z, None)
def test_match_args_elements_must_be_strings(self):
class Class:
__match_args__ = (None,)
x = Class()
y = z = None
with self.assertRaises(TypeError):
match x:
case Class(y):
z = 0
self.assertIs(y, None)
self.assertIs(z, None)
def test_match_args_must_be_a_tuple_0(self):
class Class:
__match_args__ = None
x = Class()
y = z = None
with self.assertRaises(TypeError):
match x:
case Class(y):
z = 0
self.assertIs(y, None)
self.assertIs(z, None)
def test_match_args_must_be_a_tuple_1(self):
class Class:
__match_args__ = "XYZ"
x = Class()
y = z = None
with self.assertRaises(TypeError):
match x:
case Class(y):
z = 0
self.assertIs(y, None)
self.assertIs(z, None)
def test_match_args_must_be_a_tuple_2(self):
class Class:
__match_args__ = ["spam", "eggs"]
spam = 0
eggs = 1
x = Class()
w = y = z = None
with self.assertRaises(TypeError):
match x:
case Class(y, z):
w = 0
self.assertIs(w, None)
self.assertIs(y, None)
self.assertIs(z, None)
def test_class_pattern_not_type(self):
w = None
with self.assertRaises(TypeError):
match 1:
case max(0, 1):
w = 0
self.assertIsNone(w)
def test_regular_protocol(self):
from typing import Protocol
class P(Protocol): ...
msg = (
'Instance and class checks can only be used '
'with @runtime_checkable protocols'
)
w = None
with self.assertRaisesRegex(TypeError, msg):
match 1:
case P():
w = 0
self.assertIsNone(w)
def test_positional_patterns_with_regular_protocol(self):
from typing import Protocol
class P(Protocol):
x: int # no `__match_args__`
y: int
class A:
x = 1
y = 2
w = None
with self.assertRaises(TypeError):
match A():
case P(x, y):
w = 0
self.assertIsNone(w)
class TestValueErrors(unittest.TestCase):
def test_mapping_pattern_checks_duplicate_key_1(self):
class Keys:
KEY = "a"
x = {"a": 0, "b": 1}
w = y = z = None
with self.assertRaises(ValueError):
match x:
case {Keys.KEY: y, "a": z}:
w = 0
self.assertIs(w, None)
self.assertIs(y, None)
self.assertIs(z, None)
class TestTracing(unittest.TestCase):
@staticmethod
def _trace(func, *args, **kwargs):
actual_linenos = []
def trace(frame, event, arg):
if event == "line" and frame.f_code.co_name == func.__name__:
assert arg is None
relative_lineno = frame.f_lineno - func.__code__.co_firstlineno
actual_linenos.append(relative_lineno)
return trace
old_trace = sys.gettrace()
sys.settrace(trace)
try:
func(*args, **kwargs)
finally:
sys.settrace(old_trace)
return actual_linenos
def test_default_wildcard(self):
def f(command): # 0
match command.split(): # 1
case ["go", direction] if direction in "nesw": # 2
return f"go {direction}" # 3
case ["go", _]: # 4
return "no go" # 5
case _: # 6
return "default" # 7
self.assertListEqual(self._trace(f, "go n"), [1, 2, 3])
self.assertListEqual(self._trace(f, "go x"), [1, 2, 4, 5])
self.assertListEqual(self._trace(f, "spam"), [1, 2, 4, 6, 7])
def test_default_capture(self):
def f(command): # 0
match command.split(): # 1
case ["go", direction] if direction in "nesw": # 2
return f"go {direction}" # 3
case ["go", _]: # 4
return "no go" # 5
case x: # 6
return x # 7
self.assertListEqual(self._trace(f, "go n"), [1, 2, 3])
self.assertListEqual(self._trace(f, "go x"), [1, 2, 4, 5])
self.assertListEqual(self._trace(f, "spam"), [1, 2, 4, 6, 7])
def test_no_default(self):
def f(command): # 0
match command.split(): # 1
case ["go", direction] if direction in "nesw": # 2
return f"go {direction}" # 3
case ["go", _]: # 4
return "no go" # 5
self.assertListEqual(self._trace(f, "go n"), [1, 2, 3])
self.assertListEqual(self._trace(f, "go x"), [1, 2, 4, 5])
self.assertListEqual(self._trace(f, "spam"), [1, 2, 4])
def test_only_default_wildcard(self):
def f(command): # 0
match command.split(): # 1
case _: # 2
return "default" # 3
self.assertListEqual(self._trace(f, "go n"), [1, 2, 3])
self.assertListEqual(self._trace(f, "go x"), [1, 2, 3])
self.assertListEqual(self._trace(f, "spam"), [1, 2, 3])
def test_only_default_capture(self):
def f(command): # 0
match command.split(): # 1
case x: # 2
return x # 3
self.assertListEqual(self._trace(f, "go n"), [1, 2, 3])
self.assertListEqual(self._trace(f, "go x"), [1, 2, 3])
self.assertListEqual(self._trace(f, "spam"), [1, 2, 3])
def test_unreachable_code(self):
def f(command): # 0
match command: # 1
case 1: # 2
if False: # 3
return 1 # 4
case _: # 5
if False: # 6
return 0 # 7
self.assertListEqual(self._trace(f, 1), [1, 2, 3])
self.assertListEqual(self._trace(f, 0), [1, 2, 5, 6])
def test_parser_deeply_nested_patterns(self):
# Deeply nested patterns can cause exponential backtracking when parsing.
# See gh-93671 for more information.
levels = 100
patterns = [
"A" + "(" * levels + ")" * levels,
"{1:" * levels + "1" + "}" * levels,
"[" * levels + "1" + "]" * levels,
]
for pattern in patterns:
with self.subTest(pattern):
code = inspect.cleandoc("""
match None:
case {}:
pass
""".format(pattern))
compile(code, "<string>", "exec")
if __name__ == "__main__":
"""
# From inside environment using this Python, with pyperf installed:
sudo $(which pyperf) system tune && \
$(which python) -m test.test_patma --rigorous; \
sudo $(which pyperf) system reset
"""
import pyperf
class PerfPatma(TestPatma):
def assertEqual(*_, **__):
pass
def assertIs(*_, **__):
pass
def assertRaises(*_, **__):
assert False, "this test should be a method of a different class!"
def run_perf(self, count):
tests = []
for attr in vars(TestPatma):
if attr.startswith("test_"):
tests.append(getattr(self, attr))
tests *= count
start = pyperf.perf_counter()
for test in tests:
test()
return pyperf.perf_counter() - start
runner = pyperf.Runner()
runner.bench_time_func("patma", PerfPatma().run_perf)
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