-
-
Notifications
You must be signed in to change notification settings - Fork 3.2k
Expand file tree
/
Copy pathcheck-type-checks.test
More file actions
117 lines (108 loc) · 4.1 KB
/
check-type-checks.test
File metadata and controls
117 lines (108 loc) · 4.1 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
-- Conditional type checks.
[case testSimpleIsinstance]
x: object
n: int
s: str
if int():
n = x # E: Incompatible types in assignment (expression has type "object", variable has type "int")
if isinstance(x, int):
n = x
s = x # E: Incompatible types in assignment (expression has type "int", variable has type "str")
if int():
n = x # E: Incompatible types in assignment (expression has type "object", variable has type "int")
[builtins fixtures/isinstance.pyi]
[case testSimpleIsinstance2]
import typing
def f(x: object, n: int, s: str) -> None:
if int():
n = x # E: Incompatible types in assignment (expression has type "object", variable has type "int")
if isinstance(x, int):
n = x
s = x # E: Incompatible types in assignment (expression has type "int", variable has type "str")
n = x # E: Incompatible types in assignment (expression has type "object", variable has type "int")
[builtins fixtures/isinstance.pyi]
[out]
[case testSimpleIsinstance3]
class A:
x: object
n: int
s: str
if int():
n = x # E: Incompatible types in assignment (expression has type "object", variable has type "int")
if isinstance(x, int):
n = x
s = x # E: Incompatible types in assignment (expression has type "int", variable has type "str")
else:
n = x # E: Incompatible types in assignment (expression has type "object", variable has type "int")
[builtins fixtures/isinstance.pyi]
[out]
[case testMultipleIsinstanceTests]
import typing
class A: pass
class B(A): pass
def f(x: object, a: A, b: B, c: int) -> None:
if isinstance(x, A):
if isinstance(x, B):
b = x
x = a
a = x
c = x # E: Incompatible types in assignment (expression has type "A", variable has type "int")
[builtins fixtures/isinstance.pyi]
[out]
[case testMultipleIsinstanceTests2]
import typing
class A: pass
class B(A): pass
def f(x: object, y: object, n: int, s: str) -> None:
if isinstance(x, int):
if isinstance(y, str):
n = x
s = y
s = x # E: Incompatible types in assignment (expression has type "int", variable has type "str")
n = y # E: Incompatible types in assignment (expression has type "str", variable has type "int")
s = y # E: Incompatible types in assignment (expression has type "object", variable has type "str")
n = y # E: Incompatible types in assignment (expression has type "object", variable has type "int")
n = x
[builtins fixtures/isinstance.pyi]
[out]
[case testIsinstanceAndElif]
import typing
def f(x: object, n: int, s: str) -> None:
if int():
n = x # E: Incompatible types in assignment (expression has type "object", variable has type "int")
if isinstance(x, int):
n = x
s = x # E: Incompatible types in assignment (expression has type "int", variable has type "str")
elif isinstance(x, str):
s = x
n = x # E: Incompatible types in assignment (expression has type "str", variable has type "int")
else:
n = x # E: Incompatible types in assignment (expression has type "object", variable has type "int")
s = x # E: Incompatible types in assignment (expression has type "object", variable has type "str")
n = x # E: Incompatible types in assignment (expression has type "object", variable has type "int")
[builtins fixtures/isinstance.pyi]
[out]
[case testIsinstanceAndAnyType]
from typing import Any
def f(x: Any, n: int, s: str) -> None:
if int():
s = x
if isinstance(x, int):
n = x
s = x # E: Incompatible types in assignment (expression has type "int", variable has type "str")
s = x
[builtins fixtures/isinstance.pyi]
[out]
[case testIsinstanceAndGenericType]
from typing import TypeVar, Generic
T = TypeVar('T')
class C(Generic[T]):
def f(self, x: T) -> None: pass
def f(x: object) -> None:
if isinstance(x, C):
x.f(1)
x.f('')
x.g() # E: "C[Any]" has no attribute "g"
x.g() # E: "object" has no attribute "g"
[builtins fixtures/isinstance.pyi]
[out]