test-data/unit/check-semanal-error.test

-- Type checking after an error during semantic analysis
-- -----------------------------------------------------
--
-- This tests both the semantic analyzer (that it does not generate
-- corrupt state on error) and the type checker (that it can deal with
-- whatever state the semantic analyzer sets up).

-- TODO:
--  - invalid type in annotation
--  - invalid function comment type annotation
--  - invalid multiple assignment type annotation
--  - using a type variable as a value
--  - using special names defined in typing as values

[case testMissingModuleImport1]
import m # E
m.foo()
m.x = m.y
1() # E
[out]
main:1: error: Cannot find implementation or library stub for module named "m"
main:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
main:4: error: "int" not callable

[case testMissingModuleImport2]
from m import x # E
x.foo()
x.a = x.b
1() # E
[out]
main:1: error: Cannot find implementation or library stub for module named "m"
main:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
main:4: error: "int" not callable

[case testMissingModuleImport3]
from m import * # E
x # E
1() # E
[out]
main:1: error: Cannot find implementation or library stub for module named "m"
main:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
main:2: error: Name "x" is not defined
main:3: error: "int" not callable

[case testInvalidBaseClass1]
class A(X): # E: Name "X" is not defined
    x = 1
A().foo(1)
A().x = '' # E: Incompatible types in assignment (expression has type "str", variable has type "int")

[case testInvalidBaseClass2]

X = 1
class A(X): # E
    x = 1
A().foo(1)
A().x = '' # E
[out]
main:3: error: Variable "__main__.X" is not valid as a type
main:3: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
main:3: error: Invalid base class "X"
main:6: error: Incompatible types in assignment (expression has type "str", variable has type "int")


[case testInvalidNumberOfTypeArgs]
from typing import TypeVar
T = TypeVar('T')
class C:  # Forgot to add type params here
    def __init__(self, t: T) -> None: pass
c = C(t=3)  # type: C[int]  # E: "C" expects no type arguments, but 1 given

[case testBreakOutsideLoop]
break # E: "break" outside loop

[case testContinueOutsideLoop]
continue # E: "continue" outside loop

[case testYieldOutsideFunction]
yield # E: "yield" outside function
x = 1
yield from x # E: "yield from" outside function
[(yield 1) for _ in x] # E: "yield" inside comprehension or generator expression
{(yield 1) for _ in x} # E: "yield" inside comprehension or generator expression
{i: (yield 1) for i in x} # E: "yield" inside comprehension or generator expression
((yield 1) for _ in x) # E: "yield" inside comprehension or generator expression
y = 1
[(yield from x) for _ in y] # E: "yield from" inside comprehension or generator expression
{(yield from x) for _ in y} # E: "yield from" inside comprehension or generator expression
{i: (yield from x) for i in y} # E: "yield from" inside comprehension or generator expression
((yield from x) for _ in y) # E: "yield from" inside comprehension or generator expression
def f(y):
    [x for x in (yield y)]
    {x for x in (yield y)}
    {x: x for x in (yield y)}
    (x for x in (yield y))
    [x for x in (yield from y)]
    {x for x in (yield from y)}
    {x: x for x in (yield from y)}
    (x for x in (yield from y))
def g(y):
    [(yield 1) for _ in y] # E: "yield" inside comprehension or generator expression
    {(yield 1) for _ in y} # E: "yield" inside comprehension or generator expression
    {i: (yield 1) for i in y} # E: "yield" inside comprehension or generator expression
    ((yield 1) for _ in y) # E: "yield" inside comprehension or generator expression
    lst = 1
    [(yield from lst) for _ in y] # E: "yield from" inside comprehension or generator expression
    {(yield from lst) for _ in y} # E: "yield from" inside comprehension or generator expression
    {i: (yield from lst) for i in y} # E: "yield from" inside comprehension or generator expression
    ((yield from lst) for _ in y) # E: "yield from" inside comprehension or generator expression
def h(y):
    lst = 1
    [x for x in lst if (yield y)] # E: "yield" inside comprehension or generator expression
    {x for x in lst if (yield y)} # E: "yield" inside comprehension or generator expression
    {x: x for x in lst if (yield y)} # E: "yield" inside comprehension or generator expression
    (x for x in lst if (yield y)) # E: "yield" inside comprehension or generator expression
    lst = 1
    [x for x in lst if (yield from y)] # E: "yield from" inside comprehension or generator expression
    {x for x in lst if (yield from y)} # E: "yield from" inside comprehension or generator expression
    {x: x for x in lst if (yield from y)} # E: "yield from" inside comprehension or generator expression
    (x for x in lst if (yield from y)) # E: "yield from" inside comprehension or generator expression

[case testImportFuncDup]

import m
def m() -> None: ...  # E: Name "m" already defined (by an import)

[file m.py]
[out]

[case testIgnoredImportDup]

import m # type: ignore
from m import f # type: ignore
def m() -> None: ...  # E: Name "m" already defined (possibly by an import)
def f() -> None: ...  # E: Name "f" already defined (possibly by an import)

[out]

[case testRuntimeProtoTwoBases]
from typing_extensions import Protocol, runtime_checkable
from typing import TypeVar, Generic

T = TypeVar('T')

@runtime_checkable
class P(Protocol, Generic[T]):
    attr: T

class C:
    attr: int

x: P[int] = C()
[builtins fixtures/tuple.pyi]
[out]