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Alex d77480768d [red-knot] Port type inference tests to new test framework (#13719 )

## Summary

Porting infer tests to new markdown tests framework.

Link to the corresponding issue: #13696

---------

Co-authored-by: Carl Meyer <carl@astral.sh>

2024-10-15 11:23:46 -07:00

1.4 KiB

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Unions in calls

Union of return types

if flag:
    def f() -> int:
        return 1
else:
    def f() -> str:
        return 'foo'

x = f()
reveal_type(x)  # revealed: int | str

Calling with an unknown union

from nonexistent import f # error: [unresolved-import] "Cannot resolve import `nonexistent`"

if flag:
    def f() -> int:
        return 1

x = f()
reveal_type(x)  # revealed: Unknown | int

Non-callable elements in a union

Calling a union with a non-callable element should emit a diagnostic.

if flag:
    f = 1
else:
    def f() -> int:
        return 1

x = f()  # error: "Object of type `Literal[1] | Literal[f]` is not callable (due to union element `Literal[1]`)"
reveal_type(x)  # revealed: Unknown | int

Multiple non-callable elements in a union

Calling a union with multiple non-callable elements should mention all of them in the diagnostic.

if flag:
    f = 1
elif flag2:
    f = 'foo'
else:
    def f() -> int:
        return 1

x = f()  # error: "Object of type `Literal[1] | Literal["foo"] | Literal[f]` is not callable (due to union elements Literal[1], Literal["foo"])"
reveal_type(x)  # revealed: Unknown | int

All non-callable union elements

Calling a union with no callable elements can emit a simpler diagnostic.

if flag:
    f = 1
else:
    f = 'foo'

x = f()  # error: "Object of type `Literal[1] | Literal["foo"]` is not callable"
reveal_type(x)  # revealed: Unknown

1.4 KiB Raw Blame History