cd $(mktemp -d)

python -m venv venv
. venv/bin/activate

pip install graphql-core==3.2.3 mypy==1.2.0 mypy-extensions==1.0.0 python-dateutil==2.8.2 six==1.16.0 strawberry-graphql==0.176.3 tomli==2.0.1 typing_extensions==4.5.0

cat > file.py <<EOF
import dataclasses
import strawberry

@strawberry.type
class GqlType:
    x: int
    y: int

print(f"{dataclasses.is_dataclass(GqlType)=} {len(dataclasses.fields(GqlType))=} {dataclasses.asdict(GqlType(x=1, y=2))=}")

@strawberry.input
class GqlInput:
    z: int

print(f"{dataclasses.is_dataclass(GqlInput)=} {len(dataclasses.fields(GqlInput))=} {dataclasses.asdict(GqlInput(z=3))=}")
EOF

cat > mypy.ini <<EOF
[mypy]
plugins = strawberry.ext.mypy_plugin
EOF

# runs fine:
python file.py
#> dataclasses.is_dataclass(GqlType)=True len(dataclasses.fields(GqlType))=2 dataclasses.asdict(GqlType(x=1, y=2))={'x': 1, 'y': 2}
#> dataclasses.is_dataclass(GqlInput)=True len(dataclasses.fields(GqlInput))=1 dataclasses.asdict(GqlInput(z=3))={'z': 3}


# BUG: mypy fails:
mypy file.py
#> file.py:9: error: No overload variant of "asdict" matches argument type "GqlType"  [call-overload]
#> file.py:9: error: Argument 1 to "fields" has incompatible type "Type[GqlType]"; expected "Union[DataclassInstance, Type[DataclassInstance]]"  [arg-type]
#> file.py:15: error: No overload variant of "asdict" matches argument type "GqlInput"  [call-overload]
#> file.py:15: error: Argument 1 to "fields" has incompatible type "Type[GqlInput]"; expected "Union[DataclassInstance, Type[DataclassInstance]]"  [arg-type]