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from dataclasses import dataclass
from types import TracebackType
from typing import Union
from wsgiref.util import setup_testing_defaults
@dataclass
class Response:
data: bytes
status: str
headers: list[tuple[str, str]]
exc_info: Union[
None,
tuple[type[BaseException], BaseException, TracebackType],
tuple[None, None, None],
]
def call_app(app, environ={}):
def write(_):
raise AssertionError("write was called, but should not have been")
status = None
headers = None
exc_info = None
def start_response(s, h, e_i=None):
nonlocal status, headers, exc_info
if isinstance(headers, list) and e_i is None:
raise AssertionError("Start response called twice")
status = s
headers = h
exc_info = e_i
return write
setup_testing_defaults(environ)
if "QUERY_STRING" not in environ:
environ["QUERY_STRING"] = ""
resp_iter = app(environ, start_response)
assert isinstance(status, str)
assert isinstance(headers, list)
resp = b"".join(resp_iter)
if hasattr(resp_iter, "close"):
resp_iter.close()
return Response(
resp,
status,
headers,
exc_info,
)
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