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"""Helper classes as mocks for requests objects.
"""
from io import BytesIO
from typing import Any, Callable, Dict, Iterator, List, Optional
_Hook = Callable[["MockResponse"], None]
class FakeStream:
def __init__(self, contents: bytes) -> None:
self._io = BytesIO(contents)
def read(self, size: int, decode_content: Optional[bool] = None) -> bytes:
return self._io.read(size)
def stream(
self, size: int, decode_content: Optional[bool] = None
) -> Iterator[bytes]:
yield self._io.read(size)
def release_conn(self) -> None:
pass
class MockResponse:
request: "MockRequest"
connection: "MockConnection"
url: str
def __init__(self, contents: bytes) -> None:
self.raw = FakeStream(contents)
self.content = contents
self.reason = "OK"
self.status_code = 200
self.headers = {"Content-Length": str(len(contents))}
self.history: List[MockResponse] = []
self.from_cache = False
class MockConnection:
def _send(self, req: "MockRequest", **kwargs: Any) -> MockResponse:
raise NotImplementedError("_send must be overridden for tests")
def send(self, req: "MockRequest", **kwargs: Any) -> MockResponse:
resp = self._send(req, **kwargs)
for cb in req.hooks.get("response", []):
cb(resp)
return resp
class MockRequest:
def __init__(self, url: str) -> None:
self.url = url
self.headers: Dict[str, str] = {}
self.hooks: Dict[str, List[_Hook]] = {}
def register_hook(self, event_name: str, callback: _Hook) -> None:
self.hooks.setdefault(event_name, []).append(callback)
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