41 lines
1.4 KiB
Python
41 lines
1.4 KiB
Python
"""Utilities to help with testing the camera."""
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import tempfile
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from contextlib import contextmanager
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from typing import Optional
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from fastapi.testclient import TestClient
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import labthings_fastapi as lt
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from openflexure_microscope_server.things.camera.picamera import StreamingPiCamera2
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@contextmanager
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def camera_test_client(
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cam: Optional[StreamingPiCamera2] = None, settings_folder: Optional[str] = None
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):
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"""Yield a camera ThingClient on a camera server.
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This is a context manager, not a pytest fixture, as it needs to be created
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multiple times in some tests.
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:param cam: The camera Thing to be used. If not supplied a new one will be created.
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:param settings_folder: The settings folder for the camera, if none is supplied, new
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temporary directory will be used as the settings folder.
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"""
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if cam is None:
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cam = StreamingPiCamera2()
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# Create a temp dir, if the setting folder is set it isn't really needed
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# but doesn't add much overhead.
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with tempfile.TemporaryDirectory() as tmpdir:
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if settings_folder is None:
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settings_folder = tmpdir
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server = lt.ThingServer(settings_folder=settings_folder)
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server.add_thing(cam, "camera")
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with TestClient(server.app) as test_client:
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client = lt.ThingClient.from_url("camera", client=test_client)
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yield client
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del server
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del cam
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