55 lines
1.6 KiB
Python
55 lines
1.6 KiB
Python
from fastapi.testclient import TestClient
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from PIL import Image
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import numpy as np
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from pytest import fixture
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from labthings_fastapi.server import ThingServer
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from labthings_fastapi.client import ThingClient
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from openflexure_microscope_server.things.camera.picamera import StreamingPiCamera2
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@fixture(scope="module")
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def client():
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"""Initialise a test client for the StreamingPiCamera2 Thing.
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This fixture:
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* Sets up a ThingServer,
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* Registers a StreamingPiCamera2 instance at the "/camera/" endpoint
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* Provides a ThingClient for interacting with it during tests.
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"""
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server = ThingServer()
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server.add_thing(StreamingPiCamera2(), "/camera/")
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with TestClient(server.app) as test_client:
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client = ThingClient.from_url("/camera/", client=test_client)
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yield client
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def test_calibration(client):
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"""Check that full auto calibrate completes without an exception."""
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client.full_auto_calibrate()
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def test_jpeg_and_array(client):
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"""Check that a jpeg grabbed from the stream is the same size as other captures.
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Compare it to an array capture and a jpeg capture.
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"""
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# Grab a jpeg from the stream
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blob = client.grab_jpeg()
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mjpeg_frame = Image.open(blob.open())
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assert mjpeg_frame
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# Capture a jpeg
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blob = client.capture_jpeg(resolution="main")
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jpeg_capture = Image.open(blob.open())
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assert jpeg_capture
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# Capture an array
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arrlist = client.capture_array(stream_name="main")
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array_main = np.array(arrlist)
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# Verify image sizes are the same
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assert mjpeg_frame.size == jpeg_capture.size
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assert array_main.shape[1::-1] == jpeg_capture.size
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