54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
"""Test data collection from the Raspberry Picamera."""
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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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import pytest
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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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@pytest.fixture(scope="module")
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def client() -> lt.ThingClient:
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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 = lt.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 = lt.ThingClient.from_url("/camera/", client=test_client)
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yield client
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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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# Verify throws an error if there are issues with the image
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mjpeg_frame.verify()
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assert mjpeg_frame.format == "JPEG"
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# Capture a jpeg
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blob = client.capture_jpeg(stream_name="main")
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jpeg_capture = Image.open(blob.open())
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jpeg_capture.verify()
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assert jpeg_capture.format == "JPEG"
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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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