Split calibration and aquisition tests

hardware-specific-tests/picamera2/test_calibration.py

@@ -0,0 +1,49 @@
+"""Test data collection from the Raspberry Picamera."""
+
+import tempfile
+
+from fastapi.testclient import TestClient
+from pytest import fixture
+
+import labthings_fastapi as lt
+
+from openflexure_microscope_server.things.camera.picamera import StreamingPiCamera2
+
+
+@fixture()
+def picamera_thing() -> StreamingPiCamera2:
+    """Return a StreamingPiCamera2 Thing.
+
+    This is the Thing that the fixture client uses. It can be used to probe the
+    Thing directly to check actions had the expected response.
+    """
+    return StreamingPiCamera2()
+
+
+@fixture()
+def client(picamera_thing) -> lt.ThingClient:
+    """Initialise a test client for the StreamingPiCamera2 Thing.
+
+    This fixture:
+
+    * Sets up a ThingServer,
+    * Registers a StreamingPiCamera2 instance at the "/camera/" endpoint
+    * Provides a ThingClient for interacting with it during tests.
+    """
+    temp_folder = tempfile.TemporaryDirectory()
+    server = lt.ThingServer(settings_folder=temp_folder.name)
+    server.add_thing(picamera_thing, "/camera/")
+    with TestClient(server.app) as test_client:
+        client = lt.ThingClient.from_url("/camera/", client=test_client)
+        yield client
+
+
+def test_calibration(picamera_thing, client):
+    """Check that full auto calibrate completes without an exception."""
+    tuning = picamera_thing.tuning
+    default_tuning = picamera_thing.default_tuning
+    # Tuning should start the same as the server is loading with no settings.
+    assert default_tuning == tuning
+    # After calibration they should be different
+    client.full_auto_calibrate()
+    assert default_tuning != tuning