Consolidate the BaseCamera, CameraStub, and CameraProtocol, move StreamingPiCamera2 to this repo

hardware-specific-tests/picamera2/test_tuning.py

@@ -0,0 +1,81 @@
+import os
+from picamera2 import Picamera2
+from labthings_picamera2 import recalibrate_utils
+
+import pytest
+
+
+MODEL = Picamera2.global_camera_info()[0]['Model']
+
+
+def check_camera_available():
+    assert len(Picamera2.global_camera_info()) >= 1
+
+
+def load_default_tuning():
+    fname = f"{MODEL}.json"
+    return Picamera2.load_tuning_file(fname)
+
+
+def generate_bad_tuning():
+    default_tuning = load_default_tuning()
+    bad_tuning = default_tuning.copy()
+    bad_tuning["version"] = 999
+    return bad_tuning
+
+
+def print_tuning(read_file=False):
+    key = "LIBCAMERA_RPI_TUNING_FILE"
+    if key in os.environ:
+        print(f"Tuning file environment variable: {os.environ[key]}")
+        if read_file:
+            with open(os.environ[key], "r") as f:
+                print(f.read())
+    else:
+        print("Tuning file environment variable not set")
+
+
+def _test_bad_tuning_after_good_tuning(configure):
+    bad_tuning = generate_bad_tuning()
+    default_tuning = load_default_tuning()
+    print_tuning()
+    print("opening camera with explicitly specified tuning")
+    with Picamera2(tuning=default_tuning) as cam:
+        print_tuning()
+        if configure:
+            cam.configure(cam.create_preview_configuration())
+    del cam
+    recalibrate_utils.recreate_camera_manager()
+    print(f"Opening camera with tuning['version'] = {bad_tuning['version']}")
+    with pytest.raises(IndexError):
+        # The bad version should cause a problem
+        cam = Picamera2(tuning=bad_tuning)
+        print_tuning()
+        print("Success (not expected)!")
+        del cam
+    recalibrate_utils.recreate_camera_manager()
+    with Picamera2(tuning=default_tuning) as cam:
+        # Reload the camera with working tuning, or it will stop responding
+        # and fail future tests
+        pass
+    del cam
+
+
+@pytest.mark.filterwarnings("ignore: Exception ignored")
+def test_bad_tuning_after_good_tuning_noconfigure():
+    _test_bad_tuning_after_good_tuning(False)
+
+
+@pytest.mark.filterwarnings("ignore: Exception ignored")
+def test_bad_tuning_after_good_tuning_configure():
+    _test_bad_tuning_after_good_tuning(True)
+
+
+@pytest.mark.filterwarnings("ignore: Exception ignored")
+def test_bad_tuning_after_good_tuning_noconfigure2():
+    _test_bad_tuning_after_good_tuning(False)
+
+
+@pytest.mark.filterwarnings("ignore: Exception ignored")
+def test_bad_tuning_after_good_tuning_configure2():
+    _test_bad_tuning_after_good_tuning(True)