Add a test for grey world AWB

Signed-off-by: David Plowman <[email protected]>

tests/grey_world.py

@@ -0,0 +1,18 @@
+#!/usr/bin/python3
+import time
+
+from picamera2 import Picamera2, Preview
+
+# Here we load up the tuning for the HQ cam and alter the default exposure profile.
+# For more information on what can be changed, see chapter 5 in
+# https://datasheets.raspberrypi.com/camera/raspberry-pi-camera-guide.pdf
+
+tuning = Picamera2.load_tuning_file("imx477.json")
+awb = Picamera2.find_tuning_algo(tuning, "rpi.awb")
+awb.clear()
+awb['bayes'] = 0
+picam2 = Picamera2(tuning=tuning)
+picam2.configure(picam2.create_preview_configuration())
+picam2.start()
+time.sleep(2)
+picam2.stop()

tests/test_list.txt

@@ -71,6 +71,7 @@ tests/easy_video2.py
 tests/egl_leak.py
 tests/encoder_start_stop.py
 tests/ffmpeg_abort.py
+tests/grey_world.py
 tests/imx708_device.py
 tests/large_datagram.py
 tests/mjpeg_server.py