611c663625
The false alarm seen with following GpsData, where lock_state is 0 and
satellite_count and signal are positive value :
GpsData(gpsd_running=1, lock_state=0, satellite_count=22,
signal_quality_db=SignalQualityDb(min=28.0, max=36.0, avg=32.954))
SKY report of Gpsd data gives satellite count and signal_quality_db.
TPV report of Gpsd data gives lock_state. The code was written with
the assumption: SKY report always received only after TPV report. In long
running system, it is observed the order is not guaranteed (5 out-of-
order receipt in 2 days).
This commit fixes the issue by handling out-of-order TPV and SKY report.
Unit tests has been added to check out-of-order handling.
TEST PLAN:
PASS: Unit test with out-of-order TPV and SKY reports
PASS: Deploy gnss-monitor instance and test functionality
PASS: Run in loop to verify GpsData output
sudo python /usr/rootdirs/opt/collectd/extensions/python/ptp_gnss_monitor_cli.py --devices /dev/ttyACM0
Closes-bug: 2127121
Change-Id: I80594f5a3a1210213c6f688822711b9c2e4e84a1
Signed-off-by: Tara Nath Subedi <tara.subedi@windriver.com>