48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
from ais_hub.core.stats import Stats
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from ais_hub.parser.gps import GpsParser
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def _withcs(body: str) -> str:
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cs = 0
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for ch in body.encode("ascii"):
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cs ^= ch
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return f"${body}*{cs:02X}"
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def test_rmc_produces_lat_lon_sog_cog():
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p = GpsParser(stats=Stats())
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line = _withcs("GPRMC,123519,A,4807.038,N,01131.000,E,22.4,84.4,230394,3.1,W")
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fix = p.feed("gps_uart", line)
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assert fix is not None
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assert abs(fix.lat - (48 + 7.038 / 60)) < 1e-6
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assert abs(fix.lon - (11 + 31.0 / 60)) < 1e-6
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assert fix.sog == 22.4
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assert fix.cog == 84.4
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def test_gga_supplies_fix_quality_and_hdop():
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p = GpsParser(stats=Stats())
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line = _withcs("GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,")
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fix = p.feed("gps_uart", line)
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assert fix is not None
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assert fix.fix_quality == 1
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assert fix.sats == 8
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assert fix.hdop == 0.9
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assert fix.alt == 545.4
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def test_vtg_speed_from_kmh_when_knots_missing():
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p = GpsParser(stats=Stats())
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line = _withcs("GPVTG,054.7,T,034.4,M,,,010.0,K,A")
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fix = p.feed("gps_uart", line)
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assert fix is not None
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assert fix.cog == 54.7
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# 10 km/h ~ 5.3996 knots
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assert fix.sog is not None and abs(fix.sog - 5.3996) < 1e-3
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def test_bad_checksum_rejected():
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p = GpsParser(stats=Stats())
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fix = p.feed("gps_uart", "$GPRMC,,,,,,,,,,,,*FF")
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assert fix is None
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