def test_someSatellitesUsed(self):
"""
Tests a beacon information with a bunch of satellites, some of
them used in computing a fix.
"""
bi = base.BeaconInformation()
for prn in range(1, 10):
satellite = base.Satellite(identifier=prn, **self.satelliteKwargs)
bi.seenBeacons.add(satellite)
if prn % 2:
bi.usedBeacons.add(satellite)
self.assertEqual(len(bi.seenBeacons), 9)
self.assertEqual(len(bi.usedBeacons), 5)
self.assertEqual(
repr(bi), "<BeaconInformation (used beacons (5): ["
"<Satellite (1), azimuth: 1, elevation: 1, snr: 1.0>, "
"<Satellite (3), azimuth: 1, elevation: 1, snr: 1.0>, "
"<Satellite (5), azimuth: 1, elevation: 1, snr: 1.0>, "
"<Satellite (7), azimuth: 1, elevation: 1, snr: 1.0>, "
"<Satellite (9), azimuth: 1, elevation: 1, snr: 1.0>], "
"unused beacons: ["
"<Satellite (2), azimuth: 1, elevation: 1, snr: 1.0>, "
"<Satellite (4), azimuth: 1, elevation: 1, snr: 1.0>, "
"<Satellite (6), azimuth: 1, elevation: 1, snr: 1.0>, "
"<Satellite (8), azimuth: 1, elevation: 1, snr: 1.0>])>")
def _fixGSV(self):
"""
Parses partial visible satellite information from a GSV sentence.
"""
# To anyone who knows NMEA, this method's name should raise a chuckle's
# worth of schadenfreude. 'Fix' GSV? Hah! Ludicrous.
beaconInformation = base.BeaconInformation()
self._sentenceData["_partialBeaconInformation"] = beaconInformation
keys = "satellitePRN", "azimuth", "elevation", "signalToNoiseRatio"
for index in range(4):
prn, azimuth, elevation, snr = [
getattr(self.currentSentence, attr)
for attr in ("%s_%i" % (key, index) for key in keys)
]
if prn is None or snr is None:
# The peephole optimizer optimizes the jump away, meaning that
# coverage.py thinks it isn't covered. It is. Replace it with
# break, and watch the test case fail.
# ML thread about this issue: http://goo.gl/1KNUi
# Related CPython bug: http://bugs.python.org/issue2506
continue
satellite = base.Satellite(prn, azimuth, elevation, snr)
beaconInformation.seenBeacons.add(satellite)
def test_minimal(self):
"""
Tests a minimal satellite that only has a known PRN.
Tests that the azimuth, elevation and signal to noise ratios
are L{None} and verifies the repr.
"""
s = base.Satellite(1)
self.assertEqual(s.identifier, 1)
self.assertIsNone(s.azimuth)
self.assertIsNone(s.elevation)
self.assertIsNone(s.signalToNoiseRatio)
self.assertEqual(repr(s), "<Satellite (1), azimuth: None, "
"elevation: None, snr: None>")
def test_simple(self):
"""
Tests a minimal satellite that only has a known PRN.
Tests that the azimuth, elevation and signal to noise ratios
are correct and verifies the repr.
"""
s = base.Satellite(
identifier=1, azimuth=270.0, elevation=30.0, signalToNoiseRatio=25.0
)
self.assertEqual(s.identifier, 1)
self.assertEqual(s.azimuth, 270.0)
self.assertEqual(s.elevation, 30.0)
self.assertEqual(s.signalToNoiseRatio, 25.0)
self.assertEqual(
repr(s), "<Satellite (1), azimuth: 270.0, " "elevation: 30.0, snr: 25.0>"
)
def _buildSatellite(**kw):
kwargs = dict(self.satelliteKwargs)
kwargs.update(kw)
return base.Satellite(**kwargs)
