'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.'

def test_minimal(self):

    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>')
