def testInvalid(self):
"""Test that we reject timespans that should not exist.
"""
with self.assertRaises(ValueError):
Timespan(TimeConverter().max_time, None)
with self.assertRaises(ValueError):
Timespan(TimeConverter().max_time, TimeConverter().max_time)
with self.assertRaises(ValueError):
Timespan(None, TimeConverter().epoch)
with self.assertRaises(ValueError):
Timespan(TimeConverter().epoch, TimeConverter().epoch)
t = TimeConverter().nsec_to_astropy(TimeConverter().max_nsec - 1)
with self.assertRaises(ValueError):
Timespan(t, t)
with self.assertRaises(ValueError):
Timespan.fromInstant(t)
def testFromInstant(self):
"""Test construction of instantaneous timespans.
"""
self.assertEqual(Timespan.fromInstant(self.timestamps[0]),
Timespan(self.timestamps[0], self.timestamps[0]))