def test_selections(self):
'''
Check that isotopes can be selected in any manner.
'''
self.assertIsInstance(Isotope.get_by_strid('1H'), Isotope)
self.assertIsInstance(Isotope[175], Isotope)
self.assertIsInstance(Isotope[0], Isotope)
self.assertIsInstance(Isotope.get_by_symbol('H'), list)
def test_data(self):
'''
Test the integrity of the database data.
'''
self.assertTrue(Isotope.get_by_strid('1H').Z == 1)