def test_get_conversion_factor(self):
r"""
Testing the get_conversion_factor function
"""
for unit_in, unit_out, test_fact in self._convertion_factor_test:
fact = UnitConversion.get_conversion_factor(unit_in, unit_out)
fact = round(fact * 1.0E9)
test_fact = round(test_fact * 1.0E9)
msg = 'Get conversion factor for {} to {} failed.'
msg = msg.format(unit_in, unit_out)
#
assert fact == test_fact, msg
