# -*- coding: utf-8 -*-
# Copyright (c) 2015-2016, Exa Analytics Development Team
# Distributed under the terms of the Apache License 2.0
'''
Tests for :mod:`~exa.relational.constant`
############################################
Tests the table of physical constants.
'''
import numpy as np
import pandas as pd
from exa.test import UnitTester
from exa.relational import Constant
[docs]class TestConstant(UnitTester):
'''
Check the physical constants table.
'''
[docs] def test_table(self):
'''
Check that the table can be converted to a :class:`~pandas.DataFrame`.
'''
self.assertIsInstance(Constant.to_frame(), pd.DataFrame)
[docs] def test_value(self):
'''
Check data values.
'''
hartree = Constant['Eh']
self.assertTrue(np.isclose(hartree, 4.35974434*10**-18))
hartree = Constant['hartree']
self.assertTrue(np.isclose(hartree, 4.35974434*10**-18))