def test_value_does_not_convert_unitless_values(self):
x = Value(1, None)
with self.assertRaises(ValueError):
x.convert('kg')
def test_conversions(self):
x = Value(25, 'cm')
self.assertAlmostEqual(x.convert('m'), 0.25)
self.assertAlmostEqual(x.convert('cm'), 25)
self.assertAlmostEqual(x.convert('mm'), 250)
self.assertAlmostEqual(x.convert('in'), 9.8425197) # from google
self.assertAlmostEqual(x.convert('ft'), 0.82021) # from google
self.assertAlmostEqual(x.convert('fathoms'),
0.136701662) # from google
self.assertAlmostEqual(x.convert('cubits'), 0.546806649) # from google
x = Value(1, 'kg')
self.assertAlmostEqual(x.convert('kg'), 1)
self.assertAlmostEqual(x.convert('g'), 1000)
self.assertAlmostEqual(x.convert('lbs'), 2.20462) # from google
self.assertAlmostEqual(x.convert('stone'), 0.157473) # from google
x = Value(90, 'deg')
self.assertAlmostEqual(x.convert('rad'), np.pi / 2)
self.assertAlmostEqual(x.convert('deg'), 90)
x = Value(30, 'min')
self.assertAlmostEqual(x.convert('sec'), 30 * 60)
self.assertAlmostEqual(x.convert('minutes'), 30)
self.assertAlmostEqual(x.convert('hours'), 0.5)
x = Value(2, 'days')
self.assertAlmostEqual(x.convert('min'), 2 * 24 * 60)
x = Value(1, 'year')
self.assertAlmostEqual(x.convert('min'), 525948.48)
