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# -*- coding: utf-8 -*-
import itertools
from pint.compat import np
from pint.converters import (ScaleConverter, OffsetConverter, Converter)
from pint.testsuite import helpers, BaseTestCase
class TestConverter(BaseTestCase):
def test_converter(self):
c = Converter()
self.assertTrue(c.is_multiplicative)
self.assertTrue(c.to_reference(8))
self.assertTrue(c.from_reference(8))
def test_multiplicative_converter(self):
c = ScaleConverter(20.)
self.assertEqual(c.from_reference(c.to_reference(100)), 100)
self.assertEqual(c.to_reference(c.from_reference(100)), 100)
def test_offset_converter(self):
c = OffsetConverter(20., 2)
self.assertEqual(c.from_reference(c.to_reference(100)), 100)
self.assertEqual(c.to_reference(c.from_reference(100)), 100)
@helpers.requires_numpy()
def test_converter_inplace(self):
for c in (ScaleConverter(20.), OffsetConverter(20., 2)):
fun1 = lambda x, y: c.from_reference(c.to_reference(x, y), y)
fun2 = lambda x, y: c.to_reference(c.from_reference(x, y), y)
for fun, (inplace, comp) in itertools.product((fun1, fun2),
((True, self.assertIs), (False, self.assertIsNot))):
a = np.ones((1, 10))
ac = np.ones((1, 10))
r = fun(a, inplace)
np.testing.assert_allclose(r, ac)
comp(a, r)
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