/usr/lib/python2.7/dist-packages/pint/testsuite/test_unit.py is in python-pint 0.8.1-2.
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from __future__ import division, unicode_literals, print_function, absolute_import
import copy
import math
from pint.registry import (UnitRegistry, LazyRegistry)
from pint.util import (UnitsContainer, ParserHelper)
from pint import DimensionalityError, UndefinedUnitError
from pint.compat import u, np, string_types
from pint.testsuite import QuantityTestCase, helpers
from pint.testsuite.parameterized import ParameterizedTestCase
class TestUnit(QuantityTestCase):
def test_creation(self):
for arg in ('meter', UnitsContainer(meter=1), self.U_('m')):
self.assertEqual(self.U_(arg)._units, UnitsContainer(meter=1))
self.assertRaises(TypeError, self.U_, 1)
def test_deepcopy(self):
x = self.U_(UnitsContainer(meter=1))
self.assertEqual(x, copy.deepcopy(x))
def test_unit_repr(self):
x = self.U_(UnitsContainer(meter=1))
self.assertEqual(str(x), 'meter')
self.assertEqual(repr(x), "<Unit('meter')>")
def test_unit_formatting(self):
x = self.U_(UnitsContainer(meter=2, kilogram=1, second=-1))
for spec, result in (('{0}', str(x)), ('{0!s}', str(x)),
('{0!r}', repr(x)),
('{0:L}', r'\frac{\mathrm{kilogram} \cdot \mathrm{meter}^{2}}{\mathrm{second}}'),
('{0:P}', 'kilogram·meter²/second'),
('{0:H}', 'kilogram meter<sup>2</sup>/second'),
('{0:C}', 'kilogram*meter**2/second'),
('{0:Lx}', r'\si[]{\kilo\gram\meter\squared\per\second}'),
('{0:~}', 'kg * m ** 2 / s'),
('{0:L~}', r'\frac{\mathrm{kg} \cdot \mathrm{m}^{2}}{\mathrm{s}}'),
('{0:P~}', 'kg·m²/s'),
('{0:H~}', 'kg m<sup>2</sup>/s'),
('{0:C~}', 'kg*m**2/s'),
):
self.assertEqual(spec.format(x), result)
def test_unit_default_formatting(self):
ureg = UnitRegistry()
x = ureg.Unit(UnitsContainer(meter=2, kilogram=1, second=-1))
for spec, result in (('L', r'\frac{\mathrm{kilogram} \cdot \mathrm{meter}^{2}}{\mathrm{second}}'),
('P', 'kilogram·meter²/second'),
('H', 'kilogram meter<sup>2</sup>/second'),
('C', 'kilogram*meter**2/second'),
('~', 'kg * m ** 2 / s'),
('L~', r'\frac{\mathrm{kg} \cdot \mathrm{m}^{2}}{\mathrm{s}}'),
('P~', 'kg·m²/s'),
('H~', 'kg m<sup>2</sup>/s'),
('C~', 'kg*m**2/s'),
):
ureg.default_format = spec
self.assertEqual('{0}'.format(x), result,
'Failed for {0}, {1}'.format(spec, result))
def test_unit_mul(self):
x = self.U_('m')
self.assertEqual(x*1, self.Q_(1, 'm'))
self.assertEqual(x*0.5, self.Q_(0.5, 'm'))
self.assertEqual(x*self.Q_(1, 'm'), self.Q_(1, 'm**2'))
self.assertEqual(1*x, self.Q_(1, 'm'))
def test_unit_div(self):
x = self.U_('m')
self.assertEqual(x/1, self.Q_(1, 'm'))
self.assertEqual(x/0.5, self.Q_(2.0, 'm'))
self.assertEqual(x/self.Q_(1, 'm'), self.Q_(1))
def test_unit_rdiv(self):
x = self.U_('m')
self.assertEqual(1/x, self.Q_(1, '1/m'))
def test_unit_pow(self):
x = self.U_('m')
self.assertEqual(x**2, self.U_('m**2'))
def test_unit_hash(self):
x = self.U_('m')
self.assertEqual(hash(x), hash(x._units))
def test_unit_eqs(self):
x = self.U_('m')
self.assertEqual(x, self.U_('m'))
self.assertNotEqual(x, self.U_('cm'))
self.assertEqual(x, self.Q_(1, 'm'))
self.assertNotEqual(x, self.Q_(2, 'm'))
self.assertEqual(x, UnitsContainer({'meter': 1}))
y = self.U_('cm/m')
self.assertEqual(y, 0.01)
self.assertEqual(self.U_('byte') == self.U_('byte'), True)
self.assertEqual(self.U_('byte') != self.U_('byte'), False)
def test_unit_cmp(self):
x = self.U_('m')
self.assertLess(x, self.U_('km'))
self.assertGreater(x, self.U_('mm'))
y = self.U_('m/mm')
self.assertGreater(y, 1)
self.assertLess(y, 1e6)
def test_dimensionality(self):
x = self.U_('m')
self.assertEqual(x.dimensionality, UnitsContainer({'[length]': 1}))
def test_dimensionless(self):
self.assertTrue(self.U_('m/mm').dimensionless)
self.assertFalse(self.U_('m').dimensionless)
def test_unit_casting(self):
self.assertEqual(int(self.U_('m/mm')), 1000)
self.assertEqual(float(self.U_('mm/m')), 1e-3)
self.assertEqual(complex(self.U_('mm/mm')), 1+0j)
@helpers.requires_numpy()
def test_array_interface(self):
import numpy as np
x = self.U_('m')
arr = np.ones(10)
self.assertQuantityEqual(arr*x, self.Q_(arr, 'm'))
self.assertQuantityEqual(arr/x, self.Q_(arr, '1/m'))
self.assertQuantityEqual(x/arr, self.Q_(arr, 'm'))
class TestRegistry(QuantityTestCase):
FORCE_NDARRAY = False
def setup(self):
self.ureg.autoconvert_offset_to_baseunit = False
def test_base(self):
ureg = UnitRegistry(None)
ureg.define('meter = [length]')
self.assertRaises(ValueError, ureg.define, 'meter = [length]')
self.assertRaises(TypeError, ureg.define, list())
x = ureg.define('degC = kelvin; offset: 273.15')
def test_define(self):
ureg = UnitRegistry(None)
self.assertIsInstance(dir(ureg), list)
self.assertGreater(len(dir(ureg)), 0)
def test_load(self):
import pkg_resources
from pint import unit
data = pkg_resources.resource_filename(unit.__name__, 'default_en.txt')
ureg1 = UnitRegistry()
ureg2 = UnitRegistry(data)
self.assertEqual(dir(ureg1), dir(ureg2))
self.assertRaises(ValueError, UnitRegistry(None).load_definitions, 'notexisting')
def test_default_format(self):
ureg = UnitRegistry()
q = ureg.meter
s1 = '{0}'.format(q)
s2 = '{0:~}'.format(q)
ureg.default_format = '~'
s3 = '{0}'.format(q)
self.assertEqual(s2, s3)
self.assertNotEqual(s1, s3)
self.assertEqual(ureg.default_format, '~')
def test_parse_number(self):
self.assertEqual(self.ureg.parse_expression('pi'), math.pi)
self.assertEqual(self.ureg.parse_expression('x', x=2), 2)
self.assertEqual(self.ureg.parse_expression('x', x=2.3), 2.3)
self.assertEqual(self.ureg.parse_expression('x * y', x=2.3, y=3), 2.3 * 3)
self.assertEqual(self.ureg.parse_expression('x', x=(1+1j)), (1+1j))
def test_parse_single(self):
self.assertEqual(self.ureg.parse_expression('meter'), self.Q_(1, UnitsContainer(meter=1.)))
self.assertEqual(self.ureg.parse_expression('second'), self.Q_(1, UnitsContainer(second=1.)))
def test_parse_alias(self):
self.assertEqual(self.ureg.parse_expression('metre'), self.Q_(1, UnitsContainer(meter=1.)))
def test_parse_plural(self):
self.assertEqual(self.ureg.parse_expression('meters'), self.Q_(1, UnitsContainer(meter=1.)))
def test_parse_prefix(self):
self.assertEqual(self.ureg.parse_expression('kilometer'), self.Q_(1, UnitsContainer(kilometer=1.)))
#self.assertEqual(self.ureg._units['kilometer'], self.Q_(1000., UnitsContainer(meter=1.)))
def test_parse_complex(self):
self.assertEqual(self.ureg.parse_expression('kilometre'), self.Q_(1, UnitsContainer(kilometer=1.)))
self.assertEqual(self.ureg.parse_expression('kilometres'), self.Q_(1, UnitsContainer(kilometer=1.)))
def test_str_errors(self):
self.assertEqual(str(UndefinedUnitError('rabbits')), "'{0!s}' is not defined in the unit registry".format('rabbits'))
self.assertEqual(str(UndefinedUnitError(('rabbits', 'horses'))), "'{0!s}' are not defined in the unit registry".format(('rabbits', 'horses')))
self.assertEqual(u(str(DimensionalityError('meter', 'second'))),
"Cannot convert from 'meter' to 'second'")
self.assertEqual(str(DimensionalityError('meter', 'second', 'length', 'time')),
"Cannot convert from 'meter' (length) to 'second' (time)")
def test_parse_mul_div(self):
self.assertEqual(self.ureg.parse_expression('meter*meter'), self.Q_(1, UnitsContainer(meter=2.)))
self.assertEqual(self.ureg.parse_expression('meter**2'), self.Q_(1, UnitsContainer(meter=2.)))
self.assertEqual(self.ureg.parse_expression('meter*second'), self.Q_(1, UnitsContainer(meter=1., second=1)))
self.assertEqual(self.ureg.parse_expression('meter/second'), self.Q_(1, UnitsContainer(meter=1., second=-1)))
self.assertEqual(self.ureg.parse_expression('meter/second**2'), self.Q_(1, UnitsContainer(meter=1., second=-2)))
def test_parse_pretty(self):
self.assertEqual(self.ureg.parse_expression('meter/second²'),
self.Q_(1, UnitsContainer(meter=1., second=-2)))
self.assertEqual(self.ureg.parse_expression('m³/s³'),
self.Q_(1, UnitsContainer(meter=3., second=-3)))
self.assertEqual(self.ureg.parse_expression('meter² · second'),
self.Q_(1, UnitsContainer(meter=2., second=1)))
self.assertEqual(self.ureg.parse_expression('meter⁰.⁵·second'),
self.Q_(1, UnitsContainer(meter=0.5, second=1)))
self.assertEqual(self.ureg.parse_expression('meter³⁷/second⁴.³²¹'),
self.Q_(1, UnitsContainer(meter=37, second=-4.321)))
def test_parse_factor(self):
self.assertEqual(self.ureg.parse_expression('42*meter'), self.Q_(42, UnitsContainer(meter=1.)))
self.assertEqual(self.ureg.parse_expression('meter*42'), self.Q_(42, UnitsContainer(meter=1.)))
def test_rep_and_parse(self):
q = self.Q_(1, 'g/(m**2*s)')
self.assertEqual(self.Q_(q.magnitude, str(q.units)), q)
def test_as_delta(self):
parse = self.ureg.parse_units
self.assertEqual(parse('kelvin', as_delta=True), UnitsContainer(kelvin=1))
self.assertEqual(parse('kelvin', as_delta=False), UnitsContainer(kelvin=1))
self.assertEqual(parse('kelvin**(-1)', as_delta=True), UnitsContainer(kelvin=-1))
self.assertEqual(parse('kelvin**(-1)', as_delta=False), UnitsContainer(kelvin=-1))
self.assertEqual(parse('kelvin**2', as_delta=True), UnitsContainer(kelvin=2))
self.assertEqual(parse('kelvin**2', as_delta=False), UnitsContainer(kelvin=2))
self.assertEqual(parse('kelvin*meter', as_delta=True), UnitsContainer(kelvin=1, meter= 1))
self.assertEqual(parse('kelvin*meter', as_delta=False), UnitsContainer(kelvin=1, meter=1))
def test_name(self):
self.assertRaises(UndefinedUnitError, self.ureg.get_name, 'asdf')
def test_symbol(self):
self.assertRaises(UndefinedUnitError, self.ureg.get_symbol, 'asdf')
self.assertEqual(self.ureg.get_symbol('meter'), 'm')
self.assertEqual(self.ureg.get_symbol('second'), 's')
self.assertEqual(self.ureg.get_symbol('hertz'), 'Hz')
self.assertEqual(self.ureg.get_symbol('kilometer'), 'km')
self.assertEqual(self.ureg.get_symbol('megahertz'), 'MHz')
self.assertEqual(self.ureg.get_symbol('millisecond'), 'ms')
def test_imperial_symbol(self):
self.assertEqual(self.ureg.get_symbol('inch'), 'in')
self.assertEqual(self.ureg.get_symbol('foot'), 'ft')
self.assertEqual(self.ureg.get_symbol('inches'), 'in')
self.assertEqual(self.ureg.get_symbol('feet'), 'ft')
self.assertEqual(self.ureg.get_symbol('international_foot'), 'ft')
self.assertEqual(self.ureg.get_symbol('international_inch'), 'in')
def test_pint(self):
p = self.ureg.pint
l = self.ureg.liter
ip = self.ureg.imperial_pint
self.assertLess(p, l)
self.assertLess(p, ip)
def test_wraps(self):
def func(x):
return x
ureg = self.ureg
f0 = ureg.wraps(None, [None, ])(func)
self.assertEqual(f0(3.), 3.)
f0 = ureg.wraps(None, None, )(func)
self.assertEqual(f0(3.), 3.)
f1 = ureg.wraps(None, ['meter', ])(func)
self.assertRaises(ValueError, f1, 3.)
self.assertEqual(f1(3. * ureg.centimeter), 0.03)
self.assertEqual(f1(3. * ureg.meter), 3.)
self.assertRaises(ValueError, f1, 3 * ureg.second)
f1b = ureg.wraps(None, [ureg.meter, ])(func)
self.assertRaises(ValueError, f1b, 3.)
self.assertEqual(f1b(3. * ureg.centimeter), 0.03)
self.assertEqual(f1b(3. * ureg.meter), 3.)
self.assertRaises(ValueError, f1b, 3 * ureg.second)
f1 = ureg.wraps(None, 'meter')(func)
self.assertRaises(ValueError, f1, 3.)
self.assertEqual(f1(3. * ureg.centimeter), 0.03)
self.assertEqual(f1(3. * ureg.meter), 3.)
self.assertRaises(ValueError, f1, 3 * ureg.second)
f2 = ureg.wraps('centimeter', ['meter', ])(func)
self.assertRaises(ValueError, f2, 3.)
self.assertEqual(f2(3. * ureg.centimeter), 0.03 * ureg.centimeter)
self.assertEqual(f2(3. * ureg.meter), 3 * ureg.centimeter)
f3 = ureg.wraps('centimeter', ['meter', ], strict=False)(func)
self.assertEqual(f3(3), 3 * ureg.centimeter)
self.assertEqual(f3(3. * ureg.centimeter), 0.03 * ureg.centimeter)
self.assertEqual(f3(3. * ureg.meter), 3. * ureg.centimeter)
def gfunc(x, y):
return x + y
g0 = ureg.wraps(None, [None, None])(gfunc)
self.assertEqual(g0(3, 1), 4)
g1 = ureg.wraps(None, ['meter', 'centimeter'])(gfunc)
self.assertRaises(ValueError, g1, 3 * ureg.meter, 1)
self.assertEqual(g1(3 * ureg.meter, 1 * ureg.centimeter), 4)
self.assertEqual(g1(3 * ureg.meter, 1 * ureg.meter), 3 + 100)
def hfunc(x, y):
return x, y
h0 = ureg.wraps(None, [None, None])(hfunc)
self.assertEqual(h0(3, 1), (3, 1))
h1 = ureg.wraps(['meter', 'centimeter'], [None, None])(hfunc)
self.assertEqual(h1(3, 1), [3 * ureg.meter, 1 * ureg.cm])
h2 = ureg.wraps(('meter', 'centimeter'), [None, None])(hfunc)
self.assertEqual(h2(3, 1), (3 * ureg.meter, 1 * ureg.cm))
h3 = ureg.wraps((None,), (None, None))(hfunc)
self.assertEqual(h3(3, 1), (3, 1))
def test_wrap_referencing(self):
ureg = self.ureg
def gfunc(x, y):
return x + y
def gfunc2(x, y):
return x ** 2 + y
def gfunc3(x, y):
return x ** 2 * y
rst = 3. * ureg.meter + 1. * ureg.centimeter
g0 = ureg.wraps('=A', ['=A', '=A'])(gfunc)
self.assertEqual(g0(3. * ureg.meter, 1. * ureg.centimeter), rst.to('meter'))
self.assertEqual(g0(3, 1), 4)
g1 = ureg.wraps('=A', ['=A', '=A'])(gfunc)
self.assertEqual(g1(3. * ureg.meter, 1. * ureg.centimeter), rst.to('centimeter'))
g2 = ureg.wraps('=A', ['=A', '=A'])(gfunc)
self.assertEqual(g2(3. * ureg.meter, 1. * ureg.centimeter), rst.to('meter'))
g3 = ureg.wraps('=A**2', ['=A', '=A**2'])(gfunc2)
a = 3. * ureg.meter
b = (2. * ureg.centimeter) ** 2
self.assertEqual(g3(a, b), gfunc2(a, b))
self.assertEqual(g3(3, 2), gfunc2(3, 2))
g4 = ureg.wraps('=A**2 * B', ['=A', '=B'])(gfunc3)
self.assertEqual(g4(3. * ureg.meter, 2. * ureg.second), ureg('(3*meter)**2 * 2 *second'))
self.assertEqual(g4(3. * ureg.meter, 2.), ureg('(3*meter)**2 * 2'))
self.assertEqual(g4(3., 2. * ureg.second), ureg('3**2 * 2 * second'))
def test_check(self):
def func(x):
return x
ureg = self.ureg
f0 = ureg.check('[length]')(func)
self.assertRaises(AttributeError, f0, 3.)
self.assertEqual(f0(3. * ureg.centimeter), 0.03 * ureg.meter)
self.assertRaises(DimensionalityError, f0, 3. * ureg.kilogram)
f0b = ureg.check(ureg.meter)(func)
self.assertRaises(AttributeError, f0b, 3.)
self.assertEqual(f0b(3. * ureg.centimeter), 0.03 * ureg.meter)
self.assertRaises(DimensionalityError, f0b, 3. * ureg.kilogram)
def gfunc(x, y):
return x / y
g0 = ureg.check(None, None)(gfunc)
self.assertEqual(g0(6, 2), 3)
self.assertEqual(g0(6 * ureg.parsec, 2), 3 * ureg.parsec)
g1 = ureg.check('[speed]', '[time]')(gfunc)
self.assertRaises(AttributeError, g1, 3.0, 1)
self.assertRaises(DimensionalityError, g1, 1 * ureg.parsec, 1 * ureg.angstrom)
self.assertRaises(TypeError, g1, 1 * ureg.km / ureg.hour, 1 * ureg.hour, 3.0)
self.assertEqual(g1(3.6 * ureg.km / ureg.hour, 1 * ureg.second), 1 * ureg.meter / ureg.second ** 2)
g2 = ureg.check('[speed]')(gfunc)
self.assertRaises(AttributeError, g2, 3.0, 1)
self.assertRaises(DimensionalityError, g2, 2 * ureg.parsec)
self.assertRaises(DimensionalityError, g2, 2 * ureg.parsec, 1.0)
self.assertEqual(g2(2.0 * ureg.km / ureg.hour, 2), 1 * ureg.km / ureg.hour)
g3 = ureg.check('[speed]', '[time]', '[mass]')(gfunc)
self.assertRaises(DimensionalityError, g3, 1 * ureg.parsec, 1 * ureg.angstrom)
self.assertRaises(DimensionalityError, g3, 1 * ureg.parsec, 1 * ureg.angstrom, 1 * ureg.kilogram)
def test_to_ref_vs_to(self):
self.ureg.autoconvert_offset_to_baseunit = True
q = 8. * self.ureg.inch
t = 8. * self.ureg.degF
dt = 8. * self.ureg.delta_degF
self.assertEqual(q.to('yard').magnitude, self.ureg._units['inch'].converter.to_reference(8.))
self.assertEqual(t.to('kelvin').magnitude, self.ureg._units['degF'].converter.to_reference(8.))
self.assertEqual(dt.to('kelvin').magnitude, self.ureg._units['delta_degF'].converter.to_reference(8.))
def test_redefinition(self):
d = UnitRegistry().define
with self.capture_log() as buffer:
d('meter = [fruits]')
d('kilo- = 1000')
d('[speed] = [vegetables]')
# aliases
d('bla = 3.2 meter = inch')
d('myk- = 1000 = kilo-')
self.assertEqual(len(buffer), 5)
def test_convert_parse_str(self):
ureg = self.ureg
self.assertEqual(ureg.convert(1, 'meter', 'inch'),
ureg.convert(1, UnitsContainer(meter=1), UnitsContainer(inch=1)))
@helpers.requires_numpy()
def test_convert_inplace(self):
ureg = self.ureg
# Conversions with single units take a different codepath than
# Conversions with more than one unit.
src_dst1 = UnitsContainer(meter=1), UnitsContainer(inch=1)
src_dst2 = UnitsContainer(meter=1, second=-1), UnitsContainer(inch=1, minute=-1)
for src, dst in (src_dst1, src_dst2):
v = ureg.convert(1, src, dst),
a = np.ones((3, 1))
ac = np.ones((3, 1))
r1 = ureg.convert(a, src, dst)
np.testing.assert_allclose(r1, v * ac)
self.assertIsNot(r1, a)
r2 = ureg.convert(a, src, dst, inplace=True)
np.testing.assert_allclose(r2, v * ac)
self.assertIs(r2, a)
def test_repeated_convert(self):
# Because of caching, repeated conversions were failing.
self.ureg.convert(1, "m", "ft")
self.ureg.convert(1, "m", "ft")
def test_singular_SI_prefix_convert(self):
# Fix for issue 156
self.ureg.convert(1, 'mm', 'm')
self.ureg.convert(1, 'ms', 's')
self.ureg.convert(1, 'm', 'mm')
self.ureg.convert(1, 's', 'ms')
def test_parse_units(self):
ureg = self.ureg
self.assertEqual(ureg.parse_units(''), ureg.Unit(''))
self.assertRaises(ValueError, ureg.parse_units, '2 * meter')
class TestCompatibleUnits(QuantityTestCase):
FORCE_NDARRAY= False
def _test(self, input_units):
gd = self.ureg.get_dimensionality
dim = gd(input_units)
equiv = self.ureg.get_compatible_units(input_units)
for eq in equiv:
self.assertEqual(gd(eq), dim)
self.assertEqual(equiv, self.ureg.get_compatible_units(dim))
def _test2(self, units1, units2):
equiv1 = self.ureg.get_compatible_units(units1)
equiv2 = self.ureg.get_compatible_units(units2)
self.assertEqual(equiv1, equiv2)
def test_many(self):
self._test(self.ureg.meter)
self._test(self.ureg.seconds)
self._test(self.ureg.newton)
self._test(self.ureg.kelvin)
def test_context_sp(self):
gd = self.ureg.get_dimensionality
# length, frequency, energy
valid = [gd(self.ureg.meter), gd(self.ureg.hertz),
gd(self.ureg.joule), 1/gd(self.ureg.meter)]
with self.ureg.context('sp'):
equiv = self.ureg.get_compatible_units(self.ureg.meter)
result = set()
for eq in equiv:
dim = gd(eq)
result.add(dim)
self.assertIn(dim, valid)
self.assertEqual(len(result), len(valid))
def test_get_base_units(self):
ureg = UnitRegistry()
self.assertEqual(ureg.get_base_units(''), (1, ureg.Unit('')))
self.assertEqual(ureg.get_base_units('meter'), ureg.get_base_units(ParserHelper(meter=1)))
def test_get_compatible_units(self):
ureg = UnitRegistry()
self.assertEqual(ureg.get_compatible_units(''), frozenset())
self.assertEqual(ureg.get_compatible_units('meter'),
ureg.get_compatible_units(ParserHelper(meter=1)))
class TestRegistryWithDefaultRegistry(TestRegistry):
@classmethod
def setUpClass(cls):
from pint import _DEFAULT_REGISTRY
cls.ureg = _DEFAULT_REGISTRY
cls.Q_ = cls.ureg.Quantity
def test_lazy(self):
x = LazyRegistry()
x.test = 'test'
self.assertIsInstance(x, UnitRegistry)
y = LazyRegistry()
q = y('meter')
self.assertIsInstance(y, UnitRegistry)
def test_redefinition(self):
d = self.ureg.define
self.assertRaises(ValueError, d, 'meter = [time]')
self.assertRaises(ValueError, d, 'kilo- = 1000')
self.assertRaises(ValueError, d, '[speed] = [length]')
# aliases
self.assertIn('inch', self.ureg._units)
self.assertRaises(ValueError, d, 'bla = 3.2 meter = inch')
self.assertRaises(ValueError, d, 'myk- = 1000 = kilo-')
class TestConvertWithOffset(QuantityTestCase, ParameterizedTestCase):
# The dicts in convert_with_offset are used to create a UnitsContainer.
# We create UnitsContainer to avoid any auto-conversion of units.
convert_with_offset = [
(({'degC': 1}, {'degC': 1}), 10),
(({'degC': 1}, {'kelvin': 1}), 283.15),
(({'degC': 1}, {'degC': 1, 'millimeter': 1, 'meter': -1}), 'error'),
(({'degC': 1}, {'kelvin': 1, 'millimeter': 1, 'meter': -1}), 283150),
(({'kelvin': 1}, {'degC': 1}), -263.15),
(({'kelvin': 1}, {'kelvin': 1}), 10),
(({'kelvin': 1}, {'degC': 1, 'millimeter': 1, 'meter': -1}), 'error'),
(({'kelvin': 1}, {'kelvin': 1, 'millimeter': 1, 'meter': -1}), 10000),
(({'degC': 1, 'millimeter': 1, 'meter': -1}, {'degC': 1}), 'error'),
(({'degC': 1, 'millimeter': 1, 'meter': -1}, {'kelvin': 1}), 'error'),
(({'degC': 1, 'millimeter': 1, 'meter': -1}, {'degC': 1, 'millimeter': 1, 'meter': -1}), 10),
(({'degC': 1, 'millimeter': 1, 'meter': -1}, {'kelvin': 1, 'millimeter': 1, 'meter': -1}), 'error'),
(({'kelvin': 1, 'millimeter': 1, 'meter': -1}, {'degC': 1}), -273.14),
(({'kelvin': 1, 'millimeter': 1, 'meter': -1}, {'kelvin': 1}), 0.01),
(({'kelvin': 1, 'millimeter': 1, 'meter': -1}, {'degC': 1, 'millimeter': 1, 'meter': -1}), 'error'),
(({'kelvin': 1, 'millimeter': 1, 'meter': -1}, {'kelvin': 1, 'millimeter': 1, 'meter': -1}), 10),
(({'degC': 2}, {'kelvin': 2}), 'error'),
(({'degC': 1, 'degF': 1}, {'kelvin': 2}), 'error'),
(({'degC': 1, 'kelvin': 1}, {'kelvin': 2}), 'error'),
]
@ParameterizedTestCase.parameterize(("input", "expected_output"),
convert_with_offset)
def test_to_and_from_offset_units(self, input_tuple, expected):
src, dst = input_tuple
src, dst = UnitsContainer(src), UnitsContainer(dst)
value = 10.
convert = self.ureg.convert
if isinstance(expected, string_types):
self.assertRaises(DimensionalityError, convert, value, src, dst)
if src != dst:
self.assertRaises(DimensionalityError, convert, value, dst, src)
else:
self.assertQuantityAlmostEqual(convert(value, src, dst),
expected, atol=0.001)
if src != dst:
self.assertQuantityAlmostEqual(convert(expected, dst, src),
value, atol=0.001)
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