/usr/lib/python3/dist-packages/pint/testsuite/test_unit.py is in python3-pint 0.6-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 | # -*- coding: utf-8 -*-
from __future__ import division, unicode_literals, print_function, absolute_import
import math
import copy
import itertools
import operator as op
from pint.unit import (ScaleConverter, OffsetConverter, UnitsContainer,
Definition, PrefixDefinition, UnitDefinition,
DimensionDefinition, _freeze, Converter, UnitRegistry,
LazyRegistry, ParserHelper)
from pint import DimensionalityError, UndefinedUnitError
from pint.compat import u, unittest, np, string_types
from pint.testsuite import QuantityTestCase, helpers, BaseTestCase
from pint.testsuite.parameterized import ParameterizedTestCase
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)
class TestDefinition(BaseTestCase):
def test_invalid(self):
self.assertRaises(ValueError, Definition.from_string, 'x = [time] * meter')
self.assertRaises(ValueError, Definition.from_string, '[x] = [time] * meter')
def test_prefix_definition(self):
for definition in ('m- = 1e-3', 'm- = 10**-3', 'm- = 0.001'):
x = Definition.from_string(definition)
self.assertIsInstance(x, PrefixDefinition)
self.assertEqual(x.name, 'm')
self.assertEqual(x.aliases, ())
self.assertEqual(x.converter.to_reference(1000), 1)
self.assertEqual(x.converter.from_reference(0.001), 1)
self.assertEqual(str(x), 'm')
x = Definition.from_string('kilo- = 1e-3 = k-')
self.assertIsInstance(x, PrefixDefinition)
self.assertEqual(x.name, 'kilo')
self.assertEqual(x.aliases, ())
self.assertEqual(x.symbol, 'k')
self.assertEqual(x.converter.to_reference(1000), 1)
self.assertEqual(x.converter.from_reference(.001), 1)
x = Definition.from_string('kilo- = 1e-3 = k- = anotherk-')
self.assertIsInstance(x, PrefixDefinition)
self.assertEqual(x.name, 'kilo')
self.assertEqual(x.aliases, ('anotherk', ))
self.assertEqual(x.symbol, 'k')
self.assertEqual(x.converter.to_reference(1000), 1)
self.assertEqual(x.converter.from_reference(.001), 1)
def test_baseunit_definition(self):
x = Definition.from_string('meter = [length]')
self.assertIsInstance(x, UnitDefinition)
self.assertTrue(x.is_base)
self.assertEqual(x.reference, UnitsContainer({'[length]': 1}))
def test_unit_definition(self):
x = Definition.from_string('coulomb = ampere * second')
self.assertIsInstance(x, UnitDefinition)
self.assertFalse(x.is_base)
self.assertIsInstance(x.converter, ScaleConverter)
self.assertEqual(x.converter.scale, 1)
self.assertEqual(x.reference, UnitsContainer(ampere=1, second=1))
x = Definition.from_string('faraday = 96485.3399 * coulomb')
self.assertIsInstance(x, UnitDefinition)
self.assertFalse(x.is_base)
self.assertIsInstance(x.converter, ScaleConverter)
self.assertEqual(x.converter.scale, 96485.3399)
self.assertEqual(x.reference, UnitsContainer(coulomb=1))
x = Definition.from_string('degF = 9 / 5 * kelvin; offset: 255.372222')
self.assertIsInstance(x, UnitDefinition)
self.assertFalse(x.is_base)
self.assertIsInstance(x.converter, OffsetConverter)
self.assertEqual(x.converter.scale, 9/5)
self.assertEqual(x.converter.offset, 255.372222)
self.assertEqual(x.reference, UnitsContainer(kelvin=1))
def test_dimension_definition(self):
x = DimensionDefinition('[time]', '', (), converter='')
self.assertTrue(x.is_base)
self.assertEqual(x.name, '[time]')
x = Definition.from_string('[speed] = [length]/[time]')
self.assertIsInstance(x, DimensionDefinition)
self.assertEqual(x.reference, UnitsContainer({'[length]': 1, '[time]': -1}))
class TestUnitsContainer(QuantityTestCase):
def _test_inplace(self, operator, value1, value2, expected_result):
value1 = copy.copy(value1)
value2 = copy.copy(value2)
id1 = id(value1)
id2 = id(value2)
value1 = operator(value1, value2)
value2_cpy = copy.copy(value2)
self.assertEqual(value1, expected_result)
self.assertEqual(id1, id(value1))
self.assertEqual(value2, value2_cpy)
self.assertEqual(id2, id(value2))
def _test_not_inplace(self, operator, value1, value2, expected_result):
id1 = id(value1)
id2 = id(value2)
value1_cpy = copy.copy(value1)
value2_cpy = copy.copy(value2)
result = operator(value1, value2)
self.assertEqual(expected_result, result)
self.assertEqual(value1, value1_cpy)
self.assertEqual(value2, value2_cpy)
self.assertNotEqual(id(result), id1)
self.assertNotEqual(id(result), id2)
def test_unitcontainer_creation(self):
x = UnitsContainer(meter=1, second=2)
y = UnitsContainer({'meter': 1.0, 'second': 2.0})
self.assertIsInstance(x['meter'], float)
self.assertEqual(x, y)
self.assertIsNot(x, y)
z = copy.copy(x)
self.assertEqual(x, z)
self.assertIsNot(x, z)
z = UnitsContainer(x)
self.assertEqual(x, z)
self.assertIsNot(x, z)
def test_unitcontainer_repr(self):
x = UnitsContainer()
self.assertEqual(str(x), 'dimensionless')
self.assertEqual(repr(x), '<UnitsContainer({})>')
x = UnitsContainer(meter=1, second=2)
self.assertEqual(str(x), 'meter * second ** 2')
self.assertEqual(repr(x), "<UnitsContainer({'meter': 1.0, 'second': 2.0})>")
x = UnitsContainer(meter=1, second=2.5)
self.assertEqual(str(x), 'meter * second ** 2.5')
self.assertEqual(repr(x), "<UnitsContainer({'meter': 1.0, 'second': 2.5})>")
def test_unitcontainer_bool(self):
self.assertTrue(UnitsContainer(meter=1, second=2))
self.assertFalse(UnitsContainer())
def test_unitcontainer_comp(self):
x = UnitsContainer(meter=1, second=2)
y = UnitsContainer(meter=1., second=2)
z = UnitsContainer(meter=1, second=3)
self.assertTrue(x == y)
self.assertFalse(x != y)
self.assertFalse(x == z)
self.assertTrue(x != z)
def test_unitcontainer_arithmetic(self):
x = UnitsContainer(meter=1)
y = UnitsContainer(second=1)
z = UnitsContainer(meter=1, second=-2)
self._test_not_inplace(op.mul, x, y, UnitsContainer(meter=1, second=1))
self._test_not_inplace(op.truediv, x, y, UnitsContainer(meter=1, second=-1))
self._test_not_inplace(op.pow, z, 2, UnitsContainer(meter=2, second=-4))
self._test_not_inplace(op.pow, z, -2, UnitsContainer(meter=-2, second=4))
self._test_inplace(op.imul, x, y, UnitsContainer(meter=1, second=1))
self._test_inplace(op.itruediv, x, y, UnitsContainer(meter=1, second=-1))
self._test_inplace(op.ipow, z, 2, UnitsContainer(meter=2, second=-4))
self._test_inplace(op.ipow, z, -2, UnitsContainer(meter=-2, second=4))
def test_string_comparison(self):
x = UnitsContainer(meter=1)
y = UnitsContainer(second=1)
z = UnitsContainer(meter=1, second=-2)
self.assertEqual(x, 'meter')
self.assertEqual('meter', x)
self.assertNotEqual(x, 'meter ** 2')
self.assertNotEqual(x, 'meter * meter')
self.assertNotEqual(x, 'second')
self.assertEqual(y, 'second')
self.assertEqual(z, 'meter/second/second')
def test_invalid(self):
self.assertRaises(TypeError, UnitsContainer, {1: 2})
self.assertRaises(TypeError, UnitsContainer, {'1': '2'})
d = UnitsContainer()
self.assertRaises(TypeError, d.__setitem__, 1, 2)
self.assertRaises(TypeError, d.__setitem__, '1', '2')
self.assertRaises(TypeError, d.__mul__, list())
self.assertRaises(TypeError, d.__imul__, list())
self.assertRaises(TypeError, d.__pow__, list())
self.assertRaises(TypeError, d.__ipow__, list())
self.assertRaises(TypeError, d.__truediv__, list())
self.assertRaises(TypeError, d.__itruediv__, list())
self.assertRaises(TypeError, d.__rtruediv__, list())
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', 'cm'], [None, None])(hfunc)
self.assertEqual(h1(3, 1), [3 * ureg.meter, 1 * ureg.cm])
h2 = ureg.wraps(('meter', 'cm'), [None, None])(hfunc)
self.assertEqual(h2(3, 1), (3 * ureg.meter, 1 * ureg.cm))
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('cm').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(''), UnitsContainer())
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.units)
self._test(self.ureg.seconds.units)
self._test(self.ureg.newton.units)
self._test(self.ureg.kelvin.units)
def test_context_sp(self):
gd = self.ureg.get_dimensionality
# length, frequency, energy
valid = [gd(self.ureg.meter.units), gd(self.ureg.hertz.units), gd(self.ureg.joule.units)]
with self.ureg.context('sp'):
equiv = self.ureg.get_compatible_units(self.ureg.meter.units)
result = set()
for eq in equiv:
dim = gd(eq)
result.add(_freeze(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, UnitsContainer()))
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(''), (1, UnitsContainer()))
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 TestErrors(BaseTestCase):
def test_errors(self):
x = ('meter', )
msg = "'meter' is not defined in the unit registry"
self.assertEqual(str(UndefinedUnitError(x)), msg)
self.assertEqual(str(UndefinedUnitError(list(x))), msg)
self.assertEqual(str(UndefinedUnitError(set(x))), msg)
msg = "Cannot convert from 'a' (c) to 'b' (d)msg"
ex = DimensionalityError('a', 'b', 'c', 'd', 'msg')
self.assertEqual(str(ex), msg)
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)
|