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# -*- coding: utf-8 -*-
from __future__ import division, unicode_literals, print_function, absolute_import
from pint.testsuite import TestCase, helpers
@helpers.requires_not_uncertainties()
class TestNotMeasurement(TestCase):
FORCE_NDARRAY = False
def test_instantiate(self):
M_ = self.ureg.Measurement
self.assertRaises(RuntimeError, M_, 4.0, 0.1, 's')
@helpers.requires_uncertainties()
class TestMeasurement(TestCase):
FORCE_NDARRAY = False
def test_simple(self):
M_ = self.ureg.Measurement
M_(4.0, 0.1, 's')
def test_build(self):
M_ = self.ureg.Measurement
v, u = self.Q_(4.0, 's'), self.Q_(.1, 's')
M_(v.magnitude, u.magnitude, 's')
ms = (M_(v.magnitude, u.magnitude, 's'),
M_(v, u.magnitude),
M_(v, u),
v.plus_minus(.1),
v.plus_minus(0.025, True),
v.plus_minus(u),)
for m in ms:
self.assertEqual(m.value, v)
self.assertEqual(m.error, u)
self.assertEqual(m.rel, m.error / abs(m.value))
def test_format(self):
v, u = self.Q_(4.0, 's ** 2'), self.Q_(.1, 's ** 2')
m = self.ureg.Measurement(v, u)
self.assertEqual(str(m), '(4.00 +/- 0.10) second ** 2')
self.assertEqual(repr(m), '<Measurement(4.00, 0.10, second ** 2)>')
#self.assertEqual('{:!s}'.format(m), '(4.00 +/- 0.10) second ** 2')
#self.assertEqual('{:!r}'.format(m), '<Measurement(4.0-, 0.10, second ** 2)>')
self.assertEqual('{0:P}'.format(m), '(4.00 ± 0.10) second²')
self.assertEqual('{0:L}'.format(m), r'\left(4.00 \pm 0.10\right) second^{2}')
self.assertEqual('{0:H}'.format(m), '(4.00 ± 0.10) second<sup>2</sup>')
self.assertEqual('{0:C}'.format(m), '(4.00+/-0.10) second**2')
self.assertEqual('{0:.1f}'.format(m), '(4.0 +/- 0.1) second ** 2')
self.assertEqual('{0:.1fP}'.format(m), '(4.0 ± 0.1) second²')
self.assertEqual('{0:.1fL}'.format(m), r'\left(4.0 \pm 0.1\right) second^{2}')
self.assertEqual('{0:.1fH}'.format(m), '(4.0 ± 0.1) second<sup>2</sup>')
self.assertEqual('{0:.1fC}'.format(m), '(4.0+/-0.1) second**2')
def test_format_paru(self):
v, u = self.Q_(0.20, 's ** 2'), self.Q_(0.01, 's ** 2')
m = self.ureg.Measurement(v, u)
self.assertEqual('{0:uS}'.format(m), '0.200(10) second ** 2')
self.assertEqual('{0:.3uS}'.format(m), '0.2000(100) second ** 2')
self.assertEqual('{0:.3uSP}'.format(m), '0.2000(100) second²')
self.assertEqual('{0:.3uSL}'.format(m), r'0.2000\left(100\right) second^{2}')
self.assertEqual('{0:.3uSH}'.format(m), '0.2000(100) second<sup>2</sup>')
self.assertEqual('{0:.3uSC}'.format(m), '0.2000(100) second**2')
def test_format_u(self):
v, u = self.Q_(0.20, 's ** 2'), self.Q_(0.01, 's ** 2')
m = self.ureg.Measurement(v, u)
self.assertEqual('{0:.3u}'.format(m), '(0.2000 +/- 0.0100) second ** 2')
self.assertEqual('{0:.3uP}'.format(m), '(0.2000 ± 0.0100) second²')
self.assertEqual('{0:.3uL}'.format(m), r'\left(0.2000 \pm 0.0100\right) second^{2}')
self.assertEqual('{0:.3uH}'.format(m), '(0.2000 ± 0.0100) second<sup>2</sup>')
self.assertEqual('{0:.3uC}'.format(m), '(0.2000+/-0.0100) second**2')
def test_format_percu(self):
self.test_format_perce()
v, u = self.Q_(0.20, 's ** 2'), self.Q_(0.01, 's ** 2')
m = self.ureg.Measurement(v, u)
self.assertEqual('{0:.1u%}'.format(m), '(20 +/- 1)% second ** 2')
self.assertEqual('{0:.1u%P}'.format(m), '(20 ± 1)% second²')
self.assertEqual('{0:.1u%L}'.format(m), r'\left(20 \pm 1\right) \% second^{2}')
self.assertEqual('{0:.1u%H}'.format(m), '(20 ± 1)% second<sup>2</sup>')
self.assertEqual('{0:.1u%C}'.format(m), '(20+/-1)% second**2')
def test_format_perce(self):
v, u = self.Q_(0.20, 's ** 2'), self.Q_(0.01, 's ** 2')
m = self.ureg.Measurement(v, u)
self.assertEqual('{0:.1ue}'.format(m), '(2.0 +/- 0.1)e-01 second ** 2')
self.assertEqual('{0:.1ueP}'.format(m), '(2.0 ± 0.1)×10⁻¹ second²')
self.assertEqual('{0:.1ueL}'.format(m), r'\left(2.0 \pm 0.1\right) \times 10^{-1} second^{2}')
self.assertEqual('{0:.1ueH}'.format(m), '(2.0 ± 0.1)e-01 second<sup>2</sup>')
self.assertEqual('{0:.1ueC}'.format(m), '(2.0+/-0.1)e-01 second**2')
def test_raise_build(self):
v, u = self.Q_(1.0, 's'), self.Q_(.1, 's')
o = self.Q_(.1, 'm')
M_ = self.ureg.Measurement
self.assertRaises(ValueError, M_, v, o)
self.assertRaises(ValueError, v.plus_minus, o)
self.assertRaises(ValueError, v.plus_minus, u, True)
def test_propagate_linear(self):
v1, u1 = self.Q_(8.0, 's'), self.Q_(.7, 's')
v2, u2 = self.Q_(5.0, 's'), self.Q_(.6, 's')
v2, u3 = self.Q_(-5.0, 's'), self.Q_(.6, 's')
m1 = v1.plus_minus(u1)
m2 = v2.plus_minus(u2)
m3 = v2.plus_minus(u3)
for factor, m in zip((3, -3, 3, -3), (m1, m3, m1, m3)):
r = factor * m
self.assertAlmostEqual(r.value.magnitude, factor * m.value.magnitude)
self.assertAlmostEqual(r.error.magnitude, abs(factor * m.error.magnitude))
self.assertEqual(r.value.units, m.value.units)
for ml, mr in zip((m1, m1, m1, m3), (m1, m2, m3, m3)):
r = ml + mr
self.assertAlmostEqual(r.value.magnitude, ml.value.magnitude + mr.value.magnitude)
self.assertAlmostEqual(r.error.magnitude,
ml.error.magnitude + mr.error.magnitude if ml is mr else
(ml.error.magnitude ** 2 + mr.error.magnitude ** 2) ** .5)
self.assertEqual(r.value.units, ml.value.units)
for ml, mr in zip((m1, m1, m1, m3), (m1, m2, m3, m3)):
r = ml - mr
print(ml, mr, ml is mr, r)
self.assertAlmostEqual(r.value.magnitude, ml.value.magnitude - mr.value.magnitude)
self.assertAlmostEqual(r.error.magnitude,
0 if ml is mr else
(ml.error.magnitude ** 2 + mr.error.magnitude ** 2) ** .5)
self.assertEqual(r.value.units, ml.value.units)
def test_propagate_product(self):
v1, u1 = self.Q_(8.0, 's'), self.Q_(.7, 's')
v2, u2 = self.Q_(5.0, 's'), self.Q_(.6, 's')
v2, u3 = self.Q_(-5.0, 's'), self.Q_(.6, 's')
m1 = v1.plus_minus(u1)
m2 = v2.plus_minus(u2)
m3 = v2.plus_minus(u3)
m4 = (2.3 * self.ureg.meter).plus_minus(0.1)
m5 = (1.4 * self.ureg.meter).plus_minus(0.2)
for ml, mr in zip((m1, m1, m1, m3, m4), (m1, m2, m3, m3, m5)):
r = ml * mr
self.assertAlmostEqual(r.value.magnitude, ml.value.magnitude * mr.value.magnitude)
self.assertEqual(r.value.units, ml.value.units * mr.value.units)
for ml, mr in zip((m1, m1, m1, m3, m4), (m1, m2, m3, m3, m5)):
r = ml / mr
self.assertAlmostEqual(r.value.magnitude, ml.value.magnitude / mr.value.magnitude)
self.assertEqual(r.value.units, ml.value.units / mr.value.units)
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