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from __future__ import annotations
import pytest
from pint import DimensionalityError
from pint.testsuite import QuantityTestCase, helpers
# TODO: do not subclass from QuantityTestCase
@helpers.requires_not_uncertainties()
class TestNotMeasurement(QuantityTestCase):
def test_instantiate(self):
M_ = self.ureg.Measurement
with pytest.raises(RuntimeError):
M_(4.0, 0.1, "s")
# TODO: do not subclass from QuantityTestCase
@helpers.requires_uncertainties()
class TestMeasurement(QuantityTestCase):
def test_simple(self):
M_ = self.ureg.Measurement
m = M_(4.0, 0.1, "s * s")
assert repr(m) == "<Measurement(4.0, 0.1, second ** 2)>"
def test_build(self):
M_ = self.ureg.Measurement
v, u = self.Q_(4.0, "s"), self.Q_(0.1, "s")
M_(v.magnitude, u.magnitude, "s")
ms = (
M_(v.magnitude, u.magnitude, "s"),
M_(v, u.magnitude),
M_(v, u),
v.plus_minus(0.1),
v.plus_minus(0.025, True),
v.plus_minus(u),
)
for m in ms:
assert m.value == v
assert m.error == u
assert m.rel == m.error / abs(m.value)
@pytest.mark.parametrize(
"spec, expected",
[
("", "(4.00 +/- 0.10) second ** 2"),
("P", "(4.00 ± 0.10) second²"),
("L", r"\left(4.00 \pm 0.10\right)\ \mathrm{second}^{2}"),
("H", "(4.00 ± 0.10) second<sup>2</sup>"),
("C", "(4.00+/-0.10) second**2"),
("Lx", r"\SI{4.00 +- 0.10}{\second\squared}"),
(".1f", "(4.0 +/- 0.1) second ** 2"),
(".1fP", "(4.0 ± 0.1) second²"),
(".1fL", r"\left(4.0 \pm 0.1\right)\ \mathrm{second}^{2}"),
(".1fH", "(4.0 ± 0.1) second<sup>2</sup>"),
(".1fC", "(4.0+/-0.1) second**2"),
(".1fLx", r"\SI{4.0 +- 0.1}{\second\squared}"),
],
)
def test_format(self, func_registry, spec, expected):
Q_ = func_registry.Quantity
v, u = Q_(4.0, "s ** 2"), Q_(0.1, "s ** 2")
m = func_registry.Measurement(v, u)
assert format(m, spec) == expected
@pytest.mark.parametrize(
"spec, expected",
[
("uS", "0.200(10) second ** 2"),
(".3uS", "0.2000(100) second ** 2"),
(".3uSP", "0.2000(100) second²"),
(".3uSL", r"0.2000\left(100\right)\ \mathrm{second}^{2}"),
(".3uSH", "0.2000(100) second<sup>2</sup>"),
(".3uSC", "0.2000(100) second**2"),
],
)
def test_format_paru(self, func_registry, spec, expected):
Q_ = func_registry.Quantity
v, u = Q_(0.20, "s ** 2"), Q_(0.01, "s ** 2")
m = func_registry.Measurement(v, u)
assert format(m, spec) == expected
@pytest.mark.parametrize(
"spec, expected",
[
(".3u", "(0.2000 +/- 0.0100) second ** 2"),
(".3uP", "(0.2000 ± 0.0100) second²"),
(".3uL", r"\left(0.2000 \pm 0.0100\right)\ \mathrm{second}^{2}"),
(".3uH", "(0.2000 ± 0.0100) second<sup>2</sup>"),
(".3uC", "(0.2000+/-0.0100) second**2"),
(
".3uLx",
r"\SI{0.2000 +- 0.0100}{\second\squared}",
),
(".1uLx", r"\SI{0.20 +- 0.01}{\second\squared}"),
],
)
def test_format_u(self, func_registry, spec, expected):
Q_ = func_registry.Quantity
v, u = Q_(0.20, "s ** 2"), Q_(0.01, "s ** 2")
m = func_registry.Measurement(v, u)
assert format(m, spec) == expected
@pytest.mark.parametrize(
"spec, expected",
[
(".1u%", "(20 +/- 1)% second ** 2"),
(".1u%P", "(20 ± 1)% second²"),
(".1u%L", r"\left(20 \pm 1\right) \%\ \mathrm{second}^{2}"),
(".1u%H", "(20 ± 1)% second<sup>2</sup>"),
(".1u%C", "(20+/-1)% second**2"),
],
)
def test_format_percu(self, func_registry, spec, expected):
Q_ = func_registry.Quantity
v, u = Q_(0.20, "s ** 2"), Q_(0.01, "s ** 2")
m = func_registry.Measurement(v, u)
assert format(m, spec) == expected
@pytest.mark.parametrize(
"spec, expected",
[
(".1ue", "(2.0 +/- 0.1)e-01 second ** 2"),
(".1ueP", "(2.0 ± 0.1)×10⁻¹ second²"),
(
".1ueL",
r"\left(2.0 \pm 0.1\right) \times 10^{-1}\ \mathrm{second}^{2}",
),
(".1ueH", "(2.0 ± 0.1)×10<sup>-1</sup> second<sup>2</sup>"),
(".1ueC", "(2.0+/-0.1)e-01 second**2"),
],
)
def test_format_perce(self, func_registry, spec, expected):
Q_ = func_registry.Quantity
v, u = Q_(0.20, "s ** 2"), Q_(0.01, "s ** 2")
m = func_registry.Measurement(v, u)
assert format(m, spec) == expected
@pytest.mark.parametrize(
"spec, expected",
[
("", "(4.00 +/- 0.10)e+20 second ** 2"),
# ("!r", "<Measurement(4e+20, 1e+19, second ** 2)>"),
("P", "(4.00 ± 0.10)×10²⁰ second²"),
("L", r"\left(4.00 \pm 0.10\right) \times 10^{20}\ \mathrm{second}^{2}"),
("H", "(4.00 ± 0.10)×10<sup>20</sup> second<sup>2</sup>"),
("C", "(4.00+/-0.10)e+20 second**2"),
("Lx", r"\SI{4.00 +- 0.10 e+20}{\second\squared}"),
],
)
def test_format_exponential_pos(self, func_registry, spec, expected):
# Quantities in exponential format come with their own parenthesis, don't wrap
# them twice
m = func_registry.Quantity(4e20, "s^2").plus_minus(1e19)
assert format(m, spec) == expected
@pytest.mark.parametrize(
"spec, expected",
[
("", "(4.00 +/- 0.10)e-20 second ** 2"),
# ("!r", "<Measurement(4e-20, 1e-21, second ** 2)>"),
("P", "(4.00 ± 0.10)×10⁻²⁰ second²"),
(
"L",
r"\left(4.00 \pm 0.10\right) \times 10^{-20}\ \mathrm{second}^{2}",
),
("H", "(4.00 ± 0.10)×10<sup>-20</sup> second<sup>2</sup>"),
("C", "(4.00+/-0.10)e-20 second**2"),
("Lx", r"\SI{4.00 +- 0.10 e-20}{\second\squared}"),
],
)
def test_format_exponential_neg(self, func_registry, spec, expected):
m = func_registry.Quantity(4e-20, "s^2").plus_minus(1e-21)
assert format(m, spec) == expected
@pytest.mark.parametrize(
"spec, expected",
[
("", "(4.00 +/- 0.10) second ** 2"),
("P", "(4.00 ± 0.10) second²"),
("L", r"\left(4.00 \pm 0.10\right)\ \mathrm{second}^{2}"),
("H", "(4.00 ± 0.10) second<sup>2</sup>"),
("C", "(4.00+/-0.10) second**2"),
("Lx", r"\SI{4.00 +- 0.10}{\second\squared}"),
(".1f", "(4.0 +/- 0.1) second ** 2"),
(".1fP", "(4.0 ± 0.1) second²"),
(".1fL", r"\left(4.0 \pm 0.1\right)\ \mathrm{second}^{2}"),
(".1fH", "(4.0 ± 0.1) second<sup>2</sup>"),
(".1fC", "(4.0+/-0.1) second**2"),
(".1fLx", r"\SI{4.0 +- 0.1}{\second\squared}"),
],
)
def test_format_default(self, func_registry, spec, expected):
v, u = (
func_registry.Quantity(4.0, "s ** 2"),
func_registry.Quantity(0.1, "s ** 2"),
)
m = func_registry.Measurement(v, u)
func_registry.default_format = spec
assert f"{m}" == expected
def test_raise_build(self):
v, u = self.Q_(1.0, "s"), self.Q_(0.1, "s")
o = self.Q_(0.1, "m")
M_ = self.ureg.Measurement
with pytest.raises(DimensionalityError):
M_(v, o)
with pytest.raises(DimensionalityError):
v.plus_minus(o)
with pytest.raises(ValueError):
v.plus_minus(u, relative=True)
def test_propagate_linear(self):
v1, u1 = self.Q_(8.0, "s"), self.Q_(0.7, "s")
v2, u2 = self.Q_(5.0, "s"), self.Q_(0.6, "s")
v2, u3 = self.Q_(-5.0, "s"), self.Q_(0.6, "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
helpers.assert_quantity_almost_equal(
r.value.magnitude, factor * m.value.magnitude
)
helpers.assert_quantity_almost_equal(
r.error.magnitude, abs(factor * m.error.magnitude)
)
assert r.value.units == m.value.units
for ml, mr in zip((m1, m1, m1, m3), (m1, m2, m3, m3)):
r = ml + mr
helpers.assert_quantity_almost_equal(
r.value.magnitude, ml.value.magnitude + mr.value.magnitude
)
helpers.assert_quantity_almost_equal(
r.error.magnitude,
(
ml.error.magnitude + mr.error.magnitude
if ml is mr
else (ml.error.magnitude**2 + mr.error.magnitude**2) ** 0.5
),
)
assert r.value.units == ml.value.units
for ml, mr in zip((m1, m1, m1, m3), (m1, m2, m3, m3)):
r = ml - mr
helpers.assert_quantity_almost_equal(
r.value.magnitude, ml.value.magnitude - mr.value.magnitude
)
helpers.assert_quantity_almost_equal(
r.error.magnitude,
0
if ml is mr
else (ml.error.magnitude**2 + mr.error.magnitude**2) ** 0.5,
)
assert r.value.units == ml.value.units
def test_propagate_product(self):
v1, u1 = self.Q_(8.0, "s"), self.Q_(0.7, "s")
v2, u2 = self.Q_(5.0, "s"), self.Q_(0.6, "s")
v2, u3 = self.Q_(-5.0, "s"), self.Q_(0.6, "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
helpers.assert_quantity_almost_equal(
r.value.magnitude, ml.value.magnitude * mr.value.magnitude
)
assert 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
helpers.assert_quantity_almost_equal(
r.value.magnitude, ml.value.magnitude / mr.value.magnitude
)
assert r.value.units == ml.value.units / mr.value.units
def test_measurement_comparison(self):
x = self.Q_(4.2, "meter")
y = self.Q_(5.0, "meter").plus_minus(0.1)
assert x <= y
assert not (x >= y)
def test_tokenization(self):
from pint import pint_eval
pint_eval.tokenizer = pint_eval.uncertainty_tokenizer
for p in pint_eval.tokenizer("8 + / - 4"):
print(p)
assert True
|
