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# Copyright (c) 2019-2025, Saransh Chopra, Henry Schreiner, Eduardo Rodrigues, Jonas Eschle, and Jim Pivarski.
#
# Distributed under the 3-clause BSD license, see accompanying file LICENSE
# or https://github.com/scikit-hep/vector for details.
from __future__ import annotations
import pytest
import vector
import vector._methods
sympy = pytest.importorskip("sympy")
pytestmark = pytest.mark.sympy
x, y, z, time = sympy.symbols("x y z time", real=True)
values = {x: 0.1, y: 0.2, z: 0.3}
def test_spatial_sympy():
vec = vector.VectorSympy3D(
azimuthal=vector.backends.sympy.AzimuthalSympyXY(x, y),
longitudinal=vector.backends.sympy.LongitudinalSympyZ(z),
)
out = vec.rotateX(0.25)
assert isinstance(out.azimuthal, vector._methods.AzimuthalXY)
assert isinstance(out.longitudinal, vector._methods.LongitudinalZ)
assert out.x == x
# cannot equate the sympy expressions because of floating point errors
assert out.y.subs(values) == pytest.approx(0.1195612965657721)
assert out.z.subs(values) == pytest.approx(0.340154518364098)
for t in "xyz", "xytheta", "xyeta", "rhophiz", "rhophitheta", "rhophieta":
out = getattr(vec, "to_" + t)().rotateX(0.25)
assert isinstance(out.azimuthal, vector._methods.AzimuthalXY)
assert isinstance(out.longitudinal, vector._methods.LongitudinalZ)
assert out.x.subs(values) == pytest.approx(0.1)
assert out.y.subs(values) == pytest.approx(0.1195612965657721)
assert out.z.subs(values) == pytest.approx(0.340154518364098)
def test_lorentz_sympy():
vec = vector.VectorSympy4D(
azimuthal=vector.backends.sympy.AzimuthalSympyXY(x, y),
longitudinal=vector.backends.sympy.LongitudinalSympyZ(z),
temporal=vector.backends.sympy.TemporalSympyT(time),
)
out = vec.rotateX(0.25)
assert isinstance(out.azimuthal, vector._methods.AzimuthalXY)
assert isinstance(out.longitudinal, vector._methods.LongitudinalZ)
assert hasattr(out, "temporal")
assert out.x == x
# cannot equate the sympy expressions because of floating point errors
assert out.y.subs(values) == pytest.approx(0.1195612965657721)
assert out.z.subs(values) == pytest.approx(0.340154518364098)
for t in (
"xyzt",
"xythetat",
"xyetat",
"rhophizt",
"rhophithetat",
"rhophietat",
"xyztau",
"xythetatau",
"xyetatau",
"rhophiztau",
"rhophithetatau",
"rhophietatau",
):
out = getattr(vec, "to_" + t)().rotateX(0.25)
assert isinstance(out.azimuthal, vector._methods.AzimuthalXY)
assert isinstance(out.longitudinal, vector._methods.LongitudinalZ)
assert hasattr(out, "temporal")
assert out.x.subs(values) == pytest.approx(0.1)
assert out.y.subs(values) == pytest.approx(0.1195612965657721)
assert out.z.subs(values) == pytest.approx(0.340154518364098)
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