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Adds core tests #860

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120 changes: 119 additions & 1 deletion tests/test_core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,17 @@

import numpy as np

from magpylib._src.fields.field_BH_sphere import magnet_sphere_Bfield
from magpylib.core import (
current_circle_Hfield,
current_polyline_Hfield,
dipole_Hfield,
magnet_cuboid_Bfield,
magnet_cylinder_axial_Bfield,
magnet_cylinder_diametral_Hfield,
magnet_cylinder_segment_Hfield,
magnet_sphere_Bfield,
triangle_Bfield,
)


def test_magnet_sphere_Bfield():
Expand All @@ -15,3 +25,111 @@ def test_magnet_sphere_Bfield():
)
Btest = np.array([(0, 0, 2 / 3)])
np.testing.assert_allclose(B, Btest)


def test_current_circle_Hfield():
Htest = np.array([[0.09098208, 0.09415448], [0.0, 0.0], [0.07677892, 0.22625335]])
H = current_circle_Hfield(
r0=np.array([1, 2]),
r=np.array([1, 1]),
z=np.array([1, 2]),
i0=np.array([1, 3]),
)
np.testing.assert_allclose(H, Htest)


def test_current_polyline_Hfield():
Htest = np.array([[0.0, -2.29720373, 2.29720373], [0.0, 0.59785204, -0.59785204]])

H = current_polyline_Hfield(
observers=np.array([(1, 1, 1), (2, 2, 2)]),
segments_start=np.array([(0, 0, 0), (0, 0, 0)]),
segments_end=np.array([(1, 0, 0), (-1, 0, 0)]),
currents=np.array([100, 200]),
)
np.testing.assert_allclose(H, Htest)


def test_dipole_Hfield():
Htest = np.array(
[
[2.89501155e-13, 1.53146915e03, 1.53146915e03],
[1.91433644e02, 1.91433644e02, 3.61876444e-14],
]
)
H = dipole_Hfield(
observers=np.array([(1, 1, 1), (2, 2, 2)]),
moments=np.array([(1e5, 0, 0), (0, 0, 1e5)]),
)
np.testing.assert_allclose(H, Htest)


def test_magnet_cuboid_Bfield():
Btest = np.array(
[
[1.56103722e-02, 1.56103722e-02, -3.53394965e-17],
[7.73243250e-03, 6.54431406e-03, 1.04789520e-02],
]
)
B = magnet_cuboid_Bfield(
observers=np.array([(1, 1, 1), (2, 2, 2)]),
dimensions=np.array([(1, 1, 1), (1, 2, 3)]),
polarizations=np.array([(0, 0, 1), (0.5, 0.5, 0)]),
)
np.testing.assert_allclose(B, Btest)


def test_magnet_cylinder_axial_Bfield():
Btest = np.array([[0.05561469, 0.04117919], [0.0, 0.0], [0.06690167, 0.01805674]])
B = magnet_cylinder_axial_Bfield(
z0=np.array([1, 2]),
r=np.array([1, 2]),
z=np.array([2, 3]),
)
np.testing.assert_allclose(B, Btest)


def test_magnet_cylinder_diametral_Hfield():
Btest = np.array(
[
[-0.020742122169014, 0.007307203574376],
[0.004597868528024, 0.020075245863212],
[0.05533684822464, 0.029118084290573],
],
)
B = magnet_cylinder_diametral_Hfield(
z0=np.array([1, 2]),
r=np.array([1, 2]),
z=np.array([2, 3]),
phi=np.array([0.1, np.pi / 4]),
)
np.testing.assert_allclose(B, Btest)


def test_magnet_cylinder_segment_Hfield():
Btest = np.array(
[
[-1948.14367497, 32319.94437208, 17616.88571231],
[14167.64961763, 1419.94126065, 17921.6463117],
]
)
B = magnet_cylinder_segment_Hfield(
observers=np.array([(1, 1, 2), (0, 0, 0)]),
dimensions=np.array([(1, 2, 0.1, 0.2, -1, 1), (1, 2, 0.3, 0.9, 0, 1)]),
magnetizations=np.array([(1e7, 0.1, 0.2), (1e6, 1.1, 2.2)]),
)
np.testing.assert_allclose(B, Btest)


def test_triangle_Bfield():
Btest = np.array(
[[7.45158965, 4.61994866, 3.13614132], [2.21345618, 2.67710148, 2.21345618]]
)
B = triangle_Bfield(
observers=np.array([(2, 1, 1), (2, 2, 2)]),
vertices=np.array(
[[(0, 0, 0), (0, 0, 1), (1, 0, 0)], [(0, 0, 0), (0, 0, 1), (1, 0, 0)]]
),
polarizations=np.array([(1, 1, 1), (1, 1, 0)]) * 1e3,
)
np.testing.assert_allclose(B, Btest)