/
test_hpx.py
735 lines (629 loc) · 22.9 KB
/
test_hpx.py
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# Licensed under a 3-clause BSD style license - see LICENSE.rst
from __future__ import absolute_import, division, print_function, unicode_literals
import pytest
import numpy as np
from numpy.testing import assert_allclose
from astropy.io import fits
from ..geom import MapAxis, MapCoord
from ..hpx import HpxGeom, get_pix_size_from_nside, nside_to_order
from ..hpx import make_hpx_to_wcs_mapping, unravel_hpx_index, ravel_hpx_index
from ..hpx import get_hpxregion_dir, get_hpxregion_size, get_subpixels, get_superpixels
pytest.importorskip("scipy")
pytest.importorskip("healpy")
pytest.importorskip("numpy", "1.13.0")
hpx_allsky_test_geoms = [
# 2D All-sky
(8, False, "GAL", None, None),
# 3D All-sky
(8, False, "GAL", None, [MapAxis(np.logspace(0., 3., 4))]),
# 3D All-sky w/ variable pixel size
([2, 4, 8], False, "GAL", None, [MapAxis(np.logspace(0., 3., 4))]),
# 4D All-sky
(
8,
False,
"GAL",
None,
[
MapAxis(np.logspace(0., 3., 3), name="axis0"),
MapAxis(np.logspace(0., 2., 4), name="axis1"),
],
),
]
hpx_partialsky_test_geoms = [
# 2D Partial-sky
(8, False, "GAL", "DISK(110.,75.,10.)", None),
# 3D Partial-sky
(8, False, "GAL", "DISK(110.,75.,10.)", [MapAxis(np.logspace(0., 3., 4))]),
# 3D Partial-sky w/ variable pixel size
(
[8, 16, 32],
False,
"GAL",
"DISK(110.,75.,10.)",
[MapAxis(np.logspace(0., 3., 4))],
),
# 4D Partial-sky w/ variable pixel size
(
[[8, 16, 32], [8, 8, 16]],
False,
"GAL",
"DISK(110.,75.,10.)",
[
MapAxis(np.logspace(0., 3., 3), name="axis0"),
MapAxis(np.logspace(0., 2., 4), name="axis1"),
],
),
]
hpx_test_geoms = hpx_allsky_test_geoms + hpx_partialsky_test_geoms
def make_test_coords(geom, lon, lat):
coords = [lon, lat] + [ax.center for ax in geom.axes]
coords = np.meshgrid(*coords)
coords = tuple([np.ravel(t) for t in coords])
return MapCoord.create(coords)
def test_unravel_hpx_index():
npix = np.array([2, 7])
assert_allclose(
unravel_hpx_index(np.array([0, 4]), npix), (np.array([0, 2]), np.array([0, 1]))
)
npix = np.array([[2, 7], [3, 1]])
assert_allclose(
unravel_hpx_index(np.array([0, 3, 10]), npix),
(np.array([0, 1, 1]), np.array([0, 0, 1]), np.array([0, 1, 0])),
)
def test_ravel_hpx_index():
npix = np.array([2, 7])
idx = (np.array([0, 2]), np.array([0, 1]))
assert_allclose(ravel_hpx_index(idx, npix), np.array([0, 4]))
npix = np.array([[2, 7], [3, 1]])
idx = (np.array([0, 1, 1]), np.array([0, 0, 1]), np.array([0, 1, 0]))
assert_allclose(ravel_hpx_index(idx, npix), np.array([0, 3, 10]))
def make_test_nside(nside, nside0, nside1):
npix = 12 * nside ** 2
nside_test = np.concatenate(
(nside0 * np.ones(npix // 2, dtype=int), nside1 * np.ones(npix // 2, dtype=int))
)
return nside_test
@pytest.mark.parametrize(
("nside_subpix", "nside_superpix", "nest"),
[
(4, 2, True),
(8, 2, True),
(8, make_test_nside(8, 4, 2), True),
(4, 2, False),
(8, 2, False),
(8, make_test_nside(8, 4, 2), False),
],
)
def test_get_superpixels(nside_subpix, nside_superpix, nest):
import healpy as hp
npix = 12 * nside_subpix ** 2
subpix = np.arange(npix)
ang_subpix = hp.pix2ang(nside_subpix, subpix, nest=nest)
superpix = get_superpixels(subpix, nside_subpix, nside_superpix, nest=nest)
pix1 = hp.ang2pix(nside_superpix, *ang_subpix, nest=nest)
assert_allclose(superpix, pix1)
subpix = subpix.reshape((12, -1))
if not np.isscalar(nside_subpix):
nside_subpix = nside_subpix.reshape((12, -1))
if not np.isscalar(nside_superpix):
nside_superpix = nside_superpix.reshape((12, -1))
ang_subpix = hp.pix2ang(nside_subpix, subpix, nest=nest)
superpix = get_superpixels(subpix, nside_subpix, nside_superpix, nest=nest)
pix1 = hp.ang2pix(nside_superpix, *ang_subpix, nest=nest)
assert_allclose(superpix, pix1)
@pytest.mark.parametrize(
("nside_superpix", "nside_subpix", "nest"),
[(2, 4, True), (2, 8, True), (2, 4, False), (2, 8, False)],
)
def test_get_subpixels(nside_superpix, nside_subpix, nest):
import healpy as hp
npix = 12 * nside_superpix ** 2
superpix = np.arange(npix)
subpix = get_subpixels(superpix, nside_superpix, nside_subpix, nest=nest)
ang1 = hp.pix2ang(nside_subpix, subpix, nest=nest)
pix1 = hp.ang2pix(nside_superpix, *ang1, nest=nest)
assert np.all(superpix[..., None] == pix1)
superpix = superpix.reshape((12, -1))
subpix = get_subpixels(superpix, nside_superpix, nside_subpix, nest=nest)
ang1 = hp.pix2ang(nside_subpix, subpix, nest=nest)
pix1 = hp.ang2pix(nside_superpix, *ang1, nest=nest)
assert np.all(superpix[..., None] == pix1)
pix1 = get_superpixels(subpix, nside_subpix, nside_superpix, nest=nest)
assert np.all(superpix[..., None] == pix1)
def test_hpx_global_to_local():
ax0 = np.linspace(0., 1., 3)
ax1 = np.linspace(0., 1., 3)
# 2D All-sky
hpx = HpxGeom(16, False, "GAL")
assert_allclose(hpx[0], np.array([0]))
assert_allclose(hpx[633], np.array([633]))
assert_allclose(hpx[0, 633], np.array([0, 633]))
assert_allclose(hpx[np.array([0, 633])], np.array([0, 633]))
# 3D All-sky
hpx = HpxGeom(16, False, "GAL", axes=[ax0])
assert_allclose(
hpx[(np.array([177, 177]), np.array([0, 1]))], np.array([177, 177 + 3072])
)
# 2D Partial-sky
hpx = HpxGeom(64, False, "GAL", region="DISK(110.,75.,2.)")
assert_allclose(hpx[0, 633, 706], np.array([-1, 0, 2]))
# 3D Partial-sky
hpx = HpxGeom(64, False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0])
assert_allclose(hpx[633], np.array([0]))
assert_allclose(hpx[49859], np.array([19]))
assert_allclose(hpx[0, 633, 706, 49859, 49935], np.array([-1, 0, 2, 19, 21]))
assert_allclose(
hpx[np.array([0, 633, 706, 49859, 49935])], np.array([-1, 0, 2, 19, 21])
)
assert_allclose(
hpx[(np.array([0, 633, 706, 707, 783]), np.array([0, 0, 0, 1, 1]))],
np.array([-1, 0, 2, 19, 21]),
)
# 3D Partial-sky w/ variable bin size
hpx = HpxGeom([32, 64], False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0])
assert_allclose(hpx[191], np.array([0]))
assert_allclose(hpx[12995], np.array([6]))
assert_allclose(hpx[0, 191, 233, 12995], np.array([-1, 0, 2, 6]))
assert_allclose(
hpx[(np.array([0, 191, 233, 707]), np.array([0, 0, 0, 1]))],
np.array([-1, 0, 2, 6]),
)
# 4D Partial-sky w/ variable bin size
hpx = HpxGeom(
[[16, 32], [32, 64]], False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0, ax1]
)
assert_allclose(hpx[3263], np.array([1]))
assert_allclose(hpx[28356], np.array([11]))
assert_allclose(hpx[(np.array([46]), np.array([0]), np.array([0]))], np.array([0]))
@pytest.mark.parametrize(
("nside", "nested", "coordsys", "region", "axes"), hpx_allsky_test_geoms
)
def test_hpxgeom_init_with_pix(nside, nested, coordsys, region, axes):
geom = HpxGeom(nside, nested, coordsys, region=region, axes=axes)
idx0 = geom.get_idx(flat=True)
idx1 = tuple([t[::10] for t in idx0])
geom = HpxGeom(nside, nested, coordsys, region=idx0, axes=axes)
assert_allclose(idx0, geom.get_idx(flat=True))
assert_allclose(len(idx0[0]), np.sum(geom.npix))
geom = HpxGeom(nside, nested, coordsys, region=idx1, axes=axes)
assert_allclose(idx1, geom.get_idx(flat=True))
assert_allclose(len(idx1[0]), np.sum(geom.npix))
@pytest.mark.parametrize(
("nside", "nested", "coordsys", "region", "axes"), hpx_test_geoms
)
def test_hpxgeom_to_slice(nside, nested, coordsys, region, axes):
geom = HpxGeom(nside, nested, coordsys, region=region, axes=axes)
slices = tuple([slice(1, 2) for i in range(2, geom.ndim)])
geom_slice = geom.to_slice(slices)
assert_allclose(geom_slice.ndim, 2)
assert_allclose(geom_slice.npix, np.squeeze(geom.npix[slices]))
idx = geom.get_idx(flat=True)
idx_slice = geom_slice.get_idx(flat=True)
if geom.ndim > 2:
m = np.all([np.in1d(t, [1]) for t in idx[1:]], axis=0)
assert_allclose(idx_slice, (idx[0][m],))
else:
assert_allclose(idx_slice, idx)
# Test slicing with explicit geometry
geom = HpxGeom(
nside, nested, coordsys, region=tuple([t[::3] for t in idx]), axes=axes
)
geom_slice = geom.to_slice(slices)
assert_allclose(geom_slice.ndim, 2)
assert_allclose(geom_slice.npix, np.squeeze(geom.npix[slices]))
idx = geom.get_idx()
idx_slice = geom_slice.get_idx()
if geom.ndim > 2:
m = np.all([np.in1d(t, [1]) for t in idx[1:]], axis=0)
assert_allclose(idx_slice, (idx[0].flat[m],))
else:
assert_allclose(idx_slice, idx)
@pytest.mark.parametrize(
("nside", "nested", "coordsys", "region", "axes"), hpx_test_geoms
)
def test_hpxgeom_get_pix(nside, nested, coordsys, region, axes):
geom = HpxGeom(nside, nested, coordsys, region=region, axes=axes)
idx = geom.get_idx(local=False, flat=True)
idx_local = geom.get_idx(local=True, flat=True)
assert_allclose(idx, geom.local_to_global(idx_local))
if axes is not None:
idx_img = geom.get_idx(local=False, idx=tuple([1] * len(axes)), flat=True)
idx_img_local = geom.get_idx(local=True, idx=tuple([1] * len(axes)), flat=True)
assert_allclose(idx_img, geom.local_to_global(idx_img_local))
@pytest.mark.parametrize(
("nside", "nested", "coordsys", "region", "axes"), hpx_test_geoms
)
def test_hpxgeom_coord_to_idx(nside, nested, coordsys, region, axes):
import healpy as hp
geom = HpxGeom(nside, nested, coordsys, region=region, axes=axes)
lon = np.array([112.5, 135., 105.])
lat = np.array([75.3, 75.3, 74.6])
coords = make_test_coords(geom, lon, lat)
zidx = tuple([ax.coord_to_idx(t) for t, ax in zip(coords[2:], geom.axes)])
if geom.nside.size > 1:
nside = geom.nside[zidx]
else:
nside = geom.nside
phi, theta = coords.phi, coords.theta
idx = geom.coord_to_idx(coords)
assert_allclose(hp.ang2pix(nside, theta, phi), idx[0])
for i, z in enumerate(zidx):
assert_allclose(z, idx[i + 1])
# Test w/ coords outside the geometry
lon = np.array([0.0, 5.0, 10.0])
lat = np.array([75.3, 75.3, 74.6])
coords = make_test_coords(geom, lon, lat)
zidx = [ax.coord_to_idx(t) for t, ax in zip(coords[2:], geom.axes)]
idx = geom.coord_to_idx(coords)
if geom.region is not None:
assert_allclose(np.full_like(coords[0], -1, dtype=int), idx[0])
idx = geom.coord_to_idx(coords, clip=True)
assert np.all(np.not_equal(np.full_like(coords[0], -1, dtype=int), idx[0]))
def test_hpxgeom_coord_to_pix():
lon = np.array([110.25, 114., 105.])
lat = np.array([75.3, 75.3, 74.6])
z0 = np.array([0.5, 1.5, 2.5])
z1 = np.array([3.5, 4.5, 5.5])
ax0 = np.linspace(0., 3., 4)
ax1 = np.linspace(3., 6., 4)
pix64 = np.array([784, 785, 864])
# 2D all-sky
coords = (lon, lat)
hpx = HpxGeom(64, False, "GAL")
assert_allclose(hpx.coord_to_pix(coords)[0], pix64)
# 2D partial-sky
coords = (lon, lat)
hpx = HpxGeom(64, False, "GAL", region="DISK(110.,75.,2.)")
assert_allclose(hpx.coord_to_pix(coords)[0], pix64)
# 3D partial-sky
coords = (lon, lat, z0)
hpx = HpxGeom(64, False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0])
assert_allclose(hpx.coord_to_pix(coords), (pix64, np.array([0, 1, 2])))
# 3D partial-sky w/ variable bin size
coords = (lon, lat, z0)
nside = [16, 32, 64]
hpx_bins = [HpxGeom(n, False, "GAL", region="DISK(110.,75.,2.)") for n in nside]
hpx = HpxGeom(nside, False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0])
for i, (x, y, z) in enumerate(np.vstack(coords).T):
pix0 = hpx.coord_to_pix((np.array([x]), np.array([y]), np.array([z])))
pix1 = hpx_bins[i].coord_to_pix((np.array([x]), np.array([y])))
assert_allclose(pix0[0], pix1[0])
# 4D partial-sky
coords = (lon, lat, z0, z1)
hpx = HpxGeom(64, False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0, ax1])
assert_allclose(
hpx.coord_to_pix(coords), (pix64, np.array([0, 1, 2]), np.array([0, 1, 2]))
)
def test_hpx_nside_to_order():
assert_allclose(nside_to_order(64), np.array([6]))
assert_allclose(
nside_to_order(np.array([10, 32, 42, 64, 128, 256])),
np.array([-1, 5, -1, 6, 7, 8]),
)
order = np.linspace(1, 10, 10).astype(int)
nside = 2 ** order
assert_allclose(nside_to_order(nside), order)
assert_allclose(nside_to_order(nside).reshape((2, 5)), order.reshape((2, 5)))
def test_hpx_get_pix_size_from_nside():
assert_allclose(
get_pix_size_from_nside(np.array([1, 2, 4])), np.array([32.0, 16.0, 8.0])
)
def test_hpx_get_hpxregion_size():
assert_allclose(get_hpxregion_size("DISK(110.,75.,2.)"), 2.0)
def test_hpxgeom_get_hpxregion_dir():
refdir = get_hpxregion_dir("DISK(110.,75.,2.)", "GAL")
assert_allclose(refdir.l.deg, 110.)
assert_allclose(refdir.b.deg, 75.)
refdir = get_hpxregion_dir(None, "GAL")
assert_allclose(refdir.l.deg, 0.)
assert_allclose(refdir.b.deg, 0.)
def test_hpxgeom_make_wcs():
ax0 = np.linspace(0., 3., 4)
hpx = HpxGeom(64, False, "GAL", region="DISK(110.,75.,2.)")
wcs = hpx.make_wcs()
assert_allclose(wcs.wcs.wcs.crval, np.array([110., 75.]))
hpx = HpxGeom(64, False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0])
wcs = hpx.make_wcs()
assert_allclose(wcs.wcs.wcs.crval, np.array([110., 75.]))
def test_hpxgeom_get_coord():
ax0 = np.linspace(0., 3., 4)
# 2D all-sky
hpx = HpxGeom(16, False, "GAL")
c = hpx.get_coord()
assert_allclose(c[0][:3], np.array([45., 135., 225.]))
assert_allclose(c[1][:3], np.array([87.075819, 87.075819, 87.075819]))
# 3D all-sky
hpx = HpxGeom(16, False, "GAL", axes=[ax0])
c = hpx.get_coord()
assert_allclose(c[0][0, :3], np.array([45., 135., 225.]))
assert_allclose(c[1][0, :3], np.array([87.075819, 87.075819, 87.075819]))
assert_allclose(c[2][0, :3], np.array([0.5, 0.5, 0.5]))
# 2D partial-sky
hpx = HpxGeom(64, False, "GAL", region="DISK(110.,75.,2.)")
c = hpx.get_coord()
assert_allclose(c[0][:3], np.array([107.5, 112.5, 106.57894737]))
assert_allclose(c[1][:3], np.array([76.813533, 76.813533, 76.07742]))
# 3D partial-sky
hpx = HpxGeom(64, False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0])
c = hpx.get_coord()
assert_allclose(c[0][0, :3], np.array([107.5, 112.5, 106.57894737]))
assert_allclose(c[1][0, :3], np.array([76.813533, 76.813533, 76.07742]))
assert_allclose(c[2][0, :3], np.array([0.5, 0.5, 0.5]))
# 3D partial-sky w/ variable bin size
hpx = HpxGeom([16, 32, 64], False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0])
c = hpx.get_coord(flat=True)
assert_allclose(c[0][:3], np.array([117., 103.5, 112.5]))
assert_allclose(c[1][:3], np.array([75.340734, 75.340734, 75.340734]))
assert_allclose(c[2][:3], np.array([0.5, 1.5, 1.5]))
@pytest.mark.parametrize(
("nside", "nested", "coordsys", "region", "axes"), hpx_test_geoms
)
def test_hpxgeom_contains(nside, nested, coordsys, region, axes):
geom = HpxGeom(nside, nested, coordsys, region=region, axes=axes)
coords = geom.get_coord(flat=True)
assert_allclose(geom.contains(coords), np.ones_like(coords[0], dtype=bool))
if axes is not None:
coords = [c[0] for c in coords[:2]] + [ax.edges[-1] + 1.0 for ax in axes]
assert_allclose(geom.contains(coords), np.zeros((1,), dtype=bool))
if geom.region is not None:
coords = [0.0, 0.0] + [ax.center[0] for ax in geom.axes]
assert_allclose(geom.contains(coords), np.zeros((1,), dtype=bool))
def test_make_hpx_to_wcs_mapping():
ax0 = np.linspace(0., 1., 3)
hpx = HpxGeom(16, False, "GAL", region="DISK(110.,75.,2.)")
# FIXME construct explicit WCS projection here
wcs = hpx.make_wcs()
hpx2wcs = make_hpx_to_wcs_mapping(hpx, wcs)
assert_allclose(
hpx2wcs[0],
np.array(
[
67,
46,
46,
46,
46,
29,
67,
67,
46,
46,
46,
46,
67,
67,
67,
46,
46,
46,
67,
67,
67,
28,
28,
28,
45,
45,
45,
45,
28,
28,
66,
45,
45,
45,
45,
28,
]
),
)
assert_allclose(
hpx2wcs[1],
np.array(
[
0.11111111,
0.09090909,
0.09090909,
0.09090909,
0.09090909,
1.,
0.11111111,
0.11111111,
0.09090909,
0.09090909,
0.09090909,
0.09090909,
0.11111111,
0.11111111,
0.11111111,
0.09090909,
0.09090909,
0.09090909,
0.11111111,
0.11111111,
0.11111111,
0.16666667,
0.16666667,
0.16666667,
0.125,
0.125,
0.125,
0.125,
0.16666667,
0.16666667,
1.,
0.125,
0.125,
0.125,
0.125,
0.16666667,
]
),
)
hpx = HpxGeom([8, 16], False, "GAL", region="DISK(110.,75.,2.)", axes=[ax0])
hpx2wcs = make_hpx_to_wcs_mapping(hpx, wcs)
assert_allclose(
hpx2wcs[0],
np.array(
[
[
15,
6,
6,
6,
6,
6,
15,
15,
6,
6,
6,
6,
15,
15,
15,
6,
6,
6,
15,
15,
15,
6,
6,
6,
15,
15,
15,
15,
6,
6,
15,
15,
15,
15,
15,
6,
],
[
67,
46,
46,
46,
46,
29,
67,
67,
46,
46,
46,
46,
67,
67,
67,
46,
46,
46,
67,
67,
67,
28,
28,
28,
45,
45,
45,
45,
28,
28,
66,
45,
45,
45,
45,
28,
],
]
),
)
def test_hpxgeom_from_header():
pars = {
"HPX_REG": "DISK(110.,75.,2.)",
"EXTNAME": "SKYMAP",
"NSIDE": 2 ** 6,
"ORDER": 6,
"PIXTYPE": "HEALPIX",
"ORDERING": "RING",
"COORDSYS": "CEL",
"TTYPE1": "PIX",
"TFORM1": "K",
"TTYPE2": "CHANNEL1",
"TFORM2": "D",
"INDXSCHM": "EXPLICIT",
}
header = fits.Header()
header.update(pars)
hpx = HpxGeom.from_header(header)
assert hpx.coordsys == pars["COORDSYS"]
assert hpx.nest is False
assert_allclose(hpx.nside, np.array([64]))
@pytest.mark.parametrize(
("nside", "nested", "coordsys", "region", "axes"), hpx_test_geoms
)
def test_hpxgeom_read_write(tmpdir, nside, nested, coordsys, region, axes):
geom0 = HpxGeom(nside, nested, coordsys, region=region, axes=axes)
hdu_bands = geom0.make_bands_hdu(hdu="BANDS")
hdu_prim = fits.PrimaryHDU()
hdu_prim.header.update(geom0.make_header())
filename = str(tmpdir / "hpxgeom.fits")
hdulist = fits.HDUList([hdu_prim, hdu_bands])
hdulist.writeto(filename, overwrite=True)
hdulist = fits.open(filename)
geom1 = HpxGeom.from_header(hdulist[0].header, hdulist["BANDS"])
assert_allclose(geom0.nside, geom1.nside)
assert_allclose(geom0.npix, geom1.npix)
assert_allclose(geom0.nest, geom1.nest)
assert geom0.coordsys == geom1.coordsys
@pytest.mark.parametrize(
("nside", "nested", "coordsys", "region", "axes"), hpx_test_geoms
)
def test_hpxgeom_upsample(nside, nested, coordsys, region, axes):
# NESTED
geom = HpxGeom(nside, True, coordsys, region=region, axes=axes)
geom_up = geom.upsample(2)
assert_allclose(2 * geom.nside, geom_up.nside)
assert_allclose(4 * geom.npix, geom_up.npix)
coords = geom_up.get_coord(flat=True)
assert np.all(geom.contains(coords))
# RING
geom = HpxGeom(nside, False, coordsys, region=region, axes=axes)
geom_up = geom.upsample(2)
assert_allclose(2 * geom.nside, geom_up.nside)
assert_allclose(4 * geom.npix, geom_up.npix)
coords = geom_up.get_coord(flat=True)
assert np.all(geom.contains(coords))
@pytest.mark.parametrize(
("nside", "nested", "coordsys", "region", "axes"), hpx_test_geoms
)
def test_hpxgeom_downsample(nside, nested, coordsys, region, axes):
# NESTED
geom = HpxGeom(nside, True, coordsys, region=region, axes=axes)
geom_down = geom.downsample(2)
assert_allclose(geom.nside, 2 * geom_down.nside)
coords = geom.get_coord(flat=True)
assert np.all(geom_down.contains(coords))
# RING
geom = HpxGeom(nside, False, coordsys, region=region, axes=axes)
geom_down = geom.downsample(2)
assert_allclose(geom.nside, 2 * geom_down.nside)
coords = geom.get_coord(flat=True)
assert np.all(geom_down.contains(coords))
def test_hpxgeom_solid_angle():
geom = HpxGeom.create(nside=8, coordsys="GAL", axes=[MapAxis.from_edges([0, 2, 3])])
solid_angle = geom.solid_angle()
assert solid_angle.shape == (1,)
assert_allclose(solid_angle.value, 0.016362461737446838)
def test_geom_repr():
geom = HpxGeom(nside=8)
assert geom.__class__.__name__ in repr(geom)
assert "nside" in repr(geom)