def test_extra_coords_index(skycoord_2d_lut, time_lut):
ec = ExtraCoords()
ec.add_coordinate(("lat", "lon"), (0, 1), skycoord_2d_lut, mesh=False)
ec.add_coordinate("exposure_time", (0, ), time_lut)
assert len(ec._lookup_tables) == 2
assert ec.mapping == (0, 1, 0)
assert isinstance(ec.wcs, gwcs.WCS)
assert ec.wcs.pixel_n_dim == 3
assert ec.wcs.world_n_dim == 3
assert ec.wcs.world_axis_names == ("lat", "lon", "exposure_time")
sub_ec = ec["lon"]
assert len(sub_ec._lookup_tables) == 1
assert sub_ec.mapping == (0, 1)
assert isinstance(ec.wcs, gwcs.WCS)
assert sub_ec.wcs.pixel_n_dim == 2
assert sub_ec.wcs.world_n_dim == 2
assert sub_ec.wcs.world_axis_names == ("lat", "lon")
sub_ec = ec["exposure_time"]
assert len(sub_ec._lookup_tables) == 1
assert sub_ec.mapping == (0, )
assert isinstance(ec.wcs, gwcs.WCS)
assert sub_ec.wcs.pixel_n_dim == 1
assert sub_ec.wcs.world_n_dim == 1
assert sub_ec.wcs.world_axis_names == ("exposure_time", )
def test_slice_drop_dimensions(time_lut, skycoord_2d_lut):
ec = ExtraCoords()
ec.add_coordinate(("lat", "lon"), (0, 1), skycoord_2d_lut, mesh=False)
ec.add_coordinate("exposure_time", (0, ), time_lut)
sec = ec[0, :]
assert len(sec._lookup_tables) == 1
assert u.allclose(
sec['lat'].wcs.pixel_to_world_values(list(range(2))),
ec['lat'].wcs.pixel_to_world_values([0, 0], list(range(2))))
assert u.allclose(
sec['lon'].wcs.pixel_to_world_values(list(range(2))),
ec['lon'].wcs.pixel_to_world_values([0, 0], list(range(2))))
sec = ec[:, 0]
assert len(sec._lookup_tables) == 2
assert u.allclose(
sec['lat'].wcs.pixel_to_world_values(list(range(2))),
ec['lat'].wcs.pixel_to_world_values(list(range(2)), [0, 0]))
assert u.allclose(
sec['lon'].wcs.pixel_to_world_values(list(range(2))),
ec['lon'].wcs.pixel_to_world_values(list(range(2)), [0, 0]))
assert u.allclose(
sec['exposure_time'].wcs.pixel_to_world_values(list(range(2)),
list(range(2))),
ec['exposure_time'].wcs.pixel_to_world_values(list(range(2)),
list(range(2))))
def test_skycoord_mesh_false(skycoord_2d_lut):
ec = ExtraCoords()
ec.add_coordinate(("lat", "lon"), (0, 1), skycoord_2d_lut, mesh=False)
assert len(ec._lookup_tables) == 1
assert ec.mapping == (0, 1)
assert isinstance(ec.wcs, gwcs.WCS)
assert ec.wcs.pixel_n_dim == 2
assert ec.wcs.world_n_dim == 2
assert ec.wcs.world_axis_names == ("lat", "lon")
def test_slice_extra_1d(time_lut, wave_lut):
ec = ExtraCoords()
ec.add_coordinate("time", 0, time_lut)
ec.add_coordinate("wavey", 1, wave_lut)
sec = ec[:, 3:7]
assert len(sec._lookup_tables) == 2
assert u.allclose(sec['wavey'].wcs.pixel_to_world_values(list(range(4))),
ec['wavey'].wcs.pixel_to_world_values(list(range(3, 7))))
assert u.allclose(sec['time'].wcs.pixel_to_world_values(list(range(4))),
ec['time'].wcs.pixel_to_world_values(list(range(4))))
def test_mapping_setter(wcs_1d_l, wave_lut):
ec = ExtraCoords(wcs=wcs_1d_l, mapping=(0, ))
with pytest.raises(AttributeError):
ec.mapping = None
ec = ExtraCoords()
ec.wcs = wcs_1d_l
with pytest.raises(ValueError):
ec.mapping = (1, )
ec = ExtraCoords()
ec.add_coordinate("wave", (0, ), wave_lut)
with pytest.raises(AttributeError):
ec.mapping = None
def test_skycoord_1_pixel(skycoord_1d_lut):
ec = ExtraCoords()
ec.add_coordinate(("lon", "lat"), 0, skycoord_1d_lut, mesh=False)
assert len(ec._lookup_tables) == 1
assert ec.mapping == (0, )
assert isinstance(ec.wcs, gwcs.WCS)
assert ec.wcs.pixel_n_dim == 1
assert ec.wcs.world_n_dim == 2
assert ec.wcs.world_axis_names == ("lon", "lat")
sec = ec[1:4]
assert sec.wcs.pixel_n_dim == 1
assert sec.wcs.world_n_dim == 2
assert sec.wcs.world_axis_names == ("lon", "lat")
def test_slice_extra_twice(time_lut, wave_lut):
ec = ExtraCoords()
ec.add_coordinate("time", 0, time_lut)
ec.add_coordinate("wavey", 1, wave_lut)
sec = ec[1:, 0]
assert len(sec._lookup_tables) == 1
assert u.allclose(sec['time'].wcs.pixel_to_world_values(list(range(0, 2))),
ec['time'].wcs.pixel_to_world_values(list(range(1, 3))))
sec = sec[1:, 0]
assert len(sec._lookup_tables) == 1
assert u.allclose(sec['time'].wcs.pixel_to_world_values(list(range(0, 2))),
ec['time'].wcs.pixel_to_world_values(list(range(2, 4))))
def test_exceptions(wcs_1d_l):
# Test fail when one of wcs or mapping specified
with pytest.raises(ValueError):
ExtraCoords(wcs=wcs_1d_l)
with pytest.raises(ValueError):
ExtraCoords(mapping=0)
# Test unable to specify inconsistent dimensions and tables
with pytest.raises(ValueError):
ExtraCoords.from_lookup_tables(None, (0, ), (0, 0))
# Test unable to add to WCS EC
ec = ExtraCoords(wcs=wcs_1d_l, mapping=(0, ))
with pytest.raises(ValueError):
ec.add_coordinate(None, 0, None)
with pytest.raises(KeyError):
ExtraCoords()['empty']
def test_slice_extra_2d(time_lut, skycoord_2d_lut):
ec = ExtraCoords()
ec.add_coordinate(("lat", "lon"), (0, 1), skycoord_2d_lut, mesh=False)
ec.add_coordinate("exposure_time", (0, ), time_lut)
sec = ec[1:5, 1:5]
assert len(sec._lookup_tables) == 2
assert u.allclose(
sec['lat'].wcs.pixel_to_world_values(list(range(2)), list(range(2))),
ec['lat'].wcs.pixel_to_world_values(list(range(1, 3)),
list(range(1, 3))))
assert u.allclose(
sec['lon'].wcs.pixel_to_world_values(list(range(2)), list(range(2))),
ec['lon'].wcs.pixel_to_world_values(list(range(1, 3)),
list(range(1, 3))))
assert u.allclose(
sec['exposure_time'].wcs.pixel_to_world_values(list(range(0, 3))),
ec['exposure_time'].wcs.pixel_to_world_values(list(range(1, 4))))
def test_extra_coords_2d_quantity(quantity_2d_lut):
ec = ExtraCoords()
ec.add_coordinate("velocity", (0, 1), quantity_2d_lut)
ec.wcs.pixel_to_world(0, 0)
