def test_cosmo_change():
"""Can we change the cosmology settings.
"""
from sherpa.astro import xspec
old_h0, old_q0, old_l0 = xspec.get_xscosmo()
new_h0 = 51.0
new_q0 = 0.2
new_l0 = 0.48
if old_h0 == pytest.approx(new_h0):
new_h0 -= 10.0
if old_q0 == pytest.approx(new_q0):
new_q0 -= 0.05
if old_l0 == pytest.approx(new_l0):
new_l0 += 0.01
try:
xspec.set_xscosmo(new_h0, new_q0, new_l0)
nval_h0, nval_q0, nval_l0 = xspec.get_xscosmo()
finally:
xspec.set_xscosmo(old_h0, old_q0, old_l0)
assert nval_h0 == pytest.approx(new_h0)
assert nval_q0 == pytest.approx(new_q0)
assert nval_l0 == pytest.approx(new_l0)
def test_cosmo_change():
"""Can we change the cosmology settings.
"""
from sherpa.astro import xspec
old_h0, old_q0, old_l0 = xspec.get_xscosmo()
new_h0 = 51.0
new_q0 = 0.2
new_l0 = 0.48
if old_h0 == pytest.approx(new_h0):
new_h0 -= 10.0
if old_q0 == pytest.approx(new_q0):
new_q0 -= 0.05
if old_l0 == pytest.approx(new_l0):
new_l0 += 0.01
try:
xspec.set_xscosmo(new_h0, new_q0, new_l0)
nval_h0, nval_q0, nval_l0 = xspec.get_xscosmo()
finally:
xspec.set_xscosmo(old_h0, old_q0, old_l0)
assert nval_h0 == pytest.approx(new_h0)
assert nval_q0 == pytest.approx(new_q0)
assert nval_l0 == pytest.approx(new_l0)