def test_orbit_change_attractor_closed():
with pytest.raises(ValueError) as excinfo:
iss.change_attractor(Sun)
assert (
"ValueError: Orbit will never leave the SOI of its current attractor"
in excinfo.exconly()
)
def test_can_set_iss_attractor_to_earth():
# See https://github.com/poliastro/poliastro/issues/798
epoch = Time("2019-11-10 12:00:00")
iss = Orbit.from_horizons(
"International Space Station", Sun, epoch=epoch, id_type="majorbody"
)
iss = iss.change_attractor(Earth)
assert iss.attractor == Earth
def test_issue_798():
epoch = Time("2019-11-10 12:00:00")
iss = Orbit.from_horizons("International Space Station",
Sun,
epoch=epoch,
id_type="majorbody")
iss = iss.change_attractor(Earth)
assert iss.attractor == Earth
def test_can_set_iss_attractor_to_earth():
# See https://github.com/poliastro/poliastro/issues/798
epoch = Time("2019-11-10 12:00:00")
ephem = Ephem.from_horizons("International Space Station",
epochs=epoch,
attractor=Sun,
id_type=None)
iss = Orbit.from_ephem(Sun, ephem, epoch)
iss = iss.change_attractor(Earth)
assert iss.attractor == Earth
def test_orbit_change_attractor_unrelated_body():
with pytest.raises(ValueError) as excinfo:
iss.change_attractor(Mars)
assert "ValueError: Cannot change to unrelated attractor" in excinfo.exconly()
def test_orbit_change_attractor_returns_self():
assert iss.change_attractor(iss.attractor) is iss
