def test_geostationary_input(attractor):
with pytest.raises(ValueError) as excinfo:
Orbit.geostationary(attractor=attractor)
assert (
"ValueError: At least one among angular_velocity or period must be passed"
in excinfo.exconly())
def test_geostationary_non_existence_condition(attractor, period, hill_radius):
with pytest.raises(ValueError) as excinfo:
Orbit.geostationary(attractor=attractor,
period=period,
hill_radius=hill_radius)
assert ("Geostationary orbit for the given parameters doesn't exist"
in excinfo.exconly())
def test_geostationary_creation_with_Hill_radius(attractor, period,
hill_radius, expected_a):
ss = Orbit.geostationary(attractor=attractor,
period=period,
hill_radius=hill_radius)
assert_quantity_allclose(ss.a, expected_a, rtol=1.0e-7)
assert_quantity_allclose(ss.period, period, rtol=1.0e-7)
def test_geostationary_creation_from_angular_velocity(attractor,
angular_velocity,
expected_a,
expected_period):
ss = Orbit.geostationary(attractor=attractor,
angular_velocity=angular_velocity)
assert_quantity_allclose(ss.a, expected_a, rtol=1.0e-7)
assert_quantity_allclose(ss.period, expected_period, rtol=1.0e-7)
def test_geostationary_creation_from_period(attractor, period, expected_a):
ss = Orbit.geostationary(attractor=attractor, period=period)
assert_quantity_allclose(ss.a, expected_a, rtol=1.0e-7)
assert_quantity_allclose(ss.period, period, rtol=1.0e-7)
