Schwarzschild,
)
@pytest.mark.parametrize(
"metric_instance",
[
AlcubierreWarp(),
AntiDeSitter(),
AntiDeSitterStatic(),
DeSitter(),
Schwarzschild(),
Schwarzschild(c=1, sch=2),
Kerr(),
KerrNewman(),
Minkowski(),
MinkowskiCartesian(),
MinkowskiPolar(),
CMetric(),
Davidson(),
Godel(),
BesselGravitationalWave(),
BarriolaVilekin(),
BertottiKasner(),
Ernst(),
JanisNewmanWinicour(),
ReissnerNordstorm(),
],
)
def test_all_predefined_metrics(metric_instance):
assert isinstance(metric_instance, MetricTensor)
def test_Minkowski_equality():
# Minkowski and MinkowskiCartesian are same
assert simplify_sympy_array(
MinkowskiCartesian().tensor()) == simplify_sympy_array(
Minkowski().tensor())
### "custom-pprint"
def pprint(expr):
# unicode doesn't always play nicely with LaTeX
sympy.pprint(expr, use_unicode=False)
### "Schwarzschild"
sch = Schwarzschild()
t = sch.tensor()
pprint(t)
### @end
assert isinstance(sch, einsteinpy.symbolic.metric.MetricTensor)
snippets['Schwarzschild'] = latex(t)
### "Minkowski"
mink = Minkowski(c=1)
t = mink.tensor()
pprint(t)
### @end
assert isinstance(sch, einsteinpy.symbolic.metric.MetricTensor)
snippets['Minkowski'] = latex(t)
### "DeSitter"
mink = DeSitter()
t = mink.tensor()
pprint(t)
### @end
assert isinstance(sch, einsteinpy.symbolic.metric.MetricTensor)
snippets['DeSitter'] = latex(t)
### "AntiDeSitter"