def test_diffgeom():
from sympy.diffgeom import Manifold, Patch, CoordSystem, BaseScalarField
m = Manifold('M', 2)
assert str(m) == "M"
p = Patch('P', m)
assert str(p) == "P"
rect = CoordSystem('rect', p)
assert str(rect) == "rect"
b = BaseScalarField(rect, 0)
assert str(b) == "rect_0"
def test_diffgeom():
from sympy.diffgeom import Manifold, Patch, CoordSystem, BaseScalarField
x,y = symbols('x y', real=True)
m = Manifold('M', 2)
assert str(m) == "M"
p = Patch('P', m)
assert str(p) == "P"
rect = CoordSystem('rect', p, [x, y])
assert str(rect) == "rect"
b = BaseScalarField(rect, 0)
assert str(b) == "x"
def test_diffgeom():
from sympy.diffgeom import Manifold, Patch, CoordSystem, BaseScalarField
m = Manifold('M', 2)
p = Patch('P', m)
rect = CoordSystem('rect', p)
assert srepr(
rect
) == "CoordSystem(Str('rect'), Patch(Str('P'), Manifold(Str('M'), Integer(2))), ('rect_0', 'rect_1'))"
b = BaseScalarField(rect, 0)
assert srepr(
b
) == "BaseScalarField(CoordSystem(Str('rect'), Patch(Str('P'), Manifold(Str('M'), Integer(2))), ('rect_0', 'rect_1')), Integer(0))"
