def test_Limit():
e = Limit(sin(x)/x, x, 0)
assert mcode(e) == "Hold[Limit[Sin[x]/x, x -> 0, Direction -> -1]]"
e = Limit(sin(x)/x, x, 0, "-")
assert mcode(e) == "Hold[Limit[Sin[x]/x, x -> 0, Direction -> 1]]"
e = Limit(sin(x)/x, x, 0, "real")
assert mcode(e) == "Hold[Limit[Sin[x]/x, x -> 0, Direction -> Reals]]"
def test_diofant_parser():
x = Symbol('x')
inputs = {
'2*x':
2 * x,
'3.00':
Float(3),
'22/7':
Rational(22, 7),
'2+3j':
2 + 3 * I,
'exp(x)':
exp(x),
'-(2)':
-Integer(2),
'[-1, -2, 3]': [Integer(-1), Integer(-2),
Integer(3)],
'Symbol("x").free_symbols':
x.free_symbols,
'Float(Integer(3).evalf(3))':
3.00,
'factorint(12, visual=True)':
Mul(Pow(2, 2, evaluate=False),
Pow(3, 1, evaluate=False),
evaluate=False),
'Limit(sin(x), x, 0, dir="-")':
Limit(sin(x), x, 0, dir='-'),
}
for text, result in inputs.items():
assert parse_expr(text) == result