def test_as_coeff_mul():
assert S(2).as_coeff_mul() == (2, ())
assert S(3.0).as_coeff_mul() == (1, (S(3.0),))
assert S(-3.0).as_coeff_mul() == (-1, (S(3.0),))
assert x.as_coeff_mul() == (1, (x,))
assert (-x).as_coeff_mul() == (-1, (x,))
assert (2 * x).as_coeff_mul() == (2, (x,))
assert (x * y).as_coeff_mul(y) == (x, (y,))
assert (3 + x).as_coeff_mul(y) == (3 + x, ())
# don't do expansion
e = exp(x + y)
assert e.as_coeff_mul(y) == (1, (e,))
e = 2 ** (x + y)
assert e.as_coeff_mul(y) == (1, (e,))
def test_as_coeff_mul():
assert S(2).as_coeff_mul() == (2, ())
assert S(3.0).as_coeff_mul() == (1, (S(3.0), ))
assert S(-3.0).as_coeff_mul() == (-1, (S(3.0), ))
assert x.as_coeff_mul() == (1, (x, ))
assert (-x).as_coeff_mul() == (-1, (x, ))
assert (2 * x).as_coeff_mul() == (2, (x, ))
assert (x * y).as_coeff_mul(y) == (x, (y, ))
assert (3 + x).as_coeff_mul(y) == (3 + x, ())
# don't do expansion
e = exp(x + y)
assert e.as_coeff_mul(y) == (1, (e, ))
e = 2**(x + y)
assert e.as_coeff_mul(y) == (1, (e, ))