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# This testfile tests SymPy <-> SciPy compatibility
# Don't test any SymPy features here. Just pure interaction with SciPy.
# Always write regular SymPy tests for anything, that can be tested in pure
# Python (without scipy). Here we test everything, that a user may need when
# using SymPy with SciPy
from sympy.external import import_module
scipy = import_module('scipy')
if not scipy:
#bin/test will not execute any tests now
disabled = True
from sympy.functions.special.bessel import jn_zeros
def eq(a, b, tol=1e-6):
for x, y in zip(a, b):
if not (abs(x - y) < tol):
return False
return True
def test_jn_zeros():
assert eq(jn_zeros(0, 4, method="scipy"),
[3.141592, 6.283185, 9.424777, 12.566370])
assert eq(jn_zeros(1, 4, method="scipy"),
[4.493409, 7.725251, 10.904121, 14.066193])
assert eq(jn_zeros(2, 4, method="scipy"),
[5.763459, 9.095011, 12.322940, 15.514603])
assert eq(jn_zeros(3, 4, method="scipy"),
[6.987932, 10.417118, 13.698023, 16.923621])
assert eq(jn_zeros(4, 4, method="scipy"),
[8.182561, 11.704907, 15.039664, 18.301255])
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