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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]) | |