

import pytest

from brian2 import *


def test_error_message():
    if prefs.codegen.target != 'numpy':
        pytest.skip('numpy-only test')

    @check_units(x=1, result=1)
    def foo(x):
        raise ValueError()

    G = NeuronGroup(1, 'v : 1')
    G.run_regularly('v = foo(3)')
    with pytest.raises(BrianObjectException) as exc:
        run(defaultclock.dt)
        # The actual code line should be mentioned in the error message
        exc.match('v = foo(3)')


if __name__ == '__main__':
    prefs.codegen.target = 'numpy'
    test_error_message()
