pybind11/tests/test_exceptions.py

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import pytest
def test_custom(msg):
from pybind11_tests import (MyException, throws1, throws2, throws3, throws4,
throws_logic_error)
# Can we catch a MyException?"
with pytest.raises(MyException) as excinfo:
throws1()
assert msg(excinfo.value) == "this error should go to a custom type"
# Can we translate to standard Python exceptions?
with pytest.raises(RuntimeError) as excinfo:
throws2()
assert msg(excinfo.value) == "this error should go to a standard Python exception"
# Can we handle unknown exceptions?
with pytest.raises(RuntimeError) as excinfo:
throws3()
assert msg(excinfo.value) == "Caught an unknown exception!"
# Can we delegate to another handler by rethrowing?
with pytest.raises(MyException) as excinfo:
throws4()
assert msg(excinfo.value) == "this error is rethrown"
# "Can we fall-through to the default handler?"
with pytest.raises(RuntimeError) as excinfo:
throws_logic_error()
assert msg(excinfo.value) == "this error should fall through to the standard handler"