mirror of
https://github.com/pybind/pybind11.git
synced 2024-11-30 00:47:12 +00:00
b3794f1087
The custom exception handling added in PR #273 is robust, but is overly complex for declaring the most common simple C++ -> Python exception mapping that needs only to copy `what()`. This add a simpler `py::register_exception<CppExp>(module, "PyExp");` function that greatly simplifies the common basic case of translation of a simple CppException into a simple PythonException, while not removing the more advanced capabilities of defining custom exception handlers.
75 lines
2.5 KiB
Python
75 lines
2.5 KiB
Python
import pytest
|
|
|
|
|
|
def test_error_already_set(msg):
|
|
from pybind11_tests import throw_already_set
|
|
|
|
with pytest.raises(RuntimeError) as excinfo:
|
|
throw_already_set(False)
|
|
assert msg(excinfo.value) == "Unknown internal error occurred"
|
|
|
|
with pytest.raises(ValueError) as excinfo:
|
|
throw_already_set(True)
|
|
assert msg(excinfo.value) == "foo"
|
|
|
|
|
|
def test_python_call_in_catch():
|
|
from pybind11_tests import python_call_in_destructor
|
|
|
|
d = {}
|
|
assert python_call_in_destructor(d) is True
|
|
assert d["good"] is True
|
|
|
|
|
|
def test_custom(msg):
|
|
from pybind11_tests import (MyException, MyException5, MyException5_1,
|
|
throws1, throws2, throws3, throws4, throws5, throws5_1,
|
|
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"
|
|
|
|
# Can we handle a helper-declared exception?
|
|
with pytest.raises(MyException5) as excinfo:
|
|
throws5()
|
|
assert msg(excinfo.value) == "this is a helper-defined translated exception"
|
|
|
|
# Exception subclassing:
|
|
with pytest.raises(MyException5) as excinfo:
|
|
throws5_1()
|
|
assert msg(excinfo.value) == "MyException5 subclass"
|
|
assert isinstance(excinfo.value, MyException5_1)
|
|
|
|
with pytest.raises(MyException5_1) as excinfo:
|
|
throws5_1()
|
|
assert msg(excinfo.value) == "MyException5 subclass"
|
|
|
|
with pytest.raises(MyException5) as excinfo:
|
|
try:
|
|
throws5()
|
|
except MyException5_1 as e:
|
|
raise RuntimeError("Exception error: caught child from parent")
|
|
assert msg(excinfo.value) == "this is a helper-defined translated exception"
|