mirror of
https://github.com/pybind/pybind11.git
synced 2024-11-24 14:15:11 +00:00
d2ec836712
* Add support for nested C++11 exceptions * Remove wrong include * Fix if directive * Fix missing skipif * Simplify code and try to work around MSVC bug * Clarify comment * Further simplify code * Remove the last extra throw statement * Qualify auto * Fix typo * Add missing return for consistency * Fix clang-tidy complaint * Fix python2 stub * Make clang-tidy happy * Fix compile error * Fix python2 function signature * Extract C++20 utility and backport * Cleanup code a bit more * Improve test case * Consolidate code and fix signature * Fix typo
276 lines
8.8 KiB
Python
276 lines
8.8 KiB
Python
# -*- coding: utf-8 -*-
|
|
import sys
|
|
|
|
import pytest
|
|
|
|
import env
|
|
import pybind11_cross_module_tests as cm
|
|
from pybind11_tests import exceptions as m
|
|
|
|
|
|
def test_std_exception(msg):
|
|
with pytest.raises(RuntimeError) as excinfo:
|
|
m.throw_std_exception()
|
|
assert msg(excinfo.value) == "This exception was intentionally thrown."
|
|
|
|
|
|
def test_error_already_set(msg):
|
|
with pytest.raises(RuntimeError) as excinfo:
|
|
m.throw_already_set(False)
|
|
assert msg(excinfo.value) == "Unknown internal error occurred"
|
|
|
|
with pytest.raises(ValueError) as excinfo:
|
|
m.throw_already_set(True)
|
|
assert msg(excinfo.value) == "foo"
|
|
|
|
|
|
@pytest.mark.skipif("env.PY2")
|
|
def test_raise_from(msg):
|
|
with pytest.raises(ValueError) as excinfo:
|
|
m.raise_from()
|
|
assert msg(excinfo.value) == "outer"
|
|
assert msg(excinfo.value.__cause__) == "inner"
|
|
|
|
|
|
@pytest.mark.skipif("env.PY2")
|
|
def test_raise_from_already_set(msg):
|
|
with pytest.raises(ValueError) as excinfo:
|
|
m.raise_from_already_set()
|
|
assert msg(excinfo.value) == "outer"
|
|
assert msg(excinfo.value.__cause__) == "inner"
|
|
|
|
|
|
def test_cross_module_exceptions(msg):
|
|
with pytest.raises(RuntimeError) as excinfo:
|
|
cm.raise_runtime_error()
|
|
assert str(excinfo.value) == "My runtime error"
|
|
|
|
with pytest.raises(ValueError) as excinfo:
|
|
cm.raise_value_error()
|
|
assert str(excinfo.value) == "My value error"
|
|
|
|
with pytest.raises(ValueError) as excinfo:
|
|
cm.throw_pybind_value_error()
|
|
assert str(excinfo.value) == "pybind11 value error"
|
|
|
|
with pytest.raises(TypeError) as excinfo:
|
|
cm.throw_pybind_type_error()
|
|
assert str(excinfo.value) == "pybind11 type error"
|
|
|
|
with pytest.raises(StopIteration) as excinfo:
|
|
cm.throw_stop_iteration()
|
|
|
|
with pytest.raises(cm.LocalSimpleException) as excinfo:
|
|
cm.throw_local_simple_error()
|
|
assert msg(excinfo.value) == "external mod"
|
|
|
|
with pytest.raises(KeyError) as excinfo:
|
|
cm.throw_local_error()
|
|
# KeyError is a repr of the key, so it has an extra set of quotes
|
|
assert str(excinfo.value) == "'just local'"
|
|
|
|
|
|
# TODO: FIXME
|
|
@pytest.mark.xfail(
|
|
"env.PYPY and env.MACOS",
|
|
raises=RuntimeError,
|
|
reason="Expected failure with PyPy and libc++ (Issue #2847 & PR #2999)",
|
|
)
|
|
def test_cross_module_exception_translator():
|
|
with pytest.raises(KeyError):
|
|
# translator registered in cross_module_tests
|
|
m.throw_should_be_translated_to_key_error()
|
|
|
|
|
|
def test_python_call_in_catch():
|
|
d = {}
|
|
assert m.python_call_in_destructor(d) is True
|
|
assert d["good"] is True
|
|
|
|
|
|
def ignore_pytest_unraisable_warning(f):
|
|
unraisable = "PytestUnraisableExceptionWarning"
|
|
if hasattr(pytest, unraisable): # Python >= 3.8 and pytest >= 6
|
|
dec = pytest.mark.filterwarnings("ignore::pytest.{}".format(unraisable))
|
|
return dec(f)
|
|
else:
|
|
return f
|
|
|
|
|
|
# TODO: find out why this fails on PyPy, https://foss.heptapod.net/pypy/pypy/-/issues/3583
|
|
@pytest.mark.xfail(env.PYPY, reason="Failure on PyPy 3.8 (7.3.7)", strict=False)
|
|
@ignore_pytest_unraisable_warning
|
|
def test_python_alreadyset_in_destructor(monkeypatch, capsys):
|
|
hooked = False
|
|
triggered = [False] # mutable, so Python 2.7 closure can modify it
|
|
|
|
if hasattr(sys, "unraisablehook"): # Python 3.8+
|
|
hooked = True
|
|
# Don't take `sys.unraisablehook`, as that's overwritten by pytest
|
|
default_hook = sys.__unraisablehook__
|
|
|
|
def hook(unraisable_hook_args):
|
|
exc_type, exc_value, exc_tb, err_msg, obj = unraisable_hook_args
|
|
if obj == "already_set demo":
|
|
triggered[0] = True
|
|
default_hook(unraisable_hook_args)
|
|
return
|
|
|
|
# Use monkeypatch so pytest can apply and remove the patch as appropriate
|
|
monkeypatch.setattr(sys, "unraisablehook", hook)
|
|
|
|
assert m.python_alreadyset_in_destructor("already_set demo") is True
|
|
if hooked:
|
|
assert triggered[0] is True
|
|
|
|
_, captured_stderr = capsys.readouterr()
|
|
# Error message is different in Python 2 and 3, check for words that appear in both
|
|
assert "ignored" in captured_stderr and "already_set demo" in captured_stderr
|
|
|
|
|
|
def test_exception_matches():
|
|
assert m.exception_matches()
|
|
assert m.exception_matches_base()
|
|
assert m.modulenotfound_exception_matches_base()
|
|
|
|
|
|
def test_custom(msg):
|
|
# Can we catch a MyException?
|
|
with pytest.raises(m.MyException) as excinfo:
|
|
m.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:
|
|
m.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:
|
|
m.throws3()
|
|
assert msg(excinfo.value) == "Caught an unknown exception!"
|
|
|
|
# Can we delegate to another handler by rethrowing?
|
|
with pytest.raises(m.MyException) as excinfo:
|
|
m.throws4()
|
|
assert msg(excinfo.value) == "this error is rethrown"
|
|
|
|
# Can we fall-through to the default handler?
|
|
with pytest.raises(RuntimeError) as excinfo:
|
|
m.throws_logic_error()
|
|
assert (
|
|
msg(excinfo.value) == "this error should fall through to the standard handler"
|
|
)
|
|
|
|
# OverFlow error translation.
|
|
with pytest.raises(OverflowError) as excinfo:
|
|
m.throws_overflow_error()
|
|
|
|
# Can we handle a helper-declared exception?
|
|
with pytest.raises(m.MyException5) as excinfo:
|
|
m.throws5()
|
|
assert msg(excinfo.value) == "this is a helper-defined translated exception"
|
|
|
|
# Exception subclassing:
|
|
with pytest.raises(m.MyException5) as excinfo:
|
|
m.throws5_1()
|
|
assert msg(excinfo.value) == "MyException5 subclass"
|
|
assert isinstance(excinfo.value, m.MyException5_1)
|
|
|
|
with pytest.raises(m.MyException5_1) as excinfo:
|
|
m.throws5_1()
|
|
assert msg(excinfo.value) == "MyException5 subclass"
|
|
|
|
with pytest.raises(m.MyException5) as excinfo:
|
|
try:
|
|
m.throws5()
|
|
except m.MyException5_1:
|
|
raise RuntimeError("Exception error: caught child from parent")
|
|
assert msg(excinfo.value) == "this is a helper-defined translated exception"
|
|
|
|
|
|
def test_nested_throws(capture):
|
|
"""Tests nested (e.g. C++ -> Python -> C++) exception handling"""
|
|
|
|
def throw_myex():
|
|
raise m.MyException("nested error")
|
|
|
|
def throw_myex5():
|
|
raise m.MyException5("nested error 5")
|
|
|
|
# In the comments below, the exception is caught in the first step, thrown in the last step
|
|
|
|
# C++ -> Python
|
|
with capture:
|
|
m.try_catch(m.MyException5, throw_myex5)
|
|
assert str(capture).startswith("MyException5: nested error 5")
|
|
|
|
# Python -> C++ -> Python
|
|
with pytest.raises(m.MyException) as excinfo:
|
|
m.try_catch(m.MyException5, throw_myex)
|
|
assert str(excinfo.value) == "nested error"
|
|
|
|
def pycatch(exctype, f, *args):
|
|
try:
|
|
f(*args)
|
|
except m.MyException as e:
|
|
print(e)
|
|
|
|
# C++ -> Python -> C++ -> Python
|
|
with capture:
|
|
m.try_catch(
|
|
m.MyException5,
|
|
pycatch,
|
|
m.MyException,
|
|
m.try_catch,
|
|
m.MyException,
|
|
throw_myex5,
|
|
)
|
|
assert str(capture).startswith("MyException5: nested error 5")
|
|
|
|
# C++ -> Python -> C++
|
|
with capture:
|
|
m.try_catch(m.MyException, pycatch, m.MyException5, m.throws4)
|
|
assert capture == "this error is rethrown"
|
|
|
|
# Python -> C++ -> Python -> C++
|
|
with pytest.raises(m.MyException5) as excinfo:
|
|
m.try_catch(m.MyException, pycatch, m.MyException, m.throws5)
|
|
assert str(excinfo.value) == "this is a helper-defined translated exception"
|
|
|
|
|
|
@pytest.mark.skipif("env.PY2")
|
|
def test_throw_nested_exception():
|
|
with pytest.raises(RuntimeError) as excinfo:
|
|
m.throw_nested_exception()
|
|
assert str(excinfo.value) == "Outer Exception"
|
|
assert str(excinfo.value.__cause__) == "Inner Exception"
|
|
|
|
|
|
# This can often happen if you wrap a pybind11 class in a Python wrapper
|
|
def test_invalid_repr():
|
|
class MyRepr(object):
|
|
def __repr__(self):
|
|
raise AttributeError("Example error")
|
|
|
|
with pytest.raises(TypeError):
|
|
m.simple_bool_passthrough(MyRepr())
|
|
|
|
|
|
def test_local_translator(msg):
|
|
"""Tests that a local translator works and that the local translator from
|
|
the cross module is not applied"""
|
|
with pytest.raises(RuntimeError) as excinfo:
|
|
m.throws6()
|
|
assert msg(excinfo.value) == "MyException6 only handled in this module"
|
|
|
|
with pytest.raises(RuntimeError) as excinfo:
|
|
m.throws_local_error()
|
|
assert not isinstance(excinfo.value, KeyError)
|
|
assert msg(excinfo.value) == "never caught"
|
|
|
|
with pytest.raises(Exception) as excinfo:
|
|
m.throws_local_simple_error()
|
|
assert not isinstance(excinfo.value, cm.LocalSimpleException)
|
|
assert msg(excinfo.value) == "this mod"
|