from _pytest.pytester import Pytester import pytest @pytest.mark.filterwarnings("default::pytest.PytestUnhandledThreadExceptionWarning") def test_unhandled_thread_exception(pytester: Pytester) -> None: pytester.makepyfile( test_it=""" import threading def test_it(): def oops(): raise ValueError("Oops") t = threading.Thread(target=oops, name="MyThread") t.start() t.join() def test_2(): pass """ ) result = pytester.runpytest() assert result.ret == 0 assert result.parseoutcomes() == {"passed": 2, "warnings": 1} result.stdout.fnmatch_lines( [ "*= warnings summary =*", "test_it.py::test_it", " * PytestUnhandledThreadExceptionWarning: Exception in thread MyThread", " ", " Traceback (most recent call last):", " ValueError: Oops", " ", " warnings.warn(pytest.PytestUnhandledThreadExceptionWarning(msg))", ] ) @pytest.mark.filterwarnings("default::pytest.PytestUnhandledThreadExceptionWarning") def test_unhandled_thread_exception_in_setup(pytester: Pytester) -> None: pytester.makepyfile( test_it=""" import threading import pytest @pytest.fixture def threadexc(): def oops(): raise ValueError("Oops") t = threading.Thread(target=oops, name="MyThread") t.start() t.join() def test_it(threadexc): pass def test_2(): pass """ ) result = pytester.runpytest() assert result.ret == 0 assert result.parseoutcomes() == {"passed": 2, "warnings": 1} result.stdout.fnmatch_lines( [ "*= warnings summary =*", "test_it.py::test_it", " * PytestUnhandledThreadExceptionWarning: Exception in thread MyThread", " ", " Traceback (most recent call last):", " ValueError: Oops", " ", " warnings.warn(pytest.PytestUnhandledThreadExceptionWarning(msg))", ] ) @pytest.mark.filterwarnings("default::pytest.PytestUnhandledThreadExceptionWarning") def test_unhandled_thread_exception_in_teardown(pytester: Pytester) -> None: pytester.makepyfile( test_it=""" import threading import pytest @pytest.fixture def threadexc(): def oops(): raise ValueError("Oops") yield t = threading.Thread(target=oops, name="MyThread") t.start() t.join() def test_it(threadexc): pass def test_2(): pass """ ) result = pytester.runpytest() assert result.ret == 0 assert result.parseoutcomes() == {"passed": 2, "warnings": 1} result.stdout.fnmatch_lines( [ "*= warnings summary =*", "test_it.py::test_it", " * PytestUnhandledThreadExceptionWarning: Exception in thread MyThread", " ", " Traceback (most recent call last):", " ValueError: Oops", " ", " warnings.warn(pytest.PytestUnhandledThreadExceptionWarning(msg))", ] ) @pytest.mark.filterwarnings("error::pytest.PytestUnhandledThreadExceptionWarning") def test_unhandled_thread_exception_warning_error(pytester: Pytester) -> None: pytester.makepyfile( test_it=""" import threading import pytest def test_it(): def oops(): raise ValueError("Oops") t = threading.Thread(target=oops, name="MyThread") t.start() t.join() def test_2(): pass """ ) result = pytester.runpytest() assert result.ret == pytest.ExitCode.TESTS_FAILED assert result.parseoutcomes() == {"passed": 1, "failed": 1}