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django/tests/test_runner/test_parallel.py

146 lines
4.7 KiB
Python

import pickle
import sys
import unittest
from django.test import SimpleTestCase
from django.test.runner import RemoteTestResult
from django.utils.version import PY311, PY312
try:
import tblib.pickling_support
except ImportError:
tblib = None
class ExceptionThatFailsUnpickling(Exception):
"""
After pickling, this class fails unpickling with an error about incorrect
arguments passed to __init__().
"""
def __init__(self, arg):
super().__init__()
class ParallelTestRunnerTest(SimpleTestCase):
"""
End-to-end tests of the parallel test runner.
These tests are only meaningful when running tests in parallel using
the --parallel option, though it doesn't hurt to run them not in
parallel.
"""
def test_subtest(self):
"""
Passing subtests work.
"""
for i in range(2):
with self.subTest(index=i):
self.assertEqual(i, i)
class SampleFailingSubtest(SimpleTestCase):
# This method name doesn't begin with "test" to prevent test discovery
# from seeing it.
def dummy_test(self):
"""
A dummy test for testing subTest failures.
"""
for i in range(3):
with self.subTest(index=i):
self.assertEqual(i, 1)
class RemoteTestResultTest(SimpleTestCase):
def _test_error_exc_info(self):
try:
raise ValueError("woops")
except ValueError:
return sys.exc_info()
def test_was_successful_no_events(self):
result = RemoteTestResult()
self.assertIs(result.wasSuccessful(), True)
def test_was_successful_one_success(self):
result = RemoteTestResult()
result.addSuccess(None)
self.assertIs(result.wasSuccessful(), True)
def test_was_successful_one_expected_failure(self):
result = RemoteTestResult()
result.addExpectedFailure(None, self._test_error_exc_info())
self.assertIs(result.wasSuccessful(), True)
def test_was_successful_one_skip(self):
result = RemoteTestResult()
result.addSkip(None, "Skipped")
self.assertIs(result.wasSuccessful(), True)
@unittest.skipUnless(tblib is not None, "requires tblib to be installed")
def test_was_successful_one_error(self):
result = RemoteTestResult()
result.addError(None, self._test_error_exc_info())
self.assertIs(result.wasSuccessful(), False)
@unittest.skipUnless(tblib is not None, "requires tblib to be installed")
def test_was_successful_one_failure(self):
result = RemoteTestResult()
result.addFailure(None, self._test_error_exc_info())
self.assertIs(result.wasSuccessful(), False)
def test_picklable(self):
result = RemoteTestResult()
loaded_result = pickle.loads(pickle.dumps(result))
self.assertEqual(result.events, loaded_result.events)
def test_pickle_errors_detection(self):
picklable_error = RuntimeError("This is fine")
not_unpicklable_error = ExceptionThatFailsUnpickling("arg")
result = RemoteTestResult()
result._confirm_picklable(picklable_error)
msg = "__init__() missing 1 required positional argument"
with self.assertRaisesMessage(TypeError, msg):
result._confirm_picklable(not_unpicklable_error)
@unittest.skipUnless(tblib is not None, "requires tblib to be installed")
def test_add_failing_subtests(self):
"""
Failing subtests are added correctly using addSubTest().
"""
# Manually run a test with failing subtests to prevent the failures
# from affecting the actual test run.
result = RemoteTestResult()
subtest_test = SampleFailingSubtest(methodName="dummy_test")
subtest_test.run(result=result)
events = result.events
# addDurations added in Python 3.12.
if PY312:
self.assertEqual(len(events), 5)
else:
self.assertEqual(len(events), 4)
self.assertIs(result.wasSuccessful(), False)
event = events[1]
self.assertEqual(event[0], "addSubTest")
self.assertEqual(
str(event[2]),
"dummy_test (test_runner.test_parallel.SampleFailingSubtest%s) (index=0)"
# Python 3.11 uses fully qualified test name in the output.
% (".dummy_test" if PY311 else ""),
)
self.assertEqual(repr(event[3][1]), "AssertionError('0 != 1')")
event = events[2]
self.assertEqual(repr(event[3][1]), "AssertionError('2 != 1')")
@unittest.skipUnless(PY312, "unittest --durations option requires Python 3.12")
def test_add_duration(self):
result = RemoteTestResult()
result.addDuration(None, 2.3)
self.assertEqual(result.collectedDurations, [("None", 2.3)])