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import unittest
from django.test import SimpleTestCase
from django.test.runner import RemoteTestResult
from django.utils.version import PY37, PY311
try:
import tblib
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_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
self.assertEqual(len(events), 4)
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 ""),
)
trailing_comma = '' if PY37 else ','
self.assertEqual(repr(event[3][1]), "AssertionError('0 != 1'%s)" % trailing_comma)
event = events[2]
self.assertEqual(repr(event[3][1]), "AssertionError('2 != 1'%s)" % trailing_comma)
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