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| author | Ceesjan Luiten <ceesjan@ytec.nl> | 2021-05-21 16:49:01 +0200 |
|---|---|---|
| committer | Mariusz Felisiak <felisiak.mariusz@gmail.com> | 2021-06-10 07:32:15 +0200 |
| commit | cb6c19749d342c3dc0f97d89ff6887b220cf45b8 (patch) | |
| tree | 911c7a6913243e29751ac0a056be54a55febb034 /tests/test_runner | |
| parent | ed3af3ff4b3cfb72de598f1b39a1028ba3826efb (diff) | |
Refs #27734 -- Prevented creation of more parallel workers than TestCases.
The parallel test runner uses multiple workers to distribute the
workload. These workers are assigned a worker ID using a globally
incremented variable, which determines what test database to connect
to. When the worker ID surpasses the test database IDs Django will
crash.
This reduce likelihood of crashing parallel tests because
ParallelTestSuite will no longer create more workers than TestCases.
It won't eliminate the problem completely though because there are
other circumstances in which new workers can be created which can then
be assigned an "illegal" worker ID.
Diffstat (limited to 'tests/test_runner')
| -rw-r--r-- | tests/test_runner/test_discover_runner.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tests/test_runner/test_discover_runner.py b/tests/test_runner/test_discover_runner.py index 4eff76c5fd..3f840ee049 100644 --- a/tests/test_runner/test_discover_runner.py +++ b/tests/test_runner/test_discover_runner.py @@ -348,6 +348,12 @@ class DiscoverRunnerTests(SimpleTestCase): with self.assertRaisesMessage(ValueError, msg): DiscoverRunner(pdb=True, parallel=2) + def test_number_of_parallel_workers(self): + """Number of processes doesn't exceed the number of TestCases.""" + runner = DiscoverRunner(parallel=5, verbosity=0) + suite = runner.build_suite(['test_runner_apps.tagged']) + self.assertEqual(suite.processes, len(suite.subsuites)) + def test_buffer_mode_test_pass(self): runner = DiscoverRunner(buffer=True, verbose=0) with captured_stdout() as stdout, captured_stderr() as stderr: |