Since the intent of our testing code was clearly to clear this cache
for every test, there's no reason for it to be a module-level global.
This allows us to remove an unnecessary import from test_runner.py,
which in combination with DEFAULT_REALM's definition was causing us to
run models code before running migrations inside test-backend.
(That bug, in turn, caused test-backend's check for whether migrations
needs to be run to happen sadly after trying to access a Realm,
trigger a test-backend crash if the Realm model had changed since the
last provision).
Previous cleanups (mostly the removals of Python __future__ imports)
were done in a way that introduced leading newlines. Delete leading
newlines from all files, except static/assets/zulip-emoji/NOTICE,
which is a verbatim copy of the Apache 2.0 license.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
Per the import line:
`from unittest import loader, runner # type: ignore # Mypy cannot pick
these up.`
Because `TextTestResult` inherits from `runner.TextTestResult`, mypy
doesn't see `self` as having an attribute `stream`, so we ignore these
instead of cluttering with `casts` or `isinstances`.
It was discovered that errors such as:
`OSError: [Errno 16] Device or resource busy`
potentially arise when running in serial mode, or with
explicit test cases passed to `test-backend`.
We create a path structure in the from:
`/var/<uuid>/test-backend/run_1234567/worker_N/`
A settings attribute, `TEST_WORKER_DIR`, was created as a worker's
directory for a given `test-backend` run's file storage. The
appropirate path is created in `setup_test_environment`, while each
workers subdirectory is created within `init_worker`.
This allows a test class to write to `settings.TEST_WORKER_DIR`,
populating the appropirate directory of a given worker. Also
providing the long-term approach to clean up filesystem access
in the backend unit tests.
The ids that will be used for each particular run of the test suite are
written to a unique file. Each file will then be used as a time
reference of when the suite was ran.
This change sets up the ability for a complete clean up of potentially
leaked database templates.
Tweaked by tabbott to remove these files after successful database
cleanup.
When running the test-backend suite in serial mode, `destroy_test_db`
double appends the database id number to the template if passed an
argument for `number`. The comment here explains this behavior.
N = self.parallel templates are created, and these templates were
previously named 'zulip_test_template_<1, N>'. However, to support
running multiple instances of `test-backend`, a unique
`random_id_range_start` was created for each template database.
There was no problem prior because the templates would simply be
used again and thus did not require any clean up. Now that there are
unique database names being created, every time `test-backend` is run
these templates can accumulate on disk. Instead, we clean up our
templates at the end of every complete run of the test suite, or upon a
SIGINT.
Fixes: #12426
Sometimes it's useful to run two copies of test-backend at the same
time. The problem with doing so is that we need to make sure no two
threads are using the same test database ID.
Previously, this worked only if at most one of those copies was
running in the single-threaded mode, because we used a random database
ID for the single-threaded code path, but the same IDs counting from 0
for the parallel code path.
Fix this, mostly, by generating a random start for the range of IDs
used by the process, and then counting off database IDs starting from
there (both in the parallel and non-paralllel modes).
There's still a very low probability race, see the TODO.
Additionally, there appear to be some other races with running two
copies of test-backend at the same time not related to the database.
See https://github.com/zulip/zulip/issues/12426 for a follow-up issue
that's sorta created by this.
This optimizes test-backend by skipping webhook
tests when run in default mode.
Tweaked by tabbott to extend the documentation and update the CI
commands.
This code takes care of the environment running Python 3.4 when
test label is passed directly to the test-backend command:
./tools/test-backend test_alert_words
In Django 1.11, args argument of run_subsuite function is a tuple of
length 4. The new argument is the test runner class which we do not
need because we run tests using our own version of the test runner.
We enable data_suffix option when creating Coverage instances which
causes the output files to include the hostname, pid, and random id.
Before each run erase is called which clears all existing coverage data
files. And then at the end of the test run use the combine method which
merges the reports.
We collect coverage in the main process which collects data from
imports and also when running in single process mode. In the workers we
collect coverage in run_subsuite. This creates more stats files than
strictly required but I don't see a better place to save the stats when
stopping workers.
Note that this has the side effect of enabling parallel testing in
Travis CI.
Tim Abbott
Anders Kaseorg
Wyatt Hoodes
Raymond Akornor
Anders Kaseorg
Aditya Bansal
Patrick Grave
Umair Khan
Alena Volkova
Steve Howell
rht
derAnfaenger
neiljp (Neil Pilgrim)
Jason Michalski