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Simplify example and use syntax for env vars

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Bruno Oliveira
2022-03-10 09:25:37 -03:00
parent e3c1a3de67
commit 797867f23d
1 changed files with 19 additions and 22 deletions
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docs/how-to.rst
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@@ -24,9 +24,13 @@ When ``xdist`` is disabled (running with ``-n0`` for example), then
Worker processes also have the following environment variables Worker processes also have the following environment variables
defined: defined:
* ``PYTEST_XDIST_WORKER``: the name of the worker, e.g., ``"gw2"``. .. envvar:: PYTEST_XDIST_WORKER
* ``PYTEST_XDIST_WORKER_COUNT``: the total number of workers in this session,
e.g., ``"4"`` when ``-n 4`` is given in the command-line. The name of the worker, e.g., ``"gw2"``.
.. envvar:: PYTEST_XDIST_WORKER_COUNT
The total number of workers in this session, e.g., ``"4"`` when ``-n 4`` is given in the command-line.
The information about the worker_id in a test is stored in the ``TestReport`` as The information about the worker_id in a test is stored in the ``TestReport`` as
well, under the ``worker_id`` attribute. well, under the ``worker_id`` attribute.
@@ -116,7 +120,9 @@ wanted to create a separate database for each test run:
Additionally, during a test run, the following environment variable is defined: Additionally, during a test run, the following environment variable is defined:
* ``PYTEST_XDIST_TESTRUNUID``: the unique id of the test run. .. envvar:: PYTEST_XDIST_TESTRUNUID
The unique id of the test run.
Accessing ``sys.argv`` from the controller node in workers Accessing ``sys.argv`` from the controller node in workers
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -227,47 +233,38 @@ where executing a high-scope fixture exactly once is important.
Creating one log file for each worker Creating one log file for each worker
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
To create one log file for each worker with ``pytest-xdist``, add To create one log file for each worker with ``pytest-xdist``, you can leverage :envvar:`PYTEST_XDIST_WORKER`
an option to ``pytest.ini`` for the file base name. Then, in ``conftest.py``, an option to ``pytest.ini`` for the file base name. Then, in ``conftest.py``,
register it with ``pytest_addoption(parser)`` and use ``pytest_configure(config)`` register it with ``pytest_addoption(parser)`` and use ``pytest_configure(config)``
to rename it with the worker id. to rename it with the worker id.
Example: Example:
.. code-block:: python .. code-block:: ini
# content of pytest.ini
[pytest] [pytest]
log_file_format = %(asctime)s %(name)s %(levelname)s %(message)s log_file_format = %(asctime)s %(name)s %(levelname)s %(message)s
log_file_level = INFO log_file_level = INFO
worker_log_file = tests_%w.log worker_log_file = tests_{worker_id}.log
.. code-block:: python .. code-block:: python
# content of conftest.py # content of conftest.py
def pytest_addoption(parser): def pytest_addoption(parser):
log_help_text = 'Similar to log_file, but %w will be replaced with a worker identifier.' parser.addini('worker_log_file', help='Similar to log_file, but %w will be replaced with a worker identifier.')
parser.addini('worker_log_file', help=log_help_text)
def pytest_configure(config): def pytest_configure(config):
configure_logger(config) worker_id = os.environ.get('PYTEST_XDIST_WORKER')
if worker_id is not None:
def configure_logger(config):
if xdist_is_enabled():
log_file = config.getini('worker_log_file') log_file = config.getini('worker_log_file')
logging.basicConfig( logging.basicConfig(
format=config.getini('log_file_format'), format=config.getini('log_file_format'),
filename=log_file.replace('%w', os.environ.get('PYTEST_XDIST_WORKER')), filename=log_file.format(worker_id=worker_id),
level=config.getini('log_file_level') level=config.getini('log_file_level')
) )
def xdist_is_enabled(): When running the tests with ``-n3``, for example, three files will be created in the current directory:
return os.environ.get('PYTEST_XDIST_WORKER') is not None ``tests_gw0.log``, ``tests_gw1.log`` and ``tests_gw2.log``.
If running tests with ``-n3``, for example, three files would be created and named
as ``tests_gw0.log``, ``tests_gw1.log`` and ``tests_gw2.log``.