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Project Description

Services plugin for pytest testing framework

Install pytest-services

pip install pytest-services

Features

The plugin provides a set of fixtures and utility functions to start service processes for your tests with pytest

Fixtures

  • run_services

    Determines whethere services should be run or not. False by default if not in distributed environment (without pytest-xdist). Can be manually set to True by overriding this fixture in your test config or just by using –run-services command line argument (see below).

Infrastructure fixtures

  • slave_id

    Id of the slave if tests are run using pytest-xdist. It is set to local if tests are not run using pytest-xdist (with –dist command line option set to load).

  • session_id

    Test session id. Globally unique, and of course also guaranteed to be different for potentially multiple test sessions running on same test node via pytest-xdist.

  • watcher_getter

    Function to instantiate test service watcher (popen object). Includes automatic finalization (exiting) of the service process, and testing the service before returning the watcher from the function. Example of usage for memcached service:

@pytest.fixture(scope='session')
def memcached(request, run_services, memcached_socket, watcher_getter):
    """The memcached instance which is ready to be used by the tests."""
    if run_services:
        return watcher_getter(
            name='memcached',
            arguments=['-s', memcached_socket],
            checker=lambda: os.path.exists(memcached_socket))
  • services_log

    Logger used for debug logging when managing test services.

  • root_dir

    Parent directory for test service artifacts (disk based). Set to /tmp by default.

  • base_dir

    Base directory for test service artifacts (disk based), unique subdirectory of root_dir. Automatically removed recursively at the end of the test session.

  • temp_dir

    Temporary directory (disk based), subfolder of the base_dir. Used for strictly temporary artifacts (for example - folder where files are uploaded from the user input).

  • memory_root_dir

    Parent directory for test service artifacts (memory based). Main idea of having memory base directory is to store performance-critical files there. For example - mysql service will use it to store database file, it speeds up mysql server a lot, especially database management operations. Set to /var/shm by default, with a fallback to ‘root_dir`. Note that if apparmor is running on your system, most likely it will prevent your test service to use it (for example - mysql has it’s apparmor profile). You you’ll need to disable such profile in apparmor configuration. Example of disabling apparmor for mysqld:

sudo ln -s /etc/apparmor.d/usr.sbin.mysqld /etc/apparmor.d/disable/
sudo /etc/init.d/apparmor restart
  • memory_base_dir

    Base directory for test service artifacts (memory based), unique subdirectory of memory_root_dir. Automatically removed recursively at the end of the test session.

  • memory_temp_dir

    Temporary directory (memory based), subfolder of the base_dir.

  • lock_dir

    Lock files directory for storing locks created for resource assignment (ports, display, etc). Subfolder of memory_root_dir.

  • run_dir

    Process id and socket files directory (like system-wide /var/run but local for test session). Subfolder of memory_root_dir.

  • port_getter

    Function to get unallocated port. Automatically ensures locking and un-locking of it on application level via flock.

  • display_getter

    Function to get unallocated display. Automatically ensures locking and un-locking of it on application level via flock.

Service fixtures

  • memcached

    Start memcached instance.

  • memcached_socket

    Memcached unix socket file name to be used for connection.

  • memcached_connection

    Memcached connection string.

  • do_memcached_clean

    Determine if memcached should be cleared before every test run. Equals to run_services fixture by default.

  • mysql

    Start mysql-server instance.

  • mysql_database_name

    MySQL database name to be created after initialization of the mysql service system database.

  • mysql_database_getter

    Function with single parameter - database name. To create additional database(s) for tests. Used in mysql_database fixture which is used by mysql one.

  • mysql_connection

    MySQL connection string.

  • xvfb

    Start xvfb instance.

  • xvfb_display

    Xvfb display to use for connection.

  • xvfb_resolution

    Xvfb display resolution to use. Tuple in form (1366, 768, 8).

Utility functions

Django settings

In some cases, there’s a need of switching django settings during test run, because several django projects are tested whithin the single test suite. pytest_services.django_settings simplifies switching of django settings to a single function call:

  • setup_django_settings

    Override the enviroment variable and call the _setup method of the settings object to reload them.

Example of usage:

conftest.py:

from pytest_services import django_settings

django_settings.clean_django_settings()
django_settings.setup_django_settings('your.project.settings')

Note that the nice project pytest-django doesn’t help with the situation, as it’s single django project oriented, as well as standard django testing technique. Single project approach works fine, as long as there are no fixtures to share between them, but when there are fixtures to share, then you can get benefit of joining several django projects tests into a single test run, because all session-scoped fixtures will be instantiated only once for all projects tests. The benefit is only visible if you have big enough test suite and your fixtures are heavy enough.

Command-line options

  • –run-services

    Force services to be run even if tests are executed in a non-distributed way (without pytest-xdist).

  • –xvfb-display

    Skip xvfb service to run and use provided display. Useful when you need to run all services except the xvfb to debug your browser tests, if, for example you use pytest-splinter with or without pytest-bdd.

Example

test_your_test.py:

import MySQLdb


def test_some_mysql_stuff(mysql):
    """Test using mysql server."""
    conn = MySQLdb.connect(user='root')

Contact

If you have questions, bug reports, suggestions, etc. please create an issue on the GitHub project page.

License

This software is licensed under the MIT license

See License file

© 2014 Anatoly Bubenkov, Paylogic International and others.

Changelog

1.1.14

  • Use a different strategy to determine whether xvfb supports (youtux )

1.1.12

  • use realpath for mysql base dir (bubenkoff)

1.1.11

  • exclude locked displays for xvfb (bubenkoff)

1.1.7

  • django settings fix (olegpidsadnyi)

1.1.3

  • django 1.8 support (bubenkoff)

1.1.2

  • old django support fix (olegpidsadnyi)

1.1.0

  • django 1.7+ support (bubenkoff)

1.0.10

  • removed auto artifacts cleanup (bubenkoff)

1.0.8

  • fixed popen arguments (bubenkoff)

1.0.2

  • added port and display getters (bubenkoff)

1.0.1

  • Improved documentation (bubenkoff)

1.0.0

  • Initial public release
Release History

Release History

1.1.14

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1.1.1

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1.0.1

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Download Files

TODO: Brief introduction on what you do with files - including link to relevant help section.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
pytest-services-1.1.14.tar.gz (17.1 kB) Copy SHA256 Checksum SHA256 Source Jul 29, 2016

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