Pytest Server Fixtures

This library provides an extensible framework for running up real network servers in your tests, as well as a suite of fixtures for some well-known webservices and databases.

Table of Contents

• Batteries Included
• Installation
• Configuration
• Common fixture properties
• MongoDB
• Postgres
• Redis
• S3 Minio
• Apache httpd
• Simple HTTP Server
• Xvfb
• Jenkins
• Server Framework
• Integration Tests

Batteries Included

Note: v2 fixtures support launching fixtures locally, in Docker containers or as Kubernetes pods (See Configuration)

Installation

Installation of this package varies on which parts of it you would like to use. It uses optional dependencies (specified in the table above) to reduce the number of 3rd party packages required. This way if you don't use MongoDB, you don't need to install PyMongo.

    # Install with support for just mongodb
    pip install pytest-server-fixtures[mongodb]

    # Install with support for mongodb and jenkins
    pip install pytest-server-fixtures[mongodb,jenkins]

    # Install with Docker support
    pip install pytest-server-fixtures[docker]

    # Install with Kubernetes support
    pip install pytest-server-fixtures[kubernetes]

    # Install with only core library and support for httpd and xvfp
    pip install pytest-server-fixtures

Enable the fixture explicitly in your tests or conftest.py (not required when using setuptools entry points):

    pytest_plugins = ['pytest_server_fixtures.httpd',
                      'pytest_server_fixtures.jenkins',
                      'pytest_server_fixtures.mongo',
                      'pytest_server_fixtures.postgres',
                      'pytest_server_fixtures.redis',
                      'pytest_server_fixtures.xvfb',
                      ]

Configuration

The fixtures are configured using the following evironment variables:

Common fixture properties

All of these fixtures follow the pattern of spinning up a server on a unique port and then killing the server and cleaning up on fixture teardown.

All test fixtures share the following properties at runtime:

MongoDB

The mongo module contains the following fixtures:

All these fixtures have the following properties:

Here's an example on how to run up one of these servers:

def test_mongo(mongo_server):
    db = mongo_server.api.mydb
    collection = db.test_coll
    test_coll.insert({'foo': 'bar'})
    assert test_coll.find_one()['foo'] == 'bar'

Postgres

The postgres module contains the following fixture:

The Postgres server fixture has the following properties:

You may wish to build another fixture on top of the session-scoped fixture; for example:

def create_full_schema(connection):
    """Create the database schema"""
    pass

@pytest.fixture(scope='session')
def db_config_sess(postgres_server_sess: PostgresServer) -> PostgresServer:
    """Returns a DbConfig pointing at a fully-created db schema"""
    server_cfg = postgres_server_sess.connection_config
    create_full_schema(postgres_server_sess.connect())
    return postgres_server_sess

Redis

The redis module contains the following fixtures:

All these fixtures have the following properties:

Here's an example on how to run up one of these servers:

def test_redis(redis_server):
    redis_server.api.set('foo': 'bar')
    assert redis_server.api.get('foo') == 'bar'

S3 Minio

The s3 module contains the following fixtures:

The S3 server has the following properties:

The S3 Bucket has the following properties:

Here's an example on how to run up one of these servers:

def test_connection(s3_bucket):
    bucket = s3_bucket.client.Bucket(s3_bucket.name)
    assert bucket is not None

Apache httpd

The httpd module contains the following fixtures:

The fixture has the following properties at runtime:

Here's an example showing some of the features of the fixture:

def test_httpd(httpd_server):
    # Log files can be accessed by the log_dir property
    assert 'access.log' in [i.basename() for i in httpd_server.log_dir.files()]

    # Files in the document_root are accessable by HTTP
    hello = httpd_server.document_root / 'hello.txt'
    hello.write_text('Hello World!')
    response = httpd_server.get('/hello.txt')
    assert response.status_code == 200
    assert response.text == 'Hello World!'

Proxy Rules

An httpd server on its own isn't super-useful, so the underlying class for the fixture has options for configuring it as a reverse proxy. Here's an example where we've pulled in a pytest-pyramid fixture and set it up to be proxied from the httpd server:

import pytest
from pytest_server_fixtures.httpd import HTTPDServer

pytest_plugins=['pytest_pyramid']

@pytest.yield_fixture()
def proxy_server(pyramid_server):

    # Configure the proxy rules as a dict of source -> dest URLs
    proxy_rules = {'/downstream/' : pyramid_server.url
                  }

    server = HTTPDServer(proxy_rules,
                         # You can also specify any arbitrary text you want to
                         # put in the config file
                         extra_cfg = 'Alias /tmp /var/tmp\n',
                         )
    server.start()
    yield server
    server.teardown()

def test_proxy(proxy_server):
    # This request will be proxied to the pyramid server
    response = proxy_server.get('/downstream/accounts')
    assert response.status_code == 200

Simple HTTP Server

The http module contains the following fixtures:

The fixture has the following properties at runtime:

Here's an example showing some of the features of the fixture:

def test_simple_server(simple_http_server):
    # Files in the document_root are accessable by HTTP
    hello = simple_http_server.document_root / 'hello.txt'
    hello.write_text('Hello World!')
    response = simple_http_server.get('/hello.txt')
    assert response.status_code == 200
    assert response.text == 'Hello World!'

Jenkins

The jenkins module contains the following fixtures:

The fixture has the following methods and properties:

Here's an example showing how to run up the server:

PLUGIN_DIR='/path/to/some/plugins'

def test_jenkins(jenkins_server):
    jenkins_server.load_plugins(PLUGIN_DIR)
    assert not jenkins_server.api.get_jobs()

Xvfb

The xvfb module contains the following fixtures:

The fixture has the following properties:

Here's an example showing how to run up the server:

def test_xvfb(xvfb_server):
    assert xvfb_server.display

Server Framework

All the included fixtures and others in this suite of plugins are built on an extensible TCP server running framework, and as such many of them share various properties and methods.

pytest_shutil.workspace.Workspace
  |
  *--base2.TestServerV2
     |
     *--mongo.MongoTestServer
     *--redis.RedisTestServer
  *--base.TestServer
     |
     *--http.HTTPTestServer
        |
        *--http.SimpleHTTPTestServer
        *--httpd.HTTPDServer
        *--jenkins.JenkinsTestServer
        *--pytest_pyramid.PyramidTestServer

Class Methods

The best way to understand the framework is look at the code, but here's a quick summary on the class methods that child classes of base.TestServer can override.

Class Attributes

At a minimum child classes must define run_cmd and check_server_up. There are also some class attributes that can be overridden to modify server behavior:

Constructor Arguments

The base class constructor also accepts these arguments:

Integration Tests

$ vagrant up
$ vagrant ssh
...
$ . venv/bin/activate
$ cd /vagrant
$ make develop
$ cd pytest-server-fixtures

# test serverclass="thread"
$ pytest

# test serverclass="docker"
$ SERVER_FIXTURES_SERVER_CLASS=docker pytest

# test serverclass="kubernetes"
$ SERVER_FIXTURES_SERVER_CLASS=kubernetes SERVER_FIXTURES_K8S_LOCAL_TEST=True pytest

Changelog

1.8.0 (2024-10-??)

• All: Drop support for Python 2 and <3.6, removing compatibility code.
• All: Use stdlib unittest.mock instead of mock package.
• All: Removed usage of path.py and path in favour of pathlib. #174 #224
• pytest-devpi-server: Run devpi-init for initialisation. #179
• pytest-server-fixtures: BREAKING CHANGE: Removed RethinkDB support, as the project is no longer maintained.
• pytest-server-fixtures: Allowed passing through HTTP headers to the server. #149
• pytest-server-fixtures: Fixed threading log debug messages. #146
• pytest-server-fixtures: Removed usage of deprecated Thread.setDaemon. #202
• pytest-server-fixtures: Explicitly close initial Mongo client. #198
• pytest-server-fixtures: Don't use context manager for CREATE DATABASE #186
• pytest-shutil: Removed contextlib2 requirement. #144
• pytest-shutil: Fixed forcing color through termcolor. #217
• pytest-shutil: Replaced deprecated imp module #219
• pytest-profiling: Added support to hide/show the full path of file. #95
• pytest-profiling: Fixed SVG file generation on Windows. #93
• pytest-profiling: Remove pinning of more-itertools. #194
• pytest-profiling: Add support to define element number for print_stats() #96
• pytest-profiling: Fix mock in test_writes_summary #223
• pytest-virtualenv: Modernised package. #188 #185 #182 #163
• pytest-virtualenv: Fixed virtualenv creation on Windows. #142
• pytest-virtualenv: Added delete_workspace parameter to VirtualEnv. #195
• pytest-virtualenv: Removed extras_require. #240
• ci: Remove usage of deprecated distutils. #189
• ci: Disabled jenkins server tests on CircleCI to improve build time.
• ci: Fixed collections import for py 3.11 compatibility #222

1.7.1 (2019-05-28)

• pytest-profiling: Fix pytest-profiling to profile fixtures. #48
• pytest-devpi-server: Fixed Python 3.4 support updating "ruamel.yaml" requirements. #138
• ci: Added PYTEST_DONT_REWRITE in order to suppress module already imported. #123

1.7.0 (2019-02-21)

• All: Support pytest >= 4.0.0
• All: Support Python 3.7
• pytest-server-fixtures: if host not defined on your machine, default to localhost
• pytest-server-fixture: Pin to rethinkdb < 2.4.0 due to upstream API changes
• pytest-verbose-parametrize: Add support for revamped marker infrastructure
• pytest-verbose-parametrize: Fix integration tests to support pytest >= 4.1.0
• pytest-virtualenv: Add virtualenv as install requirement. Fixes #122
• pytest-webdriver: Fix RemovedInPytest4Warning using getfixturevalue
• circleci: Fix checks by skipping coverall submission for developer without push access
• wheels: Generate universal wheels installable with both python 2.x and 3.x
• dist: Remove support for building and distributing *.egg files
• VagrantFile: Install python 3.7 and initialize python 3.7 by default
• Fix DeprecationWarning warnings using "logger.warning()" function

1.6.2 (2019-02-21)

• pytest-server-fixtures: suppress stacktrace if kill() is called
• pytest-server-fixtures: fix random port logic in TestServerV2

1.6.1 (2019-02-12)

• pytest-server-fixtures: fix exception when attempting to access hostname while server is not started

1.6.0 (2019-02-12)

• pytest-server-fixtures: added previously removed TestServerV2.kill() function
• pytest-profiling: pin more-itertools==5.0.0 in integration tests, as that's a PY3 only release

1.5.1 (2019-01-24)

• pytest-verbose-parametrize: fixed unicode parameters when using @pytest.mark.parametrize

1.5.0 (2019-01-23)

• pytest-server-fixtures: made postgres fixtures and its tests optional, like all other fixtures
• pytest-server-fixtures: reverted a fix for pymongo deprecation warning, as this will break compatibility with pymongo 3.6.0
• pytest-server-fixtures: dropped RHEL5 support in httpd

1.4.1 (2019-01-18)

• pytest-server-fixtures: server fixture binary path specified in ENV now only affect server class 'thread'

1.4.0 (2019-01-15)

• Fixing python 3 compatibility in Simple HTTP Server fixture
• Fixed broken tests in pytest-profiling
• Pinned pytest<4.0.0 until all deprecation warnings are fixed.
• pytest-webdriver: replaced deprecated phantomjs with headless Google Chrome.
• Add Vagrantfile to project to make test environment portable.
• Add .editorconfig file to project.
• pytest-server-fixtures: add TestServerV2 with Docker and Kubernetes support.
• pytest-server-fixtures: fix for an issue where MinioServer is not cleaned up after use.
• pytest-server-fixtures: fix deprecation warnings when calling pymongo.
• pytest-server-fixtures: close pymongo client on MongoTestServer teardown.
• pytest-server-fixtures: upgrade Mongo, Redis and RethinkDB to TestServerV2.
• coveralls: fix broken coveralls

1.3.1 (2018-06-28)

• Use pymongo list_database_names() instead of the deprecated database_names(), added pymongo>=3.6.0 dependency

1.3.0 (2017-11-17)

• Fixed workspace deletion when teardown is None
• Fixed squash of root logger in pytest-listener
• Added S3 Minio fixture (many thanks to Gavin Bisesi)
• Added Postgres fixture (many thanks to Gavin Bisesi)
• Use requests for server fixtures http gets as it handles redirects and proxies properly

1.2.12 (2017-8-1)

• Fixed regression on cacheing ephemeral hostname, some clients were relying on this. This is now optional.

1.2.11 (2017-7-21)

• Fix for OSX binding to illegal local IP range (Thanks to Gavin Bisesi)
• Setup and Py3k fixes for pytest-profiling (Thanks to xoviat)
• We no longer try and bind port 5000 when reserving a local IP host, as someone could have bound it to 0.0.0.0
• Fix for #46 sourcing gprof2dot when the local venv has not been activated

1.2.10 (2017-2-23)

• Handle custom Pytest test items in pytest-webdriver

1.2.9 (2017-2-23)

• Add username into mongo server fixture tempdir path to stop collisions on shared multiuser filesystems

1.2.8 (2017-2-21)

• Return function results in shutil.run.run_as_main

1.2.7 (2017-2-20)

• More handling for older versions of path.py
• Allow virtualenv argument passing in pytest-virtualenv

1.2.6 (2017-2-16 )

• Updated devpi server server setup for devpi-server >= 2.0
• Improvements for random port picking
• HTTPD server now binds to 0.0.0.0 by default to aid Selenium-style testing
• Updated mongodb server args for mongodb >= 3.2
• Corrections for mongodb fixture config and improve startup logic
• Added module-scoped mongodb fixture
• Handling for older versions of path.py
• Fix for #40 where tests that chdir break pytest-profiling

1.2.5 (2016-12-09)

• Improvements for server runner host and port generation, now supports random local IPs
• Bugfix for RethinkDB fixture config

1.2.4 (2016-11-14)

• Bugfix for pymongo extra dependency
• Windows compatibility fix for pytest-virtualenv (Thanks to Jean-Christophe Fillion-Robin for PR)
• Fix symlink handling for pytest-shutil.cmdline.get_real_python_executable

1.2.3 (2016-11-7)

• Improve resiliency of Mongo fixture startup checks

1.2.2 (2016-10-27)

• Python 3 compatibility across most of the modules
• Fixed deprecated Path.py imports (Thanks to Bryan Moscon)
• Fixed deprecated multicall in pytest-profiling (Thanks to Paul van der Linden for PR)
• Added devpi-server fixture to create an index per test function
• Added missing licence file
• Split up httpd server fixture config so child classes can override loaded modules easier
• Added 'preserve_sys_path' argument to TestServer base class which exports the current python sys.path to subprocesses.
• Updated httpd, redis and jenkins runtime args and paths to current Ubuntu spec
• Ignore errors when tearing down workspaces to avoid race conditions in 'shutil.rmtree' implementation

1.2.1 (2016-3-1)

• Fixed pytest-verbose-parametrize for latest version of py.test

1.2.0 (2016-2-19)

• New plugin: git repository fixture

1.1.1 (2016-2-16)

• pytest-profiling improvement: escape illegal characters in .prof files (Thanks to Aarni Koskela for the PR)

1.1.0 (2016-2-15)

• New plugin: devpi server fixture
• pytest-profiling improvement: overly-long .prof files are saved as the short hash of the test name (Thanks to Vladimir Lagunov for PR)
• Changed default behavior of workspace.run() to not use a subshell for security reasons
• Corrected virtualenv.run() method to handle arguments the same as the parent method workspace.run()
• Removed deprecated '--distribute' from virtualenv args

1.0.1 (2015-12-23)

• Packaging bugfix

1.0.0 (2015-12-21)

• Initial public release