This package provides a plugin for the pytest framework that allows developers to control unit tests that require access to data from the internet. It was originally part of the astropy core package, but has been moved to a separate package in order to be of more general use.
Many software packages provide features that require access to data from the internet. These features need to be tested, but unit tests that access the internet can dominate the overall runtime of a test suite.
pytest-remotedata plugin allows developers to indicate which unit tests
require access to the internet, and to control when and whether such tests
should execute as part of any given run of the test suite.
pytest-remotedata plugin can be installed using
$ pip install pytest-remotedata
It is also possible to install the latest development version from the source repository:
$ git clone https://github.com/astropy/pytest-remotedata $ cd pytest-remotedata $ python ./setup.py install
In either case, the plugin will automatically be registered for use with
Installing this plugin makes two decorators available for use with
remote_datafor marking tests that require data from the internet
internet_offfor marking tests that should run only when internet access is disabled
These decorators can be used to mark test functions, methods, and classes using
@pytest.mark. For example, consider the following test function that
requires access to data from the internet:
import pytest from urllib.request import urlopen @pytest.mark.remote_data def test_remote_data(): urlopen('https://astropy.org')
test_remote_data function with
pytest that this test should be run only when access to remote
data sources is explicitly requested.
When this plugin is installed, the
--remote-data command line option is
added to the
pytest command line interface.
The default behavior is to skip tests that are marked with
--remote-data option is not provided to the
pytest command, or
--remote-data=none is provided, all tests that are marked with
remote_data will be skipped. All tests that are marked with
internet_off will be executed.
Sometimes it is useful to check that certain tests do not unexpectedly access
the internet. Strict remote data access checking can be enabled by setting
remote_data_strict = true in the tested package's
setup.cfg file. If
this option is enabled, any test that attempts to access the network but is not
@pytest.mark.remote_data will fail.
Providing either the
--remote-data option, or
--remote-data=any to the
pytest command line interface will cause all tests that are marked with
remote-data to execute. Any tests that are marked with
will be skipped.
Running the tests with
--remote-data=astropy will cause only tests that
receive remote data from Astropy data sources to be run. Tests with any other
data sources will be skipped. This is indicated in the test code by marking
test functions with
In the future, we intend to support a configurable way to indicate specific
remote data sources in addition to
Questions, bug reports, and feature requests can be submitted on github.
This plugin is licensed under a 3-clause BSD style license - see the