tox.ini

# Tox (https://tox.readthedocs.io) is a tool for running tests
# in multiple virtualenvs.  This configuration file will run the tornado
# test suite on all supported python versions.  To use it, "pip install tox"
# and then run "tox" from this directory.
#
# This configuration requires tox 1.8 or higher.
#
# Installation tips:
# When building pycurl on my macports-based setup, I need to either set the
# environment variable ARCHFLAGS='-arch x86_64' or use
# 'port install curl +universal' to get both 32- and 64-bit versions of
# libcurl.
[tox]
# When tox is run from a venv (instead of a virtualenv), it can get confused
# unless tox-venv is also installed.
requires = tox-venv
envlist =
        # Basic configurations: Run the tests for each python version.
        py35-full,py36-full,py37-full,py38-full,pypy3-full

        # Build and test the docs with sphinx.
        docs

        # Run the linters.
        lint

# Allow shell commands in tests
whitelist_externals = /bin/sh

[testenv]
basepython =
           py3: python3
           py35: python3.5
           py36: python3.6
           py37: python3.7
           py38: python3.8
           pypy3: pypy3
           # In theory, it doesn't matter which python version is used here.
           # In practice, things like changes to the ast module can alter
           # the outputs of the tools (especially where exactly the
           # linter warning-supression comments go), so we specify a
           # python version for these builds.
           docs: python3.8
           lint: python3.8

deps =
     full: pycurl
     full: twisted
     full: pycares
     docs: -r{toxinidir}/docs/requirements.txt
     lint: flake8
     lint: black==19.10b0
     lint: mypy==0.740

setenv =
       # Treat the extension as mandatory in testing (but not on pypy)
       {py3,py36,py37,py38}: TORNADO_EXTENSION=1
       # CI workers are often overloaded and can cause our tests to exceed
       # the default timeout of 5s.
       ASYNC_TEST_TIMEOUT=15
       # Treat warnings as errors by default. We have a whitelist of
       # allowed warnings in runtests.py, but we want to be strict
       # about any import-time warnings before that setup code is
       # reached. Note that syntax warnings are only reported in
       # -opt builds because regular builds reuse pycs created
       # during sdist installation (and it doesn't seem to be
       # possible to set environment variables during that phase of
       # tox).
       # ResourceWarnings are too noisy on py35 so don't enable 
       # warnings-as-errors there.
       {py3,py36,py37,py38,pypy3}: PYTHONWARNINGS=error:::tornado


# All non-comment lines but the last must end in a backslash.
# Tox filters line-by-line based on the environment name.
commands =
         # py3*: -b turns on an extra warning when calling
         # str(bytes), and -bb makes it an error.
         python -bb -m tornado.test {posargs:}
         # Python's optimized mode disables the assert statement, so
         # run the tests in this mode to ensure we haven't fallen into
         # the trap of relying on an assertion's side effects or using
         # them for things that should be runtime errors.
         full: python -O -m tornado.test
         # In python 3, opening files in text mode uses a
         # system-dependent encoding by default.  Run the tests with "C"
         # (ascii) and "utf-8" locales to ensure we don't have hidden
         # dependencies on this setting.
         full: sh -c 'LANG=C python -m tornado.test'
         full: sh -c 'LANG=en_US.utf-8 python -m tornado.test'
         # Note that httpclient_test is always run with both client
         # implementations; this flag controls which client all the
         # other tests use.
         full: python -m tornado.test --httpclient=tornado.curl_httpclient.CurlAsyncHTTPClient
         full: python -m tornado.test --resolver=tornado.platform.caresresolver.CaresResolver
         # Run the tests once from the source directory to detect issues
         # involving relative __file__ paths; see
         # https://github.com/tornadoweb/tornado/issues/1780
         full: sh -c '(cd {toxinidir} && unset TORNADO_EXTENSION && python -m tornado.test)'


# python will import relative to the current working directory by default,
# so cd into the tox working directory to avoid picking up the working
# copy of the files (especially important for the speedups module).
changedir = {toxworkdir}

# tox 1.6 passes --pre to pip by default, which currently has problems
# installing pycurl (https://github.com/pypa/pip/issues/1405).
# Remove it (it's not a part of {opts}) to only install real releases.
install_command = pip install {opts} {packages}

[testenv:docs]
changedir = docs
# For some reason the extension fails to load in this configuration,
# but it's not really needed for docs anyway.
setenv = TORNADO_EXTENSION=0
commands =
    # Build the docs
    sphinx-build -q -E -n -W -b html . {envtmpdir}/html
    # Run the doctests. No -W for doctests because that disallows tests
    # with empty output.
    sphinx-build -q -E -n -b doctest . {envtmpdir}/doctest

[testenv:lint]
commands =
         flake8 {posargs:}
         black --check --diff {posargs:tornado demos}
         mypy {posargs:tornado}
changedir = {toxinidir}