Revise tox configuration (#375)

This repositions tox as the "source of truth" for all development and CI
actions.

To support this, lint and test requirements have been split into
separate sets of requirements, and a consolidated 'lint' environment now
runs all of our lint checks. This is also used by CI.

1 files changed, 19 insertions, 28 deletions

diff --git a/tox.ini b/tox.ini
index 8cdb1d2..388c35a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,47 +1,38 @@
 [tox]
-envlist = py37, py38, py39, py310, pypy3, flake8, black, integration
-skip_missing_interpreters = True
-# Automatic envs (pyXX) will only use the python version appropriate to that
-# env and ignore basepython inherited from [testenv] if we set
-# ignore_basepython_conflict.
-ignore_basepython_conflict = True
+envlist =
+    py37,
+    py38,
+    py39,
+    py310,
+    pypy3,
+    docs,
+    lint,
+    venv,
+skip_missing_interpreters = true
 
 [gh-actions]
 python =
     pypy-3.7: pypy3
 
 [testenv]
-basepython = python3
-setenv =
-    PYTHONPATH = {toxinidir}
+description = run tests with {basepython}
 deps = -r{toxinidir}/test-requirements.txt
+skip_install = True
 commands =
-    pip install -e .
-    py.test {posargs:pymemcache/test/}
+    python -m pytest {posargs}
 
-[testenv:integration]
-commands =
-    pip install -e .
-    py.test {posargs:pymemcache/test/ -m integration}
-
-[testenv:flake8]
-# Avoid pulling all the base requirements only to run flake8
-deps = flake8
+[testenv:lint]
+description = lint source code
+deps = -r{toxinidir}/lint-requirements.txt
 commands =
+    python setup.py check --metadata --restructuredtext --strict
     flake8
-    python setup.py check --restructuredtext
-
-[testenv:black]
-commands =
     black --check .
 
-[testenv:coverage]
-commands =
-    py.test --cov=pymemcache
-
 [testenv:docs]
+description = invoke sphinx-build to build the HTML docs
+deps = -r{toxinidir}/docs-requirements.txt
 commands =
-    pip install -r docs-requirements.txt
     sphinx-build -b html docs/ docs/_build/html
 
 [testenv:venv]