Adding basic test configuration to tox.ini

Author: bsipocz

ignore_testing

@@ -0,0 +1,4 @@
+content/tutorial-deep-reinforcement-learning-with-pong-from-pixels.md
+content/pairing.md
+content/tutorial-style-guide.md
+content/tutorial-nlp-from-scratch.md

tox.ini

@@ -0,0 +1,38 @@
+[tox]
+envlist =
+    py{38,39,310}-test{,-oldestdeps,-devdeps,-predeps}{,-buildhtml}
+requires =
+    pip >= 19.3.1
+
+[testenv]
+
+description = run tests
+
+deps =
+    # We use these files to specify all the dependencies, and below we override
+    # versions for specific testing schenarios
+    -rsite/requirements.txt
+    -rrequirements.txt
+
+    # TODO: be clever and use the nightly wheels instead
+    devdeps: git+https://github.com/numpy/numpy.git#egg=numpy
+
+    # TODO: add the oldest supported versions of all the dependencies here
+    # oldestdeps: numpy==1.18
+    # oldestdeps: matplotlib==3.1.2
+    # oldestdeps: scipy==1.4
+
+commands =
+    pip freeze
+
+    # Ignore testing the tutorials listed in ignore_testing file
+    !buildhtml: bash -c 'find content -name "*.md" | grep -vf ignore_testing | xargs jupytext --to notebook '
+
+    !buildhtml: pytest --nbval-lax --durations=10 content/
+    buildhtml: make -C site/ SPHINXOPTS="-nWT --keep-going" html
+
+pip_pre =
+    predeps: true
+    !predeps: false
+
+skip_install = true