tox: add configuration

Author: hauntsaninja

CONTRIBUTING.md

@@ -12,6 +12,7 @@ To get started developing `boostedblob`:
 ## Running tests
 
 Run `./test.sh` to run tests.
+If you like tox, `tox` should also work.
 
 This will run tests with some hardcoded cloud locations, which you may not have access to. Instead,
 use `BBB_TEST_LOCATIONS` to tell tests what locations to use. E.g.,

test.sh

@@ -1,5 +1,7 @@
 set -ex
 
+# TODO: maybe get rid of this script in favour of tox
+
 black --diff --check --quiet .
 isort --diff --check --quiet .
 flake8

tox.ini

@@ -1,3 +1,36 @@
+[tox]
+skipsdist = True
+envlist = py37, py39, py310, lint, mypy
+
+[testenv]
+deps = pytest
+setenv = BBB_TEST_LOCATIONS = {env:BBB_TEST_LOCATIONS:az://shantanutest/container}
+allowlist_externals = bash
+commands_pre =
+    bash -c 'poetry export --dev --without-hashes -f requirements.txt | pip install --quiet --no-deps -r /dev/stdin'
+commands =
+    pytest --cov=boostedblob {posargs}
+    coverage html
+
+[testenv:lint]
+deps =
+    flake8
+    flake8-bugbear
+    black
+    isort>=5
+commands_pre =
+    bash -c 'poetry export --dev --without-hashes -f requirements.txt | pip install --quiet --no-deps -r /dev/stdin'
+commands =
+    flake8
+    black --diff --check --quiet .
+    isort --diff --check --quiet .
+
+[testenv:mypy]
+deps = mypy
+commands =
+    mypy boostedblob
+    mypy tests --disable-error-code var-annotated
+
 [flake8]
 max_line_length = 100
 ignore = E203,E501,W503