🐍 Ensure support for Python 3.12/3.8/3.7

The README claims that Python 3.7 or higher is required,
so I believe it would be nice to ensure that all 3.7+
versions are actually supported by enabling testing
against them on CI.

These changes also:
  - add coverage reporting
  - disable the fail-fast mode for tests
  - make CI use pipx to install poetry
  - make CI use pytest to run tests
  - force colors on CI
  - bump actions/checkout to v4
  - bump actions/setup-python to v5

.github/workflows/codeql-analysis.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can check out the head.

.github/workflows/test.yml

@@ -14,22 +14,34 @@ on:
       - ".github/workflows/test.yml"
       - "**.py"
 
+env:
+  FORCE_COLOR: '1'
+
 jobs:
   test:
     strategy:
+      fail-fast: false
       matrix:
-        python: ["3.9", "3.10", "3.11"]
+        python:
+          - "3.12"
+          - "3.11"
+          - "3.10"
+          - "3.9"
+          - "3.8"
+          - "3.7"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python }}
       - name: Setup Graphviz
         uses: ts-graphviz/setup-graphviz@v1
       - name: Install poetry
-        run: curl -sSL https://install.python-poetry.org | python3 -
-      - name: Run all tests
         run: |
-          poetry install
-          poetry run python -m unittest -v tests/*.py
+          pipx install poetry
+          poetry env use ${{ matrix.python }}
+      - name: Install dependencies
+        run: poetry install
+      - name: Run all tests
+        run: poetry run pytest

poetry.lock

@@ -1,10 +1,9 @@
-# This file is automatically @generated by Poetry and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.7.1 and should not be changed by hand.
 
 [[package]]
 name = "astroid"
 version = "2.9.0"
 description = "An abstract syntax tree for Python with inference support."
-category = "dev"
 optional = false
 python-versions = "~=3.6"
 files = [
@@ -23,7 +22,6 @@ wrapt = ">=1.11,<1.14"
 name = "black"
 version = "22.12.0"
 description = "The uncompromising code formatter."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -60,7 +58,6 @@ uvloop = ["uvloop (>=0.15.2)"]
 name = "click"
 version = "8.1.3"
 description = "Composable command line interface toolkit"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -76,7 +73,6 @@ importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
 name = "colorama"
 version = "0.4.3"
 description = "Cross-platform colored terminal text."
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 files = [
@@ -85,10 +81,84 @@ files = [
 ]
 
 [[package]]
+name = "coverage"
+version = "7.2.7"
+description = "Code coverage measurement for Python"
+optional = false
+python-versions = ">=3.7"
+files = [
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+    {file = "coverage-7.2.7-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:6d040ef7c9859bb11dfeb056ff5b3872436e3b5e401817d87a31e1750b9ae2fb"},
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+    {file = "coverage-7.2.7-pp37.pp38.pp39-none-any.whl", hash = "sha256:b7b4c971f05e6ae490fef852c218b0e79d4e52f79ef0c8475566584a8fb3e01d"},
+    {file = "coverage-7.2.7.tar.gz", hash = "sha256:924d94291ca674905fe9481f12294eb11f2d3d3fd1adb20314ba89e94f44ed59"},
+]
+
+[package.dependencies]
+tomli = {version = "*", optional = true, markers = "python_full_version <= \"3.11.0a6\" and extra == \"toml\""}
+
+[package.extras]
+toml = ["tomli"]
+
+[[package]]
 name = "exceptiongroup"
 version = "1.1.0"
 description = "Backport of PEP 654 (exception groups)"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -103,7 +173,6 @@ test = ["pytest (>=6)"]
 name = "graphviz"
 version = "0.20.1"
 description = "Simple Python interface for Graphviz"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -120,7 +189,6 @@ test = ["coverage", "mock (>=4)", "pytest (>=7)", "pytest-cov", "pytest-mock (>=
 name = "importlib-metadata"
 version = "1.5.0"
 description = "Read metadata from Python packages"
-category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 files = [
@@ -139,7 +207,6 @@ testing = ["importlib-resources", "packaging"]
 name = "iniconfig"
 version = "1.1.1"
 description = "iniconfig: brain-dead simple config-ini parsing"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -151,7 +218,6 @@ files = [
 name = "isort"
 version = "4.3.21"
 description = "A Python utility / library to sort Python imports."
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -169,7 +235,6 @@ xdg-home = ["appdirs (>=1.4.0)"]
 name = "jinja2"
 version = "3.1.2"
 description = "A very fast and expressive template engine."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -187,7 +252,6 @@ i18n = ["Babel (>=2.7)"]
 name = "lazy-object-proxy"
 version = "1.4.3"
 description = "A fast and thorough lazy object proxy."
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -218,7 +282,6 @@ files = [
 name = "markupsafe"
 version = "2.0.1"
 description = "Safely add untrusted strings to HTML/XML markup."
-category = "main"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -297,7 +360,6 @@ files = [
 name = "mccabe"
 version = "0.6.1"
 description = "McCabe checker, plugin for flake8"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -309,7 +371,6 @@ files = [
 name = "mypy-extensions"
 version = "0.4.3"
 description = "Experimental type system extensions for programs checked with the mypy typechecker."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -321,7 +382,6 @@ files = [
 name = "packaging"
 version = "20.8"
 description = "Core utilities for Python packages"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -336,7 +396,6 @@ pyparsing = ">=2.0.2"
 name = "pathspec"
 version = "0.10.1"
 description = "Utility library for gitignore style pattern matching of file paths."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -348,7 +407,6 @@ files = [
 name = "platformdirs"
 version = "2.4.0"
 description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -364,7 +422,6 @@ test = ["appdirs (==1.4.4)", "pytest (>=6)", "pytest-cov (>=2.7)", "pytest-mock
 name = "pluggy"
 version = "0.13.1"
 description = "plugin and hook calling mechanisms for python"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
@@ -382,7 +439,6 @@ dev = ["pre-commit", "tox"]
 name = "pylint"
 version = "2.12.0"
 description = "python code static checker"
-category = "dev"
 optional = false
 python-versions = "~=3.6"
 files = [
@@ -403,7 +459,6 @@ typing-extensions = {version = ">=3.10.0", markers = "python_version < \"3.10\""
 name = "pyparsing"
 version = "2.4.7"
 description = "Python parsing module"
-category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
@@ -415,7 +470,6 @@ files = [
 name = "pytest"
 version = "7.3.0"
 description = "pytest: simple powerful testing with Python"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -436,10 +490,27 @@ tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
 testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
 
 [[package]]
+name = "pytest-cov"
+version = "4.1.0"
+description = "Pytest plugin for measuring coverage."
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "pytest-cov-4.1.0.tar.gz", hash = "sha256:3904b13dfbfec47f003b8e77fd5b589cd11904a21ddf1ab38a64f204d6a10ef6"},
+    {file = "pytest_cov-4.1.0-py3-none-any.whl", hash = "sha256:6ba70b9e97e69fcc3fb45bfeab2d0a138fb65c4d0d6a41ef33983ad114be8c3a"},
+]
+
+[package.dependencies]
+coverage = {version = ">=5.2.1", extras = ["toml"]}
+pytest = ">=4.6"
+
+[package.extras]
+testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtualenv"]
+
+[[package]]
 name = "rope"
 version = "0.14.0"
 description = "a python refactoring library..."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -452,7 +523,6 @@ files = [
 name = "setuptools"
 version = "59.6.0"
 description = "Easily download, build, install, upgrade, and uninstall Python packages"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -468,7 +538,6 @@ testing = ["flake8-2020", "jaraco.envs (>=2.2)", "jaraco.path (>=3.2.0)", "mock"
 name = "toml"
 version = "0.10.0"
 description = "Python Library for Tom's Obvious, Minimal Language"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -480,7 +549,6 @@ files = [
 name = "tomli"
 version = "1.2.3"
 description = "A lil' TOML parser"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -492,7 +560,6 @@ files = [
 name = "typed-ast"
 version = "1.5.4"
 description = "a fork of Python 2 and 3 ast modules with type comment support"
-category = "main"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -526,7 +593,6 @@ files = [
 name = "typing-extensions"
 version = "4.1.1"
 description = "Backported and Experimental Type Hints for Python 3.6+"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -538,7 +604,6 @@ files = [
 name = "wrapt"
 version = "1.11.2"
 description = "Module for decorators, wrappers and monkey patching."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -549,7 +614,6 @@ files = [
 name = "zipp"
 version = "3.1.0"
 description = "Backport of pathlib-compatible object wrapper for zip files"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -564,4 +628,4 @@ testing = ["func-timeout", "jaraco.itertools"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.7"
-content-hash = "5c2b82d1c8a6a283f63558fc693271f42fdcaeab73616713eb9b38b0b59787fc"
+content-hash = "c82d7682b71e05a1907bec29e3bb1c6892fb8d40e5f9072dc9a145799e930a7a"

pyproject.toml

@@ -17,6 +17,7 @@ typed-ast = "^1.5.4"
 
 [tool.poetry.dev-dependencies]
 pytest = "^7.3"
+pytest-cov = "^4.1.0"
 pylint = "^2.7"
 rope = "^0.14.0"
 isort = "^4.3"
@@ -24,3 +25,7 @@ black = "^22.12.0"
 
 [tool.black]
 line-length = 120
+
+[tool.pytest.ini_options]
+addopts = "--cov diagrams --cov-branch -v"
+testpaths = ["tests"]