Add support for Python 3.12. (#434)

Author: tobiasraabe

.github/workflows/main.yml

@@ -27,22 +27,24 @@ jobs:
       fail-fast: false
       matrix:
         os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
 
     steps:
       - uses: actions/checkout@v4
-      - uses: mamba-org/setup-micromamba@v1
+      - uses: actions/setup-python@v4
         with:
-          environment-name: gha-testing
-          condarc: |
-            channels:
-              - nodefaults
-              - conda-forge
-          create-args: >-
-            python=${{ matrix.python-version }}
-            mamba
-            tox-conda
-          cache-environment: true
+          python-version: ${{ matrix.python-version }}
+          cache: pip
+          allow-prereleases: true
+      - run: pip install tox
+
+      - if: matrix.os == 'ubunut-latest'
+        run: |
+          sudo apt-get update
+          sudo apt-get install graphviz graphviz-dev
+
+      - if: matrix.os == 'macos-latest'
+        run: brew install graphviz
 
       # Unit, integration, and end-to-end tests.
 

tox.ini

@@ -1,14 +1,15 @@
 [tox]
-envlist = pytest, sphinx
+envlist = pytest
 
 [testenv]
 usedevelop = true
+platform =
+    linux: linux
+    macos: darwin
+    windows: win32
 
 [testenv:pytest]
-conda_channels =
-    conda-forge
-    nodefaults
-conda_deps =
+deps =
     # pytest
     pytest
     pytest-cov
@@ -27,9 +28,8 @@ conda_deps =
     tomli >=1.0.0
 
     # Optional and test dependencies
-    graphviz
     pexpect
-    pygraphviz
+    linux, macos: pygraphviz
 
 commands =
     pytest {posargs}