Fix sphinx.testing deprecation warning

.github/workflows/test.yml

@@ -22,13 +22,12 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip
-          cache-dependency-path: docs/requirements.txt
+          cache-dependency-path: setup.py
 
       - name: Install dependencies
         run: |
-          python -m pip install -r docs/requirements.txt
           python -m pip install -U pytest
-          python -m pip install -e .
+          python -m pip install -e .[test]
 
       - name: Test
         run: |

docs/requirements.txt

@@ -1,2 +1,2 @@
-Sphinx<7
+Sphinx
 myst-parser>=1.0.0

tests/conftest.py

@@ -1,9 +1,16 @@
+from pathlib import Path
+
 import pytest
-from sphinx.testing.path import path
+import sphinx
+from packaging.version import Version
+
 
 pytest_plugins = 'sphinx.testing.fixtures'
 
 
 @pytest.fixture(scope='session')
 def rootdir():
-    return path(__file__).parent.abspath() / 'roots'
+    if Version(sphinx.__version__) < Version('7.0.0'):
+        from sphinx.testing.path import path
+        return path(__file__).parent.abspath() / 'roots'
+    return Path(__file__).parent.absolute() / 'roots'