Add official support for Python 3.14

- enable all CI tests for Python 3.14
  (except for tests needing pyarrow)

Author: mrbean-bremen

.github/workflows/testsuite.yml

@@ -86,14 +86,12 @@ jobs:
         fi
       shell: bash
     - name: Install extra dependencies
-      if: ${{ matrix.python-version != '3.14' }}
       run: |
         pip install -r extra_requirements.txt
         pip install -r legacy_requirements.txt
         pip install zstandard cffi  # needed to test #910
       shell: bash
     - name: Run unit tests with extra packages as non-root user
-      if: ${{ matrix.python-version != '3.14' }}
       run: |
         export PYTHON_ZSTANDARD_IMPORT_POLICY=cffi  # needed to test #910
         python -m pyfakefs.tests.all_tests
@@ -115,7 +113,27 @@ jobs:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
         python-version: [3.8, 3.9, "3.10", "3.11", "3.12", "3.13"]
-        pytest-version: [6.2.5, 7.0.1, 7.4.4, 8.0.2, 8.3.4]
+        pytest-version: [6.2.5, 7.0.1, 7.4.4, 8.0.2, 8.4.2]
+        include:
+          - python-version: "3.14"
+            pytest-version: 8.4.2
+            os: ubuntu-latest
+          - python-version: "3.14"
+            pytest-version: 8.4.2
+            os: macOS-latest
+          - python-version: "3.14"
+            pytest-version: 8.4.2
+            os: windows-latest
+        exclude:
+          - python-version: "3.8"
+            pytest-version: 8.4.2
+            os: ubuntu-latest
+          - python-version: "3.8"
+            pytest-version: 8.4.2
+            os: macOS-latest
+          - python-version: "3.8"
+            pytest-version: 8.4.2
+            os: windows-latest
     steps:
       - uses: actions/checkout@v5
       - name: Set up Python ${{ matrix.python-version }}
@@ -127,9 +145,14 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install -r requirements.txt
           python -m pip install -U pytest==${{ matrix.pytest-version }}
-          python -m pip install pandas parquet pyarrow
+          python -m pip install pandas parquet
           python -m pip install -e .
         shell: bash
+      - name: Install pyarrow (not yet supported by 3.14)
+        if: ${{ matrix.python-version != '3.14' }}
+        run: |
+          python -m pip install pyarrow
+        shell: bash
       - name: Run pytest tests
         run: |
           echo "$(python -m pytest pyfakefs/pytest_tests/pytest_plugin_failing_helper.py)" > ./testresult.txt

CHANGES.md

@@ -19,6 +19,7 @@ The released versions correspond to PyPI releases.
 * the `errno` codes set in `OSError` have changed for some specific error conditions
   in Windows 11/Windows Server 2025; pyfakefs now matches this behavior
   instead of the previous behavior under Windows 10
+* added official support for Python 3.14
 
 ### Enhancements
 * added support for `os.readinto` in Python 3.14

docs/intro.rst

@@ -162,7 +162,7 @@ Continuous Integration
 ......................
 
 ``pyfakefs`` is currently automatically tested on Linux, macOS and Windows, with
-Python 3.7 to 3.13, and with PyPy3 on Linux, using
+Python 3.7 to 3.14, and with PyPy3 on Linux, using
 `GitHub Actions <https://github.com/pytest-dev/pyfakefs/actions>`__.
 
 On the command line

pyfakefs/pytest_tests/pytest_reload_pandas_test.py

@@ -2,33 +2,29 @@
 Ensures that reloading the `pandas.core.arrays.arrow.extension_types` module succeeds.
 """
 
+import sys
 from pathlib import Path
 
 import pytest
 
 try:
     import pandas as pd
-except ImportError:
-    pd = None
-
-try:
     import parquet
 except ImportError:
+    pd = None
     parquet = None
 
 
-@pytest.mark.skipif(
-    pd is None or parquet is None, reason="pandas or parquet not installed"
-)
+@pytest.mark.skipif(pd is None, reason="pandas or parquet not installed")
+@pytest.mark.skipif(sys.version_info >= (3, 14), reason="parquet not available yet")
 def test_1(fs):
     dir_ = Path(__file__).parent / "data"
     fs.add_real_directory(dir_)
     pd.read_parquet(dir_ / "test.parquet")
 
 
-@pytest.mark.skipif(
-    pd is None or parquet is None, reason="pandas or parquet not installed"
-)
+@pytest.mark.skipif(pd is None, reason="pandas or parquet not installed")
+@pytest.mark.skipif(sys.version_info >= (3, 14), reason="parquet not available yet")
 def test_2():
     dir_ = Path(__file__).parent / "data"
     pd.read_parquet(dir_ / "test.parquet")

pyproject.toml

@@ -30,6 +30,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Operating System :: POSIX",

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{37,38,39,310,311,312,313}
+    py{37,38,39,310,311,312,313,314}
     pypy{37,39,310}
 
 [testenv]