Include test fixtures (via package data) in artefacts

Enable installing package data in order to install the test fixture.
This is necessary to fix test failures when running tests from sdist
or the installed package:

FAILED pyfakefs/tests/patched_packages_test.py::TestPatchedPackages::test_read_excel - FileNotFoundError: [Errno 2] No such file or directory: '/tmp/portage/dev-python/pyfakefs-5.2.1/work/pyfakefs-5.2.1/pyfakefs/tests...

2 files changed, 7 insertions, 0 deletions

diff --git a/CHANGES.md b/CHANGES.md
index fc8bfd6..4278df7 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,12 @@
 # pyfakefs Release Notes
 The released versions correspond to PyPI releases.
 
+## Unreleased
+
+### Fixes
+* The test fixture is now included in the source distribution and installed
+  with the package.
+
 ## [Version 5.2.1](https://pypi.python.org/pypi/pyfakefs/5.2.1) (2023-04-11)
 Support for latest Python 3.12 version.
 
diff --git a/setup.cfg b/setup.cfg
index 04fd295..b73371a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -52,6 +52,7 @@ packages = find:
 install_requires =
 python_requires = >=3.7
 test_suite = pyfakefs.tests
+include_package_data = True
 
 [options.packages.find]
 exclude = docs