CI: installing the minimal versions of the dependencies in the test p…

…ipeline, to ensure that they remain compatible (#1320)

.github/workflows/continuous-integration-workflow.yml

@@ -70,6 +70,14 @@ jobs:
           grep -IRF generate=True test/ && exit 1
           # Executing all tests:
           pytest -vv --trace-memory-usage
+      - name: Running tests with the minimal versions of fpdf2 direct dependencies ☑
+        if: matrix.python-version == '3.8' && matrix.platform == 'ubuntu-latest'
+        run: |
+          # We ensure that those minimal versions remain compatible:
+          sed -i '/install_requires/,/\n/s/>=/==/' setup.cfg
+          pip install .
+          # Targetting only a subset of tests because: A) it's faster and B) some tests are dependant on a specific version of fonttools or Pillow
+          pytest -vv test/barcodes test/drawing test/errors test/image/test_load_image.py test/metadata test/shapes test/signing test/text_region test/utils
       - name: Uploading coverage report to codecov.io ☑
         if: matrix.python-version == '3.12' && matrix.platform == 'ubuntu-latest'
         run: bash <(curl -s https://codecov.io/bash)

setup.cfg

@@ -38,13 +38,13 @@ keywords =
 [options]
 packages =
   fpdf
+python_requires = >=3.7
 install_requires =
   defusedxml
   Pillow>=6.2.2,!=9.2.*  # minimum version tested there: https://github.com/py-pdf/fpdf2/actions/runs/2295868575
   # Version 9.2.0 is excluded due to DoS vulnerability with TIFF images: https://github.com/py-pdf/fpdf2/issues/628
   # Version exclusion explained here: https://devpress.csdn.net/python/630462c0c67703293080c302.html
   fonttools>=4.34.0
-python_requires = >=3.7
 
 [bdist_wheel]
 universal = 1