factorize tests

.gitlab-ci.yml

-image: docker:latest
-
-stages:
-  - test
-
-test37:
+test:
   stage: test
-  image: python:3.7
+  image: python:$PYTHON_VERSION
   script:
-    - pip install "django==${DJANGO_VERSION}.*"
+    - pip install "django~=${DJANGO_VERSION}" --upgrade
     - pip install -r requirements.txt
     - coverage run --source='basetheme_bootstrap' manage.py test && coverage report  -m
   parallel:
     matrix:
-      - DJANGO_VERSION: ['3.2']
-
-test38:
-  stage: test
-  image: python:3.8
-  script:
-    - pip install "django==${DJANGO_VERSION}.*"
-    - pip install -r requirements.txt
-    - coverage run --source='basetheme_bootstrap' manage.py test && coverage report  -m
-  parallel:
-    matrix:
-      - DJANGO_VERSION: ['3.2', '4.0']
-
-test39:
-  stage: test
-  image: python:3.9
-  script:
-    - pip install "django==${DJANGO_VERSION}.*"
-    - pip install -r requirements.txt
-    - coverage run --source='basetheme_bootstrap' manage.py test && coverage report  -m
-  parallel:
-    matrix:
-      - DJANGO_VERSION: ['3.2', '4.0', '4.1']
-
-test310:
-  stage: test
-  image: python:3.10
-  script:
-    - pip install "django==${DJANGO_VERSION}.*"
-    - pip install -r requirements.txt
-    - coverage run --source='basetheme_bootstrap' manage.py test && coverage report  -m
-  parallel:
-    matrix:
-      - DJANGO_VERSION: ['3.2', '4.0', '4.1']
-
-
-testrc:
-  allow_failure: true
-  stage: test
-  image: python:rc
-  script:
-    - pip install "django==${DJANGO_VERSION}.*"
-    - pip install -r requirements.txt
-    - coverage run --source='basetheme_bootstrap' manage.py test && coverage report  -m
-  parallel:
-    matrix:
-      - DJANGO_VERSION: ['3.2', '4.0', '4.1']
+      - PYTHON_VERSION: ['3.7-slim', ]
+        DJANGO_VERSION: ['3.2', ]
+      - PYTHON_VERSION: ['3.8-slim', '3.9-slim', ]
+        DJANGO_VERSION: ['3.2', '4.2', ]
+      - PYTHON_VERSION: ['3.10-slim', ]
+        DJANGO_VERSION: ['5.0', 'latest', ]
+      - PYTHON_VERSION: ['rc', ]
+        DJANGO_VERSION: ['latest', ]
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