generalize the way the triplestore is set up in tests

use the "TRIPLESTORE_URL" environment variable instead of detecting the GitLab CI environment

.gitlab-ci.yml

@@ -23,7 +23,7 @@ test-job:
     - pip install --upgrade -r requirements-dev.txt
     - pip freeze
   script:
-    - pytest --cov=project --cov-report html
+    - TRIPLESTORE_URL="http://fuseki:3030/" pytest --cov=project --cov-report html
   artifacts:
     paths:
       - htmlcov

tests/conftest.py

@@ -20,11 +20,6 @@ def requests_client() -> RequestsClient:
     return RequestsClient()
 
 
-def _is_in_gitlab_ci() -> bool:
-    gitlab_ci_env_variable = os.environ.get("GITLAB_CI", None)
-    return gitlab_ci_env_variable and gitlab_ci_env_variable == "true"
-
-
 @pytest.fixture(scope="session")
 def triplestore() -> Generator[None, None, None]:
     """
@@ -33,16 +28,17 @@ def triplestore() -> Generator[None, None, None]:
     This fixture will set up a triplestore and provide its base URL by overriding the Django setting
     "DALIA_TRIPLESTORE_BASE_URL".
     """
-    if _is_in_gitlab_ci():
-        yield from _triplestore_from_gitlab_service()
+    triplestore_url_env_variable = os.environ.get("TRIPLESTORE_URL", None)
+
+    if triplestore_url_env_variable:
+        yield from _triplestore_from_custom_url(triplestore_url_env_variable)
     else:
         yield from _triplestore_from_testcontainer()
 
 
-# Uses the triplestore provided by GitLab's services (see https://docs.gitlab.com/ee/ci/services/).
-def _triplestore_from_gitlab_service() -> Generator[None, None, None]:
+def _triplestore_from_custom_url(triplestore_url: str) -> Generator[None, None, None]:
     # alter Django settings
-    settings.DALIA_TRIPLESTORE_BASE_URL = "http://fuseki:3030/"
+    settings.DALIA_TRIPLESTORE_BASE_URL = triplestore_url
 
     yield