make build test build explicit

Author: cvanelteren

.github/workflows/build.yml

@@ -95,8 +95,12 @@ jobs:
         with:
           package-dir: "packages/basemap"
           output-dir: "packages/basemap/dist"
+
       - name: Run unittests
-        run: pytest packages/basemap/
+        run: |
+          python -m pip install -e "packages/basemap[test]"
+          cd packages/basemap
+          python -m pytest
 
       - uses: actions/upload-artifact@v4
         with:

packages/basemap/pyproject.toml

@@ -4,6 +4,9 @@ requires = [
     'wheel',
     'numpy == 2.0.0',
     'cython >= 0.29.31, < 3.1',
-    'pytest'
 ]
 build-backend = "setuptools.build_meta"
+[tool.setuptools.extras_require]
+test = [
+    "pytest"
+]