Fix upload coverage step (baserow#4126)

Author: bram2w

.github/workflows/ci.yml

@@ -846,24 +846,35 @@ jobs:
         run: |
           echo "Listing downloaded files:"
           find reports-download -type f
-          cp reports-download/.coverage* . 2>/dev/null || echo "No coverage files found"
-          coverage combine
-          coverage report
+          cp reports-download/.coverage* $GITHUB_WORKSPACE/ 2>/dev/null || echo "No coverage files found"
+          cd $GITHUB_WORKSPACE
+          coverage combine || echo "::warning::No coverage data to combine"
+          coverage report || echo "::warning::No coverage report generated"
+          ls -la .coverage* || true
+
+      - name: Verify .coverage file exists
+        run: |
+          if [ ! -f $GITHUB_WORKSPACE/.coverage ]; then
+            echo "::error::No .coverage file found after combining coverage!"
+            exit 1
+          fi
 
       - name: Upload combined coverage report
         uses: actions/upload-artifact@v4
         with:
           name: backend-coverage-report
-          path: .coverage
+          path: ${{ github.workspace }}/.coverage
+          include-hidden-files: true
           retention-days: 30
           overwrite: true
 
       - name: Comment coverage report on PR
-        uses: py-cov-action/python-coverage-comment-action@v3
         if: github.event_name == 'pull_request'
+        uses: py-cov-action/python-coverage-comment-action@v3.38
         with:
           GITHUB_TOKEN: ${{ github.token }}
           MERGE_COVERAGE_FILES: false
+          COVERAGE_PATH: ${{ github.workspace }}
 
   # ==========================================================================
   # Build and publish stage - builds production grade images and publishes

backend/tests/baserow/contrib/integrations/local_baserow/test_utils.py

@@ -391,7 +391,16 @@ def test_prepare_file_for_db_with_existing_file(data_fixture):
 
 
 @pytest.mark.django_db
+@responses.activate
 def test_prepare_file_for_db_with_mix(data_fixture, fake):
+    picsum_url = "https://picsum.photos/300/200"
+    responses.add(
+        responses.GET,
+        picsum_url,
+        status=200,
+        body=fake.image((300, 200)),
+    )
+
     user = data_fixture.create_user()
     user_file = data_fixture.create_user_file(
         original_name=f"a.txt",
@@ -407,7 +416,7 @@ def test_prepare_file_for_db_with_mix(data_fixture, fake):
         {
             "__file__": True,
             "name": "filename",
-            "url": "https://picsum.photos/300/200",
+            "url": picsum_url,
         },
         {
             "__file__": True,
@@ -432,7 +441,7 @@ def test_prepare_file_for_db_with_mix(data_fixture, fake):
             "image_height": 200,
             "image_width": 300,
             "is_image": True,
-            "mime_type": "image/jpeg",
+            "mime_type": "image/png",
             "name": AnyStr(),
             "size": AnyInt(),
             "uploaded_at": AnyStr(),