check secret

Author: lukaszsocha2

.github/workflows/unit-tests.yml

@@ -43,7 +43,16 @@ jobs:
             echo "$FILE exists and has size $(stat -c%s "$FILE")"
             head -n 20 "$FILE"
           fi
-
+      - name: Check secret
+        run: |
+          if [ -z "${COVERALLS_REPO_TOKEN}" ]; then
+            echo "COVERALLS_REPO_TOKEN is not set!"
+            exit 1
+          else
+            echo "COVERALLS_REPO_TOKEN is available"
+          fi
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
       - name: Upload coverage to Coveralls
         if: success()
         env: