Return error status

backend/tests/test_api.py

@@ -14,6 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+import requests
 from fastapi.testclient import TestClient
 
 from app.main import app
@@ -106,3 +107,16 @@ def test_build_history(monkeypatch):
     assert second["status"] == "running"
     assert second["duration_seconds"] == 1
     assert second["commits"] == []
+
+
+def test_build_history_error_returns_empty(monkeypatch):
+    def raise_error(limit=5):
+        raise requests.RequestException("boom")
+
+    monkeypatch.setattr("app.services.builds.fetch_builds", raise_error)
+
+    response = client.get("/builds")
+    assert response.status_code == 503
+    body = response.json()
+    assert body["builds"] == []
+    assert body["error"] == "jenkins_unavailable"