Initial Commit

frontend/test/fuel-logs/useFuelGrades.test.tsx

@@ -0,0 +1,20 @@
+import { renderHook, waitFor } from '@testing-library/react';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { useFuelGrades } from '../../src/features/fuel-logs/hooks/useFuelGrades';
+import * as api from '../../src/features/fuel-logs/api/fuel-logs.api';
+
+const qc = new QueryClient();
+
+jest.spyOn(api.fuelLogsApi, 'getFuelGrades').mockResolvedValue([
+  { value: '87', label: '87 (Regular)' },
+  { value: '91', label: '91 (Premium)' },
+]);
+
+describe('useFuelGrades', () => {
+  it('returns grades for gasoline', async () => {
+    const wrapper = ({ children }: any) => <QueryClientProvider client={qc}>{children}</QueryClientProvider>;
+    const { result } = renderHook(() => useFuelGrades('gasoline' as any), { wrapper });
+    await waitFor(() => expect(result.current.fuelGrades.length).toBeGreaterThan(0));
+  });
+});
+