mockHttpClientRequestOnce
Only the next httpClient.request is mocked; the stub is not tied to a specific URL — the first matching call wins. If many endpoints share one client, prefer the mockEndpointRequest* helpers for clearer scoping.
Restore the spy in afterEach when you are finished.
Example — only the next request:
ts
mockHttpClientRequestOnce(httpClient, { success: { id: 1 } });
// this call is mocked:
await httpClient.request({ path: '/x', method: 'GET', format: 'json' });
// following calls use the real client again