Function mockFetch

src/node/services/copilotOauthService.test.ts:49–57

(
  fn: (input: string | URL, init?: RequestInit) => Response | Promise<Response>
)

// Helper to mock globalThis.fetch without needing the `preconnect` property.
function mockFetch(
  fn: (input: string | URL, init?: RequestInit) => Response | Promise<Response>
): void {
  globalThis.fetch = Object.assign(fn, {
    preconnect: (_url: string | URL) => {
      // no-op in tests
    },
  }) as typeof fetch;
}

// ---------------------------------------------------------------------------
// Mock dependencies