Function setupScenario

packages/router-core/tests/load.test.ts:1174–1277

({
      throwAtIndex,
      parentFailures,
      beforeLoadNotFoundFactory,
      withDefaultNotFoundComponent,
    }: {
      throwAtIndex: ThrowAtIndex
      parentFailures: ParentFailureMap
      beforeLoadNotFoundFactory?: Scenario['beforeLoadNotFoundFactory']
      withDefaultNotFoundComponent?: boolean
    })

    }

    const setupScenario = ({
      throwAtIndex,
      parentFailures,
      beforeLoadNotFoundFactory,
      withDefaultNotFoundComponent,
    }: {
      throwAtIndex: ThrowAtIndex
      parentFailures: ParentFailureMap
      beforeLoadNotFoundFactory?: Scenario['beforeLoadNotFoundFactory']
      withDefaultNotFoundComponent?: boolean
    }) => {
      const makeHead = (label: string) =>
        vi.fn(() => ({ meta: [{ title: label }] }))

      const makeLoader = (index: number) =>
        vi.fn(() => {
          const failure = parentFailures[index as 0 | 1 | 2]
          if (failure === 'notFound') {
            throw notFound({ data: { source: `loader-${index}` } })
          }
          if (failure === 'redirect') {
            throw redirect({ to: '/redirect-target' })
          }
          return { level: index }
        })

      const rootRoute = new BaseRootRoute({
        loader: makeLoader(0),
        head: makeHead('Root'),
      })

      const level1Route = new BaseRoute({
        getParentRoute: () => rootRoute,
        path: '/level-1',
        loader: makeLoader(1),
        head: makeHead('Level 1'),
      })

      const level2Route = new BaseRoute({
        getParentRoute: () => level1Route,
        path: '/level-2',
        loader: makeLoader(2),
        head: makeHead('Level 2'),
      })

      const level3Route = new BaseRoute({
        getParentRoute: () => level2Route,
        path: '/level-3',
        loader: makeLoader(3),
        head: makeHead('Level 3'),
      })

      const redirectTargetRoute = new BaseRoute({
        getParentRoute: () => rootRoute,
        path: '/redirect-target',
      })

      const routeTree = rootRoute.addChildren([