I am sending data along with a vue in Laravel 9 with Inertia Vue 3 app. Here is the code in controller function.

public function index() {
    $sliders = Slider::all();
    return Inertia::render('Admin/Slider/Index', [ 'sliders' => $sliders]);
  }

Inside the test file, I am testing if $sliders count is equal. Check the following code:

public function test_render_slider_management_view_has_all_sliders() {

    $user = User::factory()->create(['role' => 1]);
    $random_sliders = Slider::factory()->count(5)->create();
    $response = $this->actingAs($user)->get(app()->getLocale().'/admin/sliders');

    $response->assertViewHas('sliders', function ($sliders) {
      return count((array)$sliders) == 5;
    });
  }

This test gives a generic error of Failed asserting that false is true.. Upon checking $sliders variable in the closure, its value is null.