测试laravel路径时，视图中的静默未定义变量

Question

I have a deliverypoint resource in my laravel project. The controller code associated to the route deliverypoints.index is straightforward:

public function index()
{
    return view('deliverypoints.index', [
        'deliverypoints' => DeliveryPoint::all(),
    ]);
}

With the view deliverypoints.index:

@extends('layouts.app')

@section('content')
<div class="container">
  <ul class="row">
    @foreach ($deliverypoints as $deliverypoint)
      <li class="col-12">{{ $deliveryPoint->id }}</li>
    @endforeach
  </ul>
</div>
@endsection

Here you can see a typo in the li tag: deliveryPoint->id instead of deliverypoint->id. This causes an "undefined variable" error when I manually test the route in my browser: so far, so good.

My problem is that when testing the route with PHPUnit, the test passes instead of reporting the error. Here is the code of the feature test:

public function testIndex()
{
    $response = $this->get(
        route('deliverypoints.index')
    );

    $response->assertSuccessful()->assertViewIs(
        'deliverypoints.index'
    )->assertViewHasAll(
        ['deliverypoints']
    );
}

Since the test passes, I guess the view is successfully returned by the server, but I would expect the typo to be detected.

How can I enforce the test to make it see such errors?

I'm using laravel v5.6 with PHP v7.1.18 and PHPUnit v7.2.6.

EDIT:

I tried to clear cache using:

php artisan cache:clear
php artisan view:clear
php artisan route:clear

But still the error remains undetected.

Answer 1

I found the answer: the database wasn't seeded with DeliveryPoint instances. So the controller send an empty array to the view through DeliveryPoint::all and the loop:

@foreach ($deliverypoints as $deliverypoint)
  <li class="col-12">{{ $deliveryPoint->id }}</li>
@endforeach

wasn't executed, silenting the error.

A possible fix using factories:

public function testIndex()
{
    factory(DeliveryPoint::class)->create(); // seed the database

    $response = $this->get(
        route('deliverypoints.index')
    );

    $response->assertSuccessful()->assertViewIs(
        'deliverypoints.index'
    )->assertViewHasAll(
        ['deliverypoints']
    );
}