How to mock a Validation Rule in Laravel - php

Question

I want to mock a custom Validation rule (e.g. App\Rules\SomeRule). But when I run my test, it gives an Mockery\Exception\InvalidCountException: Method...should be called
exactly 1 times but called 0 times.
I've read Laravel's documentation on Mocking, on custom Validation Rules, Service Containers, Service Providers and I cannot figure out why I'm not successfully mocking the rule.
I read this thread but I'm struggling to connect it with my problem which is, "How can I test that my app is using this Rule". Or is that something I cannot test?
Here's my Rule
namespace App\Rules;
use Illuminate\Contracts\Validation\Rule;
class SomeRule implements Rule
{
public function passes($attribute, $value)
{
// some logic, returns TRUE if valid.
}
public function message()
{
//
}
}
My controller
namespace App\Http\Controllers;
use App\Rules\SomeRule;
use Illuminate\Http\Request;
class LoanController extends Controller
{
public function store(Request $request)
{
$request->validate([
'email' => ['required', new SomeRule]
]);
// ...insert in database, return json.
}
}
My Test
namespace Tests\Feature;
use Mockery;
use Tests\TestCase;
use Illuminate\Foundation\Testing\RefreshDatabase;
use App\Rules\SomeRule;
class LoansTest extends TestCase
{
use RefreshDatabase;
public function tearDown(): void
{
parent::tearDown();
Mockery::close();
}
/** #test */
public function the_sad_path__when_email_is_invalid()
{
$rule = Mockery::mock(SomeRule::class)->shouldReceive('passes')->once();
$this->app->instance(SomeRule::class, $rule);
$response = $this->json('POST', '/api/loans', ['email' => 'whatevs#gmail.com']);
}
}
I played with the idea of registering SomeRule in the AppServiceProvider. But that still didn't do anything:
public function register()
{
$this->app->bind(SomeRule::class, function ($app) {
return new SomeRule();
});
}
Code in Github

Answer 1

you need to use like this
class LoanController extends Controller
{
public function store(Request $request)
{
$request->validate([
'email' => ['required', new SomeRule()]
]);
// ...insert in database, return json.
}
}