Unit Testing Custom Validation Rules

Uppercase.php

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class Uppercase implements Rule
{
    public function passes($attribute, $value)
    {
        return strtoupper($value) === $value;
    }

    public function message()
    {
        return 'The :attribute must be uppercase.';
    }
}

UppercaseTest.php

<?php

namespace Tests\Feature\Rules;

use Tests\TestCase;
use App\Rules\Uppercase;
use Illuminate\Foundation\Testing\RefreshDatabase;

class UppercaseTest extends TestCase
{
    /** @test */
    function uppercase_strings_pass()
    {
        $rule = new Uppercase;
        $this->assertTrue($rule->passes('attribute', 'SHOULDPASS'));
    }

    /** @test */
    function mixed_strings_fail()
    {
        $rule = new Uppercase;
        $this->assertFalse($rule->passes('attribute', 'ShouldNotPass'));
    }
}

hi bro
i hava doubts how to implement unit testing in laravel 8