Laravel Form Request Testing

RegisterRequest.php

<?php

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rules\Unique;

class RegisterRequest extends FormRequest
{
    const NAME_MAX_LENGTH = 255;
    const EMAIL_MAX_LENGTH = 255;
    const PASSWORD_MIN_LENGTH = 8;

    /**
     * @return array
     */
    public function rules()
    {
        return [
            'name' => ['required', 'string', 'max:' . self::NAME_MAX_LENGTH],
            'email' => ['required', 'string', 'email', 'max:' . self::EMAIL_MAX_LENGTH, new Unique('users', 'email')],
            'password' => ['required', 'string', 'min:' . self::PASSWORD_MIN_LENGTH, 'confirmed'],
        ];
    }
}

RegisterRequestTest1.php

<?php

use Tests\TestCase;
use App\Http\Requests\Web\RegisterRequest;
use Illuminate\Support\Facades\Validator;
use Illuminate\Validation\PresenceVerifierInterface;

class RegisterRequestTest extends TestCase
{
    public function test_it_contains_valid_rules()
    {
        $request = new RegisterRequest;

        $this->assertEquals([
            'name' => ['required', 'string', 'max:' . RegisterRequest::NAME_MAX_LENGTH],
            'email' => ['required', 'string', 'email', 'max:' . RegisterRequest::EMAIL_MAX_LENGTH, new Unique('users', 'email')],
            'password' => ['required', 'string', 'min:' . RegisterRequest::PASSWORD_MIN_LENGTH, 'confirmed'],
        ], $request->rules());
    }
}

RegisterRequestTest2.php

<?php

namespace Tests\Unit\Http\Requests\Web;

use Tests\TestCase;
use App\Http\Requests\Web\RegisterRequest;
use Illuminate\Support\Facades\Validator;
use Mockery;
use Illuminate\Validation\PresenceVerifierInterface;

class RegisterRequestTest extends TestCase
{
    /**
     * @param array $data Request data
     *
     * @dataProvider provideDataValidateNameSuccess
     */
    public function testValidateNameSuccess($data)
    {
        $request = new RegisterRequest;
        $rules = array_only($request->rules(), 'name');

        $validator = Validator::make($data, $rules);
        $passed = $validator->passes();

        // Can be debug with
        // dd($validator->failed());

        $this->assertTrue($passed);
    }

    public function provideDataValidateNameSuccess()
    {
        return [
            [['name' => 'Valid name']],
            [['name' => str_repeat('a', RegisterRequest::NAME_MAX_LENGTH)]],
        ];
    }

    /**
     * @param array $data Request data
     *
     * @dataProvider provideDataValidateNameFailed
     */
    public function testValidateNameFailedWhenMissingInput($data)
    {
        $request = new RegisterRequest;
        $rules = array_only($request->rules(), 'name');

        $validator = Validator::make($data, $rules);
        $passed = $validator->passes();

        $this->assertFalse($passed);
    }

    public function provideDataValidateNameFailed()
    {
        return [
            [[]],
            [['name' => '   ']],
            [['name' => '']],
        ];
    }

    public function testValidateNameFailedWhenExceedingMaxlength()
    {
        $request = new RegisterRequest;
        $rules = array_only($request->rules(), 'name');

        $validator = Validator::make([
            'name' => str_repeat('a', RegisterRequest::NAME_MAX_LENGTH + 1),
        ], $rules);

        $passed = $validator->passes();

        $this->assertFalse($passed);
    }

    /**
     * Fake database connection when using some db rules, e.g. unique, exists...
     */
    private function fakeDatabaseRuleVerifier($validator)
    {
        $presenceVerifier = Mockery::mock(PresenceVerifierInterface::class);
        /*
         * Interface PresenceVerifierInterface does not have method setConnection,
         * but validator call that method somewhere, so we need to mock that method also.
         *
         * It's a hack, not good
         * https://github.com/laravel/framework/issues/12250
         */
        $presenceVerifier->shouldReceive('setConnection');
        $validator->setPresenceVerifier($presenceVerifier);

        return $presenceVerifier;
    }

    /**
     * @param array $data Request data
     *
     * @dataProvider provideDataValidateEmailSuccess
     */
    public function testValidateEmailSuccess($data)
    {
        $request = new RegisterRequest;
        $rules = array_only($request->rules(), 'email');

        $validator = Validator::make($data, $rules);
        $presenceVerifier = $this->fakeDatabaseRuleVerifier($validator);
        $presenceVerifier->shouldReceive('getCount')->andReturn(0);

        $passed = $validator->passes();

        $this->assertTrue($passed);
    }

    public function provideDataValidateEmailSuccess()
    {
        return [
            [['email' => '[email protected]']],
        ];
    }

    /**
     * @param array $data Request data
     *
     * @dataProvider provideDataValidateEmailFailedWhenEmailInvalid
     */
    public function testValidateEmailFailedWhenEmailInvalid($data)
    {
        $request = new RegisterRequest;
        $rules = array_only($request->rules(), 'email');

        $validator = Validator::make($data, $rules);
        $presenceVerifier = $this->fakeDatabaseRuleVerifier($validator);
        // We are testing email format
        // so we make getCount return 0, meaning email had not existed in db
        $presenceVerifier->shouldReceive('getCount')->andReturn(0);

        $passed = $validator->passes();

        $this->assertFalse($passed);
    }

    public function provideDataValidateEmailFailedWhenEmailInvalid()
    {
        return [
            [[]],
            [['email' => '']],
            [['email' => '    ']],
            [['email' => 'missingdomain']],
            [['email' => '@missinguser.com']],
            [['email' => 'invalidchar &*@example.com']],
            [['email' => 'exceedlength' . str_repeat('a', RegisterRequest::EMAIL_MAX_LENGTH + 1) . '@example.com']],
        ];
    }

    public function testValidateEmailFailedWhenEmailExisted()
    {
        $request = new RegisterRequest;
        $rules = array_only($request->rules(), 'email');

        $validator = Validator::make([
            'email' => '[email protected]',
        ], $rules);
        $presenceVerifier = $this->fakeDatabaseRuleVerifier($validator);
        $presenceVerifier->shouldReceive('getCount')->andReturn(1);

        $passed = $validator->passes();

        $this->assertFalse($passed);
    }

    /**
     * @param array $data Request data
     *
     * @dataProvider provideDataValidatePasswordFailedWhenInputInvalid
     */
    public function testValidatePasswordFailedWhenInputInvalid($data)
    {
        $request = new RegisterRequest;
        $rules = array_only($request->rules(), 'password');

        $validator = Validator::make($data, $rules);

        $passed = $validator->passes();

        $this->assertFalse($passed);
    }

    public function provideDataValidatePasswordFailedWhenInputInvalid()
    {
        return [
            [[]],
            [['password' => '']],
            [['password' => '         ']],
            [['password' => str_repeat('a', RegisterRequest::PASSWORD_MIN_LENGTH - 1)]],
        ];
    }

    /**
     * @param array $data Request data
     *
     * @dataProvider provideDataValidatePasswordSuccess
     */
    public function testValidatePasswordSuccess($data)
    {
        $request = new RegisterRequest;
        $rules = array_only($request->rules(), 'password');

        $validator = Validator::make($data, $rules);

        $passed = $validator->passes();

        $this->assertTrue($passed);
    }

    public function provideDataValidatePasswordSuccess()
    {
        return [
            [['password' => ' 12345678 ', 'password_confirmation' => ' 12345678 ']],
            [
                [
                    'password' => str_repeat('a', RegisterRequest::PASSWORD_MIN_LENGTH),
                    'password_confirmation' => str_repeat('a', RegisterRequest::PASSWORD_MIN_LENGTH),
                ],
            ],
            [
                [
                    'password' => str_repeat('a', RegisterRequest::PASSWORD_MIN_LENGTH + 1),
                    'password_confirmation' => str_repeat('a', RegisterRequest::PASSWORD_MIN_LENGTH + 1),
                ],
            ],
        ];
    }
}