<?php

// ...

class LoginTest extends TestCase
{
    // ...

    public function test_user_cannot_login_with_incorrect_password()
    {
        $user = factory(User::class)->create([
            'password' => bcrypt('i-love-laravel'),
        ]);

        $response = $this->from('/login')->post('/login', [
            'email' => $user->email,
            'password' => 'invalid-password',
        ]);

        $response->assertRedirect('/login');
        $response->assertSessionHasErrors('email');
        $this->assertTrue(session()->hasOldInput('email'));
        $this->assertFalse(session()->hasOldInput('password'));
        $this->assertGuest();
    }
}