Testing File Uploads in Laravel

MyTest.php

class MyTest extends TestCase
{
    public function test_successful()
    {
        $type = factory(Type::class)->create([
            'type' => Type::TYPE_CHECK_IN,
        ]);
        $admin = $this->createAdmin();
        $client = factory(Client::class)->create();
        $user = factory(User::class)->create([
            'client_id' => $client->id,
            'email' => 'jeff@example.com',
        ]);
        $url = $this->url();
        $csv = new UploadedFile(base_path('tests/Resources/touchdown-check-in-import.csv'), 'touchdown-check-in-import.csv', 'text/csv', null, null, true);
        $data = [
            'client_id' => $client->id,
        ];
        $files = [
            'csv' => $csv,
        ];

        $response = $this->actingAs($admin)->call('POST', $url, $data, [], $files);

        $response->assertRedirect();
        $this->assertDatabaseHas('tracking_events', [
            'tracking_event_type_id' => $type->id,
            'user_id' => $user->id,
            'source' => Point::OPERATOR_SOURCE,
        ]);
        $this->assertDatabaseHas('tracking_points', [
            'source' => Point::OPERATOR_SOURCE,
            'latitude' => 53.72296,
            'longitude' => -0.43833,
            'timestamp' => Carbon::parse('22-07-2019 10:36')->toDateTimeString(),
        ]);
    }
}