allowLinkHosts example

use PHPUnit\Framework\TestCase;
use Symfony\Component\HtmlSanitizer\HtmlSanitizer;
use Symfony\Component\HtmlSanitizer\HtmlSanitizerConfig;

class HtmlSanitizerAllTest extends TestCase
{
    private function createSanitizer(): HtmlSanitizer
    {
        return new HtmlSanitizer(
            (new HtmlSanitizerConfig())
                ->allowStaticElements()
                ->allowLinkHosts(['trusted.com', 'external.com'])
                ->allowMediaHosts(['trusted.com', 'external.com'])
                ->allowRelativeLinks()
                ->allowRelativeMedias()
                ->forceHttpsUrls()
        );
    }

    /** * @dataProvider provideSanitizeHead */
    public function testSanitizeHead(string $input, string $expected)
    {

$this->assertSame(
            '<a>Hello world</a>',
            $this->sanitize($config, '<a href="mailto:galopintitouan@gmail.com">Hello world</a>')
        );
    }

    public function testAllowLinksHosts()
    {
        $config = (new HtmlSanitizerConfig())
            ->allowElement('a', ['href'])
            ->allowLinkHosts(['trusted.com'])
        ;

        $this->assertSame(
            '<a href="https://trusted.com">Hello world</a>',
            $this->sanitize($config, '<a href="https://trusted.com">Hello world</a>')
        );

        $this->assertSame(
            '<a>Hello world</a>',
            $this->sanitize($config, '<a href="https://untrusted.com">Hello world</a>')
        );
    }

        $config = new HtmlSanitizerConfig();
        $this->assertSame(['http', 'https', 'mailto', 'tel'], $config->getAllowedLinkSchemes());
        $this->assertNull($config->getAllowedLinkHosts());
        $this->assertSame(['http', 'https', 'data'], $config->getAllowedMediaSchemes());
        $this->assertNull($config->getAllowedMediaHosts());
        $this->assertFalse($config->getForceHttpsUrls());

        $config = $config->allowLinkSchemes(['http', 'ftp']);
        $this->assertSame(['http', 'ftp'], $config->getAllowedLinkSchemes());

        $config = $config->allowLinkHosts(['symfony.com', 'example.com']);
        $this->assertSame(['symfony.com', 'example.com'], $config->getAllowedLinkHosts());

        $config = $config->allowRelativeLinks();
        $this->assertTrue($config->getAllowRelativeLinks());

        $config = $config->allowMediaSchemes(['https']);
        $this->assertSame(['https'], $config->getAllowedMediaSchemes());

        $config = $config->allowMediaHosts(['symfony.com']);
        $this->assertSame(['symfony.com'], $config->getAllowedMediaHosts());