class LinkGenerationTest

class LinkGenerationTest extends KernelTestBase {
    protected static $modules = [
        'link_generation_test',
    ];
    
    /**
     * Tests how hook_link_alter() can affect escaping of the link text.
     */
    public function testHookLinkAlter() {
        $url = Url::fromUri('http://example.com');
        $renderer = \Drupal::service('renderer');
        $link = $renderer->executeInRenderContext(new RenderContext(), function () use ($url) {
            return \Drupal::service('link_generator')->generate([
                '#markup' => '<em>link with markup</em>',
            ], $url);
        });
        $this->setRawContent($link);
        $this->assertInstanceOf(MarkupInterface::class, $link);
        // Ensure the content of the link is not escaped.
        $this->assertRaw('<em>link with markup</em>');
        // Test just adding text to an already safe string.
        \Drupal::state()->set('link_generation_test_link_alter', TRUE);
        $link = $renderer->executeInRenderContext(new RenderContext(), function () use ($url) {
            return \Drupal::service('link_generator')->generate([
                '#markup' => '<em>link with markup</em>',
            ], $url);
        });
        $this->setRawContent($link);
        $this->assertInstanceOf(MarkupInterface::class, $link);
        // Ensure the content of the link is escaped.
        $this->assertEscaped('<em>link with markup</em> <strong>Test!</strong>');
        // Test passing a safe string to t().
        \Drupal::state()->set('link_generation_test_link_alter_safe', TRUE);
        $link = $renderer->executeInRenderContext(new RenderContext(), function () use ($url) {
            return \Drupal::service('link_generator')->generate([
                '#markup' => '<em>link with markup</em>',
            ], $url);
        });
        $this->setRawContent($link);
        $this->assertInstanceOf(MarkupInterface::class, $link);
        // Ensure the content of the link is escaped.
        $this->assertRaw('<em>link with markup</em> <strong>Test!</strong>');
        // Test passing an unsafe string to t().
        $link = $renderer->executeInRenderContext(new RenderContext(), function () use ($url) {
            return \Drupal::service('link_generator')->generate('<em>link with markup</em>', $url);
        });
        $this->setRawContent($link);
        $this->assertInstanceOf(MarkupInterface::class, $link);
        // Ensure the content of the link is escaped.
        $this->assertEscaped('<em>link with markup</em>');
        $this->assertRaw('<strong>Test!</strong>');
    }

}