assertContextualLinks example

// Placeholder label should not be visible, preview content should be.     $assert_session->elementNotExists('css', '.layout-builder-block__content-preview-placeholder-label');
    $assert_session->pageTextContains($content_preview_body_text);

    // Disable content preview, confirm presence of placeholder labels.     $this->assertTrue($page->hasCheckedField('layout-builder-content-preview'));
    $page->uncheckField('layout-builder-content-preview');
    $this->assertNotEmpty($assert_session->waitForElementVisible('css', '.layout-builder-block__content-preview-placeholder-label'));

    // Confirm that block content is not on page.     $assert_session->pageTextNotContains($content_preview_body_text);
    $this->assertContextualLinks();

    // Check that content preview is still disabled on page reload.     $this->getSession()->reload();
    $this->assertNotEmpty($assert_session->waitForElement('css', '.layout-builder-block__content-preview-placeholder-label'));
    $assert_session->pageTextNotContains($content_preview_body_text);
    $this->assertContextualLinks();

    // Confirm repositioning blocks works with content preview disabled.     $this->assertOrderInPage([$links_field_placeholder_label, $body_field_placeholder_label]);

    $region_content = '.layout__region--content';