Add form block wrapper renderer

[MAILPOET-2746]

lib/DI/ContainerConfigurator.php

@@ -175,6 +175,7 @@ class ContainerConfigurator implements IContainerConfigurator {
     $container->autowire(\MailPoet\Form\Renderer::class)->setPublic(true);
     $container->autowire(\MailPoet\Form\BlocksRenderer::class);
     $container->autowire(\MailPoet\Form\TextInputStylesRenderer::class);
+    $container->autowire(\MailPoet\Form\BlockWrapperRenderer::class);
     $container->autowire(\MailPoet\Form\Block\BlockRendererHelper::class);
     $container->autowire(\MailPoet\Form\Block\Column::class);
     $container->autowire(\MailPoet\Form\Block\Columns::class);

lib/Form/BlockWrapperRenderer.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace MailPoet\Form;
+
+use MailPoet\Models\Form;
+
+class BlockWrapperRenderer {
+  public function render(array $block, string $blockContent): string {
+    return '<div class="mailpoet_paragraph">' . $blockContent . '</div>';
+  }
+}

tests/unit/Form/BlockWrapperRendererTest.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace MailPoet\Test\Form;
+
+use Codeception\Util\Fixtures;
+use MailPoet\Form\BlockWrapperRenderer;
+
+class BlockWrapperRendererTest extends \MailPoetUnitTest {
+  public function testItShouldWrapBlockContent() {
+    $renderer = new BlockWrapperRenderer();
+    $block = Fixtures::get('simple_form_body')[0];
+    $result = $renderer->render($block, 'content');
+    expect($result)->equals('<div class="mailpoet_paragraph">content</div>');
+  }
+}