NonPrintable example

      'type plain_text render array EM tag is escaped' => [['#plain_text' => '<em>hi</em>'], Html::escape('<em>hi</em>')],
      'type hidden render array is rendered' => [['#type' => 'hidden', '#name' => 'foo', '#value' => 'bar'], "<input type=\"hidden\" name=\"foo\" value=\"bar\" />\n"],
    ];
  }

  /** * Ensures invalid content is handled correctly. */
  public function testThemeEscapeAndRenderNotPrintable() {
    $this->expectException(\Exception::class);
    theme_render_and_autoescape(new NonPrintable());
  }

  /** * Ensure cache metadata is bubbled when using theme_render_and_autoescape(). */
  public function testBubblingMetadata() {
    $link = new GeneratedLink();
    $link->setGeneratedLink('<a href="http://example.com"></a>');
    $link->addCacheTags(['foo']);
    $link->addAttachments(['library' => ['system/base']]);