markdown: let Parsedown escape content

Letting Parsedown escape the content, instead of calling
htmlspecialchars provides more context to the escape process.
For example the ampersand character can now be used in markdown links as
part of the url without breaking.

src/Renderer/Twig/Extensions/Markdown.php

@@ -40,10 +40,6 @@ class Markdown extends TwigExtension
      */
     public function render(string $text, bool $escapeHtml = true): string
     {
-        if ($escapeHtml) {
-            $text = htmlspecialchars($text);
-        }
-
-        return $this->renderer->text($text);
+        return $this->renderer->setSafeMode($escapeHtml)->text($text);
     }
 }

tests/Unit/Renderer/Twig/Extensions/MarkdownTest.php

@@ -13,10 +13,7 @@ class MarkdownTest extends ExtensionTest
      */
     public function testGeFilters()
     {
-        /** @var Parsedown|MockObject $renderer */
-        $renderer = $this->createMock(Parsedown::class);
-
-        $extension = new Markdown($renderer);
+        $extension = new Markdown(new Parsedown());
         $filters = $extension->getFilters();
 
         $this->assertExtensionExists('markdown', [$extension, 'render'], $filters);
@@ -29,17 +26,12 @@ class MarkdownTest extends ExtensionTest
      */
     public function testRender()
     {
-        /** @var Parsedown|MockObject $renderer */
-        $renderer = $this->createMock(Parsedown::class);
+        $extension = new Markdown(new Parsedown());
 
-        $return = '<p>Lorem <em>&quot;Ipsum&quot;</em></p>';
-        $renderer->expects($this->once())
-            ->method('text')
-            ->with('Lorem *&quot;Ipsum&quot;*')
-            ->willReturn($return);
-
-        $extension = new Markdown($renderer);
-        $this->assertEquals($return, $extension->render('Lorem *"Ipsum"*'));
+        $this->assertEquals(
+            '<p>&lt;i&gt;Lorem&lt;/i&gt; <em>&quot;Ipsum&quot;</em></p>',
+            $extension->render('<i>Lorem</i> *"Ipsum"*'),
+        );
     }
 
     /**
@@ -47,17 +39,12 @@ class MarkdownTest extends ExtensionTest
      */
     public function testRenderHtml()
     {
-        /** @var Parsedown|MockObject $renderer */
-        $renderer = $this->createMock(Parsedown::class);
-
-        $input = '<i>**test**</i>';
-        $return = '<p><strong><i>**test**</i></strong></p>';
-        $renderer->expects($this->once())
-            ->method('text')
-            ->with($input)
-            ->willReturn($return);
-
+        $renderer = new Parsedown();
         $extension = new Markdown($renderer);
-        $this->assertEquals($return, $extension->render($input, false));
+
+        $this->assertEquals(
+            '<p><i>Lorem</i> <em>&quot;Ipsum&quot;</em></p>',
+            $extension->render('<i>Lorem</i> *"Ipsum"*', false),
+        );
     }
 }