Render fenced block how it wants to be rendered (#9)

The `FencedCode` class stores information about what delimiter character should be used, how many should be used, and what the indent offset is for the block.

src/Renderer/Block/FencedCodeRenderer.php

@@ -32,11 +32,13 @@ public function render(Node $node, ChildNodeRendererInterface $childRenderer): s
         }
 
         $content = $node->getLiteral();
+        $delimiter = str_repeat($node->getChar(), $node->getLength());
+        $offset = str_repeat(' ', $node->getOffset());
 
         return <<<TXT
-        ```{$language}
-        {$content}
-        ```
+        {$offset}{$delimiter}{$language}
+        {$offset}{$content}
+        {$offset}{$delimiter}
         TXT;
     }
 }

tests/Renderer/Block/FencedCodeRendererTest.php

@@ -6,6 +6,7 @@
 
 use League\CommonMark\Extension\CommonMark\Node\Block\FencedCode;
 use League\CommonMark\Node\Block\Document;
+use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\Attributes\Test;
 use PHPUnit\Framework\TestCase;
 use Wnx\CommonmarkMarkdownRenderer\Renderer\Block\FencedCodeRenderer;
@@ -21,11 +22,12 @@ protected function setUp(): void
     }
 
     #[Test]
-    public function it_renders_fenced_code(): void
+    #[DataProvider('provide_fenced_code')]
+    public function it_renders_fenced_code(array $fencedArgs, string $expected): void
     {
         $document = new Document();
 
-        $block = new FencedCode(3, '~', 0);
+        $block = new FencedCode(...$fencedArgs);
         $block->setInfo('php');
         $block->setLiteral('echo "hello world!";');
         $block->data->set('attributes', ['id' => 'foo', 'class' => 'bar']);
@@ -36,10 +38,36 @@ public function it_renders_fenced_code(): void
 
         $result = $this->renderer->render($block, $fakeRenderer);
 
-        $this->assertEquals(<<<TXT
-        ```php
-        echo "hello world!";
-        ```
-        TXT, $result);
+        $this->assertEquals($expected, $result);
+    }
+
+    public function provide_fenced_code(): array
+    {
+        return [
+            'tilde as char' => [
+                'fencedArgs' => [3, '~', 0],
+                'expected' => <<<TXT
+                ~~~php
+                echo "hello world!";
+                ~~~
+                TXT
+            ],
+            'backtick as char' => [
+                'fencedArgs' => [3, '`', 0],
+                'expected' => <<<TXT
+                ```php
+                echo "hello world!";
+                ```
+                TXT
+            ],
+            'offset and >3 chars' => [
+                'fencedArgs' => [5, '`', 2],
+                'expected' => <<<TXT
+                  `````php
+                  echo "hello world!";
+                  `````
+                TXT
+            ],
+        ];
     }
 }