[TASK] Implement getArrayRepresentation() for Comment (#1454)

Part of #1440.

Author: oliverklee

src/Comment/Comment.php

@@ -8,10 +8,12 @@
 use Sabberworm\CSS\Position\Position;
 use Sabberworm\CSS\Position\Positionable;
 use Sabberworm\CSS\Renderable;
+use Sabberworm\CSS\ShortClassNameProvider;
 
 class Comment implements Positionable, Renderable
 {
     use Position;
+    use ShortClassNameProvider;
 
     /**
      * @var string
@@ -54,6 +56,11 @@ public function render(OutputFormat $outputFormat): string
      */
     public function getArrayRepresentation(): array
     {
-        throw new \BadMethodCallException('`getArrayRepresentation` is not yet implemented for `' . self::class . '`');
+        return [
+            'class' => $this->getShortClassName(),
+            // "contents" is the term used in the W3C specs:
+            // https://www.w3.org/TR/CSS22/syndata.html#comments
+            'contents' => $this->commentText,
+        ];
     }
 }

tests/Unit/Comment/CommentTest.php

@@ -81,12 +81,27 @@ public function getLineNumberReturnsLineNumberProvidedToConstructor(): void
     /**
      * @test
      */
-    public function getArrayRepresentationThrowsException(): void
+    public function getArrayRepresentationIncludesClassName(): void
     {
-        $this->expectException(\BadMethodCallException::class);
-
         $subject = new Comment();
 
-        $subject->getArrayRepresentation();
+        $result = $subject->getArrayRepresentation();
+
+        self::assertArrayHasKey('class', $result);
+        self::assertSame('Comment', $result['class']);
+    }
+
+    /**
+     * @test
+     */
+    public function getArrayRepresentationIncludesContents(): void
+    {
+        $contents = 'War. War never changes.';
+        $subject = new Comment($contents);
+
+        $result = $subject->getArrayRepresentation();
+
+        self::assertArrayHasKey('contents', $result);
+        self::assertSame($contents, $result['contents']);
     }
 }