OGPからタイトル情報が取れない場合はtitleタグから取得を試みる (#65)

refs #62

tests/Unit/MetadataResolver/OGPResolverTest.php

@@ -25,4 +25,14 @@ class OGPResolverTest extends TestCase
         $this->assertEquals('The Open Graph protocol enables any web page to become a rich object in a social graph.', $metadata->description);
         $this->assertEquals('http://ogp.me/logo.png', $metadata->image);
     }
+
+    public function testResolveTitleOnly()
+    {
+        $resolver = new OGPResolver();
+
+        $metadata = $resolver->resolve('http://example.com');
+        $this->assertEquals('Example Domain', $metadata->title);
+        $this->assertEmpty($metadata->description);
+        $this->assertEmpty($metadata->image);
+    }
 }