♻️ Begins to refactor for media

For #4

tests/BasicReader.php

@@ -0,0 +1,22 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+use Shikiryu\SRSS\SRSS;
+use Shikiryu\SRSS\SRSSException;
+
+class BasicReader extends TestCase
+{
+    public function testReadBasicRSS()
+    {
+        $rss = SRSS::read(__DIR__.'/resources/basic.xml');
+        self::assertEquals('test Home Page', $rss->title);
+        $first_item = $rss->getFirst();
+        self::assertEquals('RSS Tutorial', $first_item->title);
+    }
+
+    public function testRssNotFound()
+    {
+        $this->expectException(SRSSException::class);
+        $rss = SRSS::read('not_found.xml');
+    }
+}