Document PhpUnit Similarity Test

tests/Diff/SimilarityTest.php

@@ -5,9 +5,24 @@
 use jblond\Diff\Similarity;
 use PHPUnit\Framework\TestCase;
 
+/**
+ * PHPUnit Test for the Similarity class of PHP DiffLib.
+ *
+ * PHP version 7.2 or greater
+ *
+ * @package         Tests\Diff
+ * @author          Ferry Cools <[email protected]>
+ * @copyright   (c) 2020 Ferry Cools
+ * @license         New BSD License http://www.opensource.org/licenses/bsd-license.php
+ * @version         2.2.1
+ * @link            https://github.com/JBlond/php-diff
+ */
 class SimilarityTest extends TestCase
 {
 
+    /**
+     * Test the similarity ratio between two sequences with different methods.
+     */
     public function testGetSimilarity()
     {
         $similarity = new Similarity(range(1, 10), range(1, 5));