tests for php7

tests/CsvTest.php

@@ -1,13 +1,14 @@
 <?php
 
 use Deblan\Csv\Csv;
+use PHPUnit\Framework\TestCase;
 
 /**
  * class CsvTest.
  *
  * @author Simon Vieille <simon@deblan.fr>
  */
-class CsvTest extends \PHPUnit_Framework_TestCase
+class CsvTest extends TestCase
 {
     public function testGettersAndSettersAndDefaultValues()
     {