Adding unit tests

tests/unit/ResultSetTest.php

@@ -0,0 +1,12 @@
+<?php
+namespace Leaseweb\InfluxDB\Test;
+
+class ResultSetTest extends \PHPUnit_Framework_TestCase
+{
+    public function testResultSetFromRaw()
+    {
+        $this->assertTrue(
+            false
+        );
+    }
+}