add MockEmail class

Author: samsonasik

system/Test/Mock/MockEmail.php

@@ -0,0 +1,13 @@
+<?php namespace CodeIgniter\Test\Mock;
+
+use CodeIgniter\Email\Email;
+
+class MockEmail extends Email
+{
+	public function send($autoClear = true)
+	{
+		$this->clear();
+
+		return true;
+	}
+}