Added lang mock and upload mock
diff --git a/tests/mocks/libraries/upload.php b/tests/mocks/libraries/upload.php
new file mode 100644
index 0000000..988723e
--- /dev/null
+++ b/tests/mocks/libraries/upload.php
@@ -0,0 +1,3 @@
+<?php
+
+class Mock_Libraries_Upload extends CI_Upload {}
\ No newline at end of file