Add fast test to check nvm uninstall with file permission error

test/fast/Running "nvm uninstall" with incorrect file permissions fails nicely

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+cd ../..
+mkdir v0.0.1
+mkdir src/node-v0.0.1
+
+sudo touch v0.0.1/sudo
+
+. ./nvm.sh
+
+RETURN_MESSAGE="$(nvm uninstall v0.0.1 2>&1)"
+CHECK_FOR="Cannot uninstall, incorrect permissions on installation folder"
+
+test "${RETURN_MESSAGE#*$CHECK_FOR}" != "$RETURN_MESSAGE" || exit 1