Gitcloned-NVM-Using/test/slow/nvm uninstall/Running 'nvm uninstall' with incorrect file permissions fails nicely

#!/bin/sh

die () { echo "$@" ; exit 1; }

# Source nvm
\. ../../../nvm.sh

# Version to install/uninstall
NVM_TEST_VERSION=5.10.1

# Make sure it's not already here
[ -e ../../../$NVM_TEST_VERSION ] && rm -R ../../../$NVM_TEST_VERSION

# Install it
nvm install $NVM_TEST_VERSION

# Make sure it installed
nvm ls | grep "$NVM_TEST_VERSION" || die "Failed to install node"

# Install global module as root
npm_path=$(which npm)
sudo -n "$npm_path" install jspm@'<2' -g || die 'either sudo failed, or `npm install jspm -g` failed`'

# Switch to another version so we can uninstall
nvm use 0.12.7

# Attempt to uninstall it
RETURN_MESSAGE="$(nvm uninstall $NVM_TEST_VERSION 2>&1)"
CHECK_FOR="Cannot uninstall, incorrect permissions on installation folder"
test "${RETURN_MESSAGE#*$CHECK_FOR}" != "$RETURN_MESSAGE" || die "Failed to show error message"