Make sure you have testrpc installed, then start it.
$> npm install -g ganache-cli
$> ganache-cli -e 100000000
Make sure you have an up-to-date truffle & solidity compiler installed
$> npm uninstall -g truffle
$> npm uninstall -g solc
$> npm install -g truffle
Install dependencies
$> npm install
Run tests :
$> truffle test test/GalionTokenSale.test.js