[TIMOB-4486] Filesystem API does not work

// Create test folder
var suitesDir = Titanium.Filesystem.getFile(Titanium.Filesystem.resourcesDirectory, 'testdata');
if(!suitesDir.exists()) {
	suitesDir.createDirectory();
	alert('suites dir created');
}
var testDir = Titanium.Filesystem.getFile(suitesDir.nativePath, 123);

if(!testDir.exists()) {
	testDir.createDirectory();
	alert('test dir created');
}

// Delete everything from this dir
var file;
var files = testDir.getDirectoryListing();
for(var ii=files.length-1; ii>=0; ii--) {
    file = Titanium.Filesystem.getFile(testDir.nativePath, files[ii]);
    file.deleteFile();
}

var testImplementation = 'alert("test");';
// Write implementation to the file
var newFile = Titanium.Filesystem.getFile(testDir.nativePath, 'test.js');
if(newFile.write(testImplementation)) {
    alert('write ok');
} else {
    alert('couldnt write file');
}