OpenCSV in a groovy script to read in a file, filter the content and write out the result

openCsv.groovy

@Grab(group = 'net.sf.opencsv', module = 'opencsv', version = '2.3')
import au.com.bytecode.opencsv.CSVReader
import au.com.bytecode.opencsv.CSVParser
import au.com.bytecode.opencsv.CSVWriter

def TEST_FILE_NAME = 'test.csv'
def TEST_OUTPUT_FILE_NAME = 'testOut.csv'

List<String[]> rows = new CSVReader(new FileReader(new File(TEST_FILE_NAME)), CSVParser.DEFAULT_SEPARATOR, CSVParser.DEFAULT_ESCAPE_CHARACTER, CSVParser.DEFAULT_QUOTE_CHARACTER, 1).readAll()
def rowsOver100 = rows.findAll {it[1].toInteger() > 100}

File output = new File(TEST_OUTPUT_FILE_NAME)
if (output.exists())
{
    output.delete()
}
output.createNewFile()
output.withWriter { writer ->
    new CSVWriter(writer).writeAll(rowsOver100)

}

//println rows