Groovy: Generate random string from given character set

Question

Using Groovy, I\'d like to generate a random sequence of characters from a given regular expression.

• Allowed charaters are: [A-Z0-9]
• Length o

Answer 1

For SoupUI users:

def generator = { String alphabet, int n ->
  new Random().with {
    (1..n).collect { alphabet[ nextInt( alphabet.length() ) ] }.join()
  }
}
randomValue = generator( (('A'..'Z')+('0'..'9')+('a'..'z')).join(), 15 )
testRunner.getTestCase().setPropertyValue("randomNumber", randomValue);