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+package test.java.org.bankio;%0D%0A%0D%0Aimport java.util.Random;%0D%0A%0D%0Apublic abstract class CfonbTest %7B%0D%0A%09protected static String getRandomNum() %7B%0D%0A%09%09Random rand = new Random();%0D%0A%09%09return String.valueOf(rand.nextInt(500000000) + 1);%0D%0A%09%7D%0D%0A%09%0D%0A%09protected static String getRandomAlphaNum() %7B%0D%0A%09%09return %22ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz%22;%0D%0A%09%7D%0D%0A%7D%0D%0A

Improve unit tests