Class TestRng


  • public class TestRng
    extends java.lang.Object
    Toy RNG to ensure we get predictable numbers during unit tests.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private int next  
    • Constructor Summary

      Constructors 
      Constructor Description
      TestRng​(java.lang.String seed)
      Create a new random number generator, seeded by a string.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      byte[] nextBytes​(int cnt)
      Get the next cnt bytes of random data.
      int nextInt()
      Next int
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • next

        private int next
    • Constructor Detail

      • TestRng

        public TestRng​(java.lang.String seed)
        Create a new random number generator, seeded by a string.
        Parameters:
        seed - seed to bootstrap, usually this is the test method name.
    • Method Detail

      • nextBytes

        public byte[] nextBytes​(int cnt)
        Get the next cnt bytes of random data.
        Parameters:
        cnt - number of random bytes to produce.
        Returns:
        array of cnt randomly generated bytes.
      • nextInt

        public int nextInt()
        Next int
        Returns:
        the next random integer.