@@ -0,0 +1,446 @@
+package com.tngtech.jgiven.impl;%0A%0Apublic class Timer %7B%0A  private long startNanoseconds;%0A  private long elapsedTime = -1L;%0A%0A  public Timer() %7B%0A    startNanoseconds = System.nanoTime();%0A  %7D%0A%0A  public void reset() %7B%0A    elapsedTime = -1L;%0A    startNanoseconds = System.nanoTime();%0A  %7D%0A%0A  public long stop() %7B%0A    if (elapsedTime != -1L)%0A      return elapsedTime;%0A    elapsedTime = System.nanoTime() - startNanoseconds;%0A    return elapsedTime;%0A  %7D%0A%7D%0A

Add timer class for tests