code: public static int methodHash(Object runner, FrameworkMethod method) {
          return ((Thread.currentThread().hashCode() * 31) + runner.hashCode()) * 31 + method.hashCode();
      }
docs: Generate a hash code for the specified runner/method pair.
  
  @param runner JUnit test runner
  @param method {@link FrameworkMethod} object
  @return hash code for the specified runner/method pair