Is it possible to write cases for unit tests using Javadoc?

Question

Java

Can you please tell me if there are any frameworks that can make it possible to write test cases (like stories for bdd) directly in javadoc?
For example:

/**
 * @case given a=3 and b=4 returns 7
 */
 public int sum(int a, int b);

It will be great if you share more projects where this is used or say why it is bad.