public void AddInterestsTest()
{
ba1.AddInterests(); ba2.AddInterests(); ba3.AddInterests();
Assert.AreEqual(0.0, ba1.Balance, tol, "ba1 add interest");
Assert.AreEqual(1000.0, ba2.Balance, tol, "ba2 add interest");
Assert.AreEqual(2060.0, ba3.Balance, tol, "ba3 add interest");
}