void assertEqualsData(byte[] exp, byte[] act) {
            assertEquals(exp.length, act.length);
            for (int i = 0; i < exp.length; ++i) {
                assertEquals(exp[i], act[i]);
            }
        }
@author Simon Thoresen Hult
@author Vegard Sjonfjell
documentapi/src/test/java/com/yahoo/documentapi/messagebus/protocol/Messages60TestCase.java