@Test public void testSetProtocolKey() { ProtocolMessage emptyMessage = new ProtocolMessage(); assertEquals(emptyMessage.setProtocolKey(" foo "), emptyMessage.getMessage()); assertEquals(emptyMessage.getProtocolKey(), "foo"); emptyMessage.setProtocolKey("bar"); assertEquals(emptyMessage.getProtocolKey(), "bar"); assertEquals(emptyMessage.getMessage(), "bar"); assertEquals(emptyMessage.getPayload(), ""); ProtocolMessage aytMessage = new ProtocolMessage("ayt"); assertEquals(aytMessage.setProtocolKey("foo"), "foo"); aytMessage.append("bar"); assertEquals(aytMessage.setProtocolKey("ayt"), "ayt bar"); }