    @Test
    public void shouldRegisterHandler() {

        try {
            final Long testCommandId = 815L;

            final NewCommandSourceHandler registeredHandler = this.commandHandlerProvider.getHandler("HUMAN", "UPDATE");

            final CommandProcessingResult result =
                    registeredHandler.processCommand(
                            JsonCommand.fromExistingCommand(testCommandId, null, null, null, null, null, null, null, null));
            Assert.assertEquals(testCommandId, result.commandId());
        } catch (UnsupportedCommandException ucex) {
            Assert.fail();
        }
    }