def 'test -- empty message body with no headers'(){
    given:
        def mockTestOutputEndpoint = MockEndpoint.resolve(context, 'mock:log:out')
        mockTestOutputEndpoint.expectedCount = 0
        def producer = context.createProducerTemplate()
    when:
        producer.sendBody('direct:test-input', '')
    then:
        1 * mockSimpleInputService.performSimpleStringTask('')
        0 * mockSimpleOutputService.performSomeOtherSimpleStringTask(_)
        mockTestOutputEndpoint.assertIsSatisfied()
}