5.1 Abstract protocol tester

An abstract protocol tester (APT) is a process that provides behaviours for testing an IUT by emulating a peer IUT at the same layer, and enabling to address a single test objective.

APTs used by the oneM2M test suite are described in figure 5.1-1. The test system will simulate valid and invalid protocol behaviour, and will analyse the reaction of the IUT.

Figure 5.1-1: Abstract protocol testers - oneM2M

As figure 5.1-1 illustrates, the corresponding ATS needs to use lower layers to establish a proper connection to the system under test (SUT) over a physical link (Lower layers link). Four different lower layers have been specified corresponding to the binding protocols considered in oneM2M: HTTP, CoAP, WebSocket and MQTT.