This read-only enumeration (passed(1), failed(2), inprogress(3), notinprogress(4)) reports the lifecycle of a chanTestType test: it starts at notinprogress when the connection is first added, moves to inprogress once a test is selected, and resolves to passed or failed when the test completes. An administrator polls this object after initiating a test to learn whether the connection's continuity or delay check succeeded. For example, after setting chanTestType to testdelay, an engineer would poll chanTestState until it reports passed(1) or failed(2) rather than inprogress(3).