This is the DBus API found in insanity/dbustest.py.

interface net.gstreamer.Insanity.Test:
  methods:
    remoteSetUp
      Create pipeline, etc.
        no arguments
    remoteStart
      The program should start run the test with the given arguments
        arguments: a dict keyed by strings
    remoteStop
      The program should stop and be ready to start again or exit normally
        no arguments
    remoteTearDown
      Destroy pipeline, etc, and exit
  signals:
    remoteReadySignal
      Sent when the program is setup and ready to start or teardown
        no arguments
    remoteStopSignal
      Sent when a test has finished running
        no arguments
    remoteValidateStepSignal
      Sent to notify insanity which test steps failed/suceceded
        arguments: string (name of step), boolean (success if true, failure if not), and optional explanatory string
    remoteExtraInfoSignal
      Sent to record any further information the tests wants recorded
        arguments: string (name of info), and whatever type is appropriate (the data)