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from kafkatest.services.trogdor.fault_spec import FaultSpec


class NoOpFaultSpec(FaultSpec):
    """
    The specification for a nop-op fault.

    No-op faults are used to test the fault injector.  They don't do anything,
    but must be propagated to all fault injector daemons.
    """

    def __init__(self, start_ms, duration_ms):
        """
        Create a new NoOpFault.

        :param start_ms:        The start time, as described in fault_spec.py
        :param duration_ms:     The duration in milliseconds.
        """
        super(NoOpFaultSpec, self).__init__(start_ms, duration_ms)

    def message(self):
        return {
            "class": "org.apache.kafka.trogdor.fault.NoOpFaultSpec",
            "startMs": self.start_ms,
            "durationMs": self.duration_ms,
        }