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+"""Test a freshly-flashed PD Buddy Sink"""
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+
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+import argparse
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+import sys
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+
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+import pdbuddy
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+
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+
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+class ExitCode:
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+ configuration_error = 1
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+ wrong_output = 2
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+
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+
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+def write_verify(sink, cfg):
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+ """Write a SinkConfig to a Sink and verify that it was written"""
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+ sink.set_tmpcfg(cfg)
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+ sink.write()
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+
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+ actual_cfg = sink.get_cfg()
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+ if actual_cfg != cfg:
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+ print('Configuration error; expected config:')
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+ print(cfg)
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+ print('actual config:')
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+ print(actual_cfg)
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+ sys.exit(ExitCode.configuration_error)
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+
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+
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+def output_verify(sink):
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+ """Verify that the Sink's output is correct"""
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+ # Get the configured voltage
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+ voltage = sink.get_cfg().v
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+ if voltage is None:
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+ voltage = 0
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+
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+ answer = input("Is the Sink's output stable at {:.1f} V [Y,n]? ".format(
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+ voltage/1000. * sink.output))
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+ if answer.lower().startswith('n'):
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+ print('Wrong output, exiting.')
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+ sys.exit(ExitCode.wrong_output)
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+
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+
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+def main():
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+ # Make the argument parser
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+ parser = argparse.ArgumentParser(description='Test a PD Buddy Sink')
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+ parser.add_argument('tty', metavar='tty', type=str, help="the Sink's tty")
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+
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+ # Parse arguments
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+ args = parser.parse_args()
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+
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+ # Define configurations for testing
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+ cfg_20v = pdbuddy.SinkConfig(status=pdbuddy.SinkStatus.VALID,
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+ flags=pdbuddy.SinkFlags.NONE, v=20000, i=1000)
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+ cfg_9v = pdbuddy.SinkConfig(status=pdbuddy.SinkStatus.VALID,
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+ flags=pdbuddy.SinkFlags.NONE, v=9000, i=1000)
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+
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+ # Run the testing procedure
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+ with pdbuddy.Sink(args.tty) as sink:
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+ # Make sure output is disabled to start
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+ sink.output = False
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+
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+ # Set initial configuration
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+ print('Writing 20 V configuration object…')
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+ write_verify(sink, cfg_20v)
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+ print('Done.')
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+
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+ # Turn on the output and ensure that it's correct
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+ sink.output = True
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+ output_verify(sink)
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+
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+ # Turn off the output and ensure that it's off
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+ sink.output = False
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+ output_verify(sink)
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+
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+ # Turn on the output again and ensure that it's back at 20 V
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+ sink.output = True
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+ output_verify(sink)
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+
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+ # Set second configuration
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+ print('Writing 9 V configuration object…')
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+ write_verify(sink, cfg_9v)
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+ print('Done.')
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+
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+ # Ensure that the output is 9 V now
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+ output_verify(sink)
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+
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+ # Erase the sink's configuration
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+ sink.erase()
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+
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+ # Ensure there's no output despite it being enabled
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+ sink.output = True
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+ output_verify(sink)
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+
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+ # Congratulations, all tests passed!
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+ print('Test successful!')
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+
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+if __name__ == '__main__':
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+ main()
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