$ bash -e -o pipefail -c swiftc Sources/main.swift -o app && ./app --self-test && ./app < examples/input.txt
Tests passed
{"age":3.0999999999999996,"averageLatency":0.13333333333333333,"duplicate":0,"latencyDeviation":0.057735026918962526,"lost":1,"packets":3,"stale":true,"tag":"PT101"}
{"age":0.09999999999999964,"averageLatency":0.09999999999999964,"duplicate":0,"latencyDeviation":0,"lost":0,"packets":1,"stale":false,"tag":"TT102"}

$ ./app
{"age":3.0999999999999996,"averageLatency":0.13333333333333333,"duplicate":0,"latencyDeviation":0.057735026918962526,"lost":1,"packets":3,"stale":true,"tag":"PT101"}
{"age":0.09999999999999964,"averageLatency":0.09999999999999964,"duplicate":0,"latencyDeviation":0,"lost":0,"packets":1,"stale":false,"tag":"TT102"}

$ ./app
Missing input

$ ./app
Invalid CSV row

$ ./app --unsupported
Unsupported command arguments

$ ./app
Input record too large