Running ava
on two test files, we want to manually inspect the active
process ID (PID):
$ npm test
> ava-process-isolation@0.0.1 test .../294b3be356a25a06e82b49917620d438
> ava
[ 'Addition', 'process.pid', 35149, 'process.ppid', 35148 ]
[ 'Subtraction', 'process.pid', 35149, 'process.ppid', 35148 ]
[ 'Multiplication', 'process.pid', 35150, 'process.ppid', 35148 ]
[ 'Division', 'process.pid', 35150, 'process.ppid', 35148 ]
4 tests passed