> startServer
> pure1
$ exists target/out/a.txt
> clean
> pure1
$ exists target/out/a.txt

> clean
> map1
$ exists target/out/a.txt
$ exists target/out/b1.txt
$ exists target/out/b2.txt

> clean
> mapN1
$ exists target/out/a.txt
$ exists target/out/b1.txt
$ exists target/out/c.txt
