Re: Fail Tests on write to System.out

"Dawid Weiss [email protected] [junit]" <[email protected]> Thu, 22 Oct 2015 18:48:37 +0200
Newsgroups gmane.comp.java.junit.user
Message-ID <CAM21Rt906JtKCmJhwkj0-5hHUFSi1Uob6758QKKPF7V=yj1hBw@mail.gmail.com>
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> limiting the amount of output to a configurable number of bytes is pretty
> cool but as you
>

We didn't look for the coolness factor here, actually. In practice it's
fairly typical that developers will want to sysout stuff for debugging (in
tests). This is fine, unless the sysouts are huge, in which case this takes
resources (the runner spills outputs to disk, because there are multiple
parallel JVMs, etc.) and time. Hence the "soft limit".

As for preventing System.out calls in your production code (I suspect you
wish to enforce loggers or some other kind of infrastructure), take a look
at Uwe Schindler's forbidden-APIs tool, which parses bytecode and can fail
the build if an unwanted API is called. This is very useful because you can
apply this selectively, suppress inside code, etc.

https://github.com/policeman-tools/forbidden-apis/

Dawid

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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div=
>=C2=A0<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px =
0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-l=
eft-style:solid;padding-left:1ex"><div style=3D"background-color:rgb(255,25=
5,255)"><div><div><div>
    limiting the amount of output to a configurable number of bytes is
    pretty cool but as you </div></div></div></div></blockquote><div><br></=
div><div>We didn&#39;t look for the coolness factor here, actually. In prac=
tice it&#39;s fairly typical that developers will want to sysout stuff for =
debugging (in tests). This is fine, unless the sysouts are huge, in which c=
ase this takes resources (the runner spills outputs to disk, because there =
are multiple parallel JVMs, etc.) and time. Hence the &quot;soft limit&quot=
;.</div><div><br></div><div>As for preventing System.out calls in your prod=
uction code (I suspect you wish to enforce loggers or some other kind of in=
frastructure), take a look at Uwe Schindler&#39;s forbidden-APIs tool, whic=
h parses bytecode and can fail the build if an unwanted API is called. This=
 is very useful because you can apply this selectively, suppress inside cod=
e, etc.</div><div><br></div><div><a href=3D"https://github.com/policeman-to=
ols/forbidden-apis/">https://github.com/policeman-tools/forbidden-apis/</a>=
<br></div><div><br></div><div>Dawid</div><div><br></div></div></div></div>




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