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From "Nathan Beyer" <nbe...@gmail.com>
Subject Re: [classlib][tests] Junit best practice
Date Thu, 26 Oct 2006 03:31:08 GMT
BTW - the script does run on Windows with ActiveState's Perl runtime.

-Nathatn

On 10/25/06, Richard Liang <richard.liangyx@gmail.com> wrote:
> Awesome. I just plan to review our junit tests, now it seems your tool
> has done what I want ;-)
>
> I highly recommend we read this article "JUnit best practices"[1] in javaworld.
>
> [1] http://www.javaworld.com/javaworld/jw-12-2000/jw-1221-junit.html
>
> On 10/25/06, Mark Hindess <mark.hindess@googlemail.com> wrote:
> >
> > Earlier in the year we discussed junit best practice.  For example,
> > making sure assertEquals calls have the expected and actual arguments in
> > the correct order to avoid getting confusing failure messages.
> >
> > Robert posted a script a week or so ago, to look for some of junit
> > issues but it didn't handle asserts that spanned multiple lines so,
> > unfortunately, it was missing the majority of them.  I had a script that
> > I'd thrown together one evening that would handle multi-line asserts but
> > annoyingly (because it read the whole file at once) couldn't report the
> > line number of the potential issue as Robert's script did.
> >
> > Inspired by Robert's post, I looked at my script again.  I've now fixed
> > it to report line numbers, added a little bit of documentation and
> > attached it to a JIRA:
> >
> >   https://issues.apache.org/jira/browse/HARMONY-1960
> >
> > It finds quite a lot of potential problems (I've appended a summary of
> > the findings below).  (There will be a few false positives but hopefully
> > not too many.)  It would be nice to fix these issues - I fixed several
> > hundred while testing the script - but more importantly we should make
> > sure we avoid adding any new issues.
> >
> > Improvements to the script would be most welcome.
> >
> > Regards,
> >  Mark.
> >
> > Types of issue identified
> >
> >     4949 should possibly use assertEquals
> >      815 actual may be a constant
> >      437 consider using separate asserts for each '&&' component
> >      330 exception may be left to junit
> >      135 actual *may* be a constant
> >       48 should be fail (always false)
> >       40 should be fail (always true)
> >       20 expected is null - should use assertNull
> >       12 consider using separate asserts for each '||' component
> >        8 expected is false - should use assertFalse
> >        7 expected is true - should use assertTrue
> >        1 should use assertNotNull
> >
> >
> > Number of Issues by module
> >
> >     1907 luni
> >     1440 swing
> >      699 math
> >      611 security
> >      335 text
> >      322 awt
> >      222 sound
> >      186 nio
> >      178 jndi
> >      123 archive
> >      118 auth
> >      117 crypto
> >      116 logging
> >       91 nio_char
> >       87 print
> >       74 regex
> >       68 concurrent
> >       45 beans
> >       41 x-net
> >       21 sql
> >        1 rmi
> >
> >
> >
> >
>
>
> --
> Richard Liang
> China Development Lab, IBM
>

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