From: Tomasz Wegrzanowski <tomasz.wegrzanowski@...>
Date: 2006-08-05T03:50:35+09:00
Subject: Re: Automatically finding gaps in unit test coverage ?

On 8/4/06, Robert Klemme <shortcutter@googlemail.com> wrote:
> Tomasz Wegrzanowski wrote:
> > Hello,
> >
> > Is it possible to somehow automatically check which parts of code
> > are not covered by unit tests ?
>
> I don't know of any mechanism built into RubyUnit or a code coverage
> tool.  But this is something you could do: use set_trace_func to trace
> all methods invoked, then at the end of a single class's test case or
> when all tests are done go through your classes and check their
> #instance_methods to verify that all of them were called.  But that
> still does not give you info whether you had a proper test case for the
> method or the method was called by some other method etc.  Maybe you can
> extend the tracing to record only methods called from a unit test.
> Still you would not know whether the method was simply called or whether
> return values were checked or whether they were checked properly.

Well, one cannot have everything :-). rcov is pretty useful for finding
missing tests. My only problem with it so far is its inability to test
coverage of metaprogrammed code, but I guess that can't be helped.

-- 
Tomasz Wegrzanowski [ http://t-a-w.blogspot.com/ ]