[Vm-dev] Re: [Pharo-project] Troubles with #flushCache and #run:with:in:

Mariano Martinez Peck marianopeck at gmail.com
Mon Jul 11 10:05:52 UTC 2011

Maybe cc'ing VM mailing list can help.

On Fri, Jul 1, 2011 at 9:32 AM, Lukas Renggli <renggli at gmail.com> wrote:

> Hi Eliot,
> I am using one of the latest VMs from your site (VM.r2434) and I
> continue to have subtle problems with objects as methods (#flushCache,
> #run:with:in:).
> The issue is that the test coverage in Pharo is kind of broken on Cog
> for a long time already. It reports methods as not covered that are
> clearly covered, and tests seem to randomly fail.
> I suspected that there is something wrong with the coverage code
> itself. So I started to experiment with TestCoverage>>flushCache and
> noticed that the current implementation
>    TestCoverage>>flushCache
>        self reference methodSymbol flushCache
> performs not that well: The set of not covered methods is wrong and
> many tests suddenly fail. If I replace it with
>    TestCoverage>>flushCache
>        self reference actualClass flushCache
> I actually get accurate coverage information, but there are still a
> few tests constantly failing. I tried to use all possible combinations
> of #flushCache (also calling it on the compiled method), but only
> flushing the cache on the class seems to work properly. So far so
> good, but I really wonder what the correct way is to flush the cache?
> :-)
> For my experiments I was using the package 'AST-Tests-Semantics'. This
> is a small package with lots of test methods that cover each method
> but one (RBSemanticAnnotationMisssing>>#isResumable). Now the "real"
> problem is that when running these tests in coverage mode, the same 4
> tests always fail:
>     RBSemanticTest>>testBlockScope
>     RBSemanticTest>>testCascadeReceiver
>     RBSemanticTest>>testClassVariableBinding
>     RBSemanticTest>>testGlobalVariableBinding
> Not sure of how to debug that? Do you have an idea why these otherwise
> passing tests suddenly fail? If you want to try to reproduce you can
> use any Pharo image with the tests loaded, or use those that I used:
> http://jenkins.lukas-renggli.ch/job/Development/lastSuccessfulBuild/artifact/omnibrowser-tests/omnibrowser-tests.changes
> http://jenkins.lukas-renggli.ch/job/Development/lastSuccessfulBuild/artifact/omnibrowser-tests/omnibrowser-tests.image
> Open the Test Runner, select 'AST-Tests-Semantics' and 'Run Coverage'.
> Any help or clarification would be appreciated :-)
> Lukas
> --
> Lukas Renggli
> www.lukas-renggli.ch

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