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From Mark Miller <>
Subject Re: Efficiently running a single test class' tests?
Date Fri, 04 Sep 2009 20:16:35 GMT
That's some weird stuff - I've never seen a test take anywhere near  
that long (run single or not) - on my machine there are a couple that  
take a minute at most, but the majority are sub second to a couple  

- Mark (mobile)

On Sep 4, 2009, at 1:35 PM, Chris Harris <> wrote:

> I gather that you can run the tests from a single test class by
> specifying that class's name like so:
>    ant test -Dtestcase=ShingleFilterTest
> This saves time over doing "ant test" without the testcase argument,
> but it's still not at all fast on my machine. To be more specific, I
> tried the following:
> * download a fresh Lucene r811157
> * run "ant test -Dtestcase=ShingleFilterTest" a first time, to make
> sure everything required to run this test gets built
> * run "ant test -Dtestcase=ShingleFilterTest" a second time, to see
> how long running the single test takes once everything is built
> This second invocation to ant took 7 minutes, 8 seconds for ant to
> finish. Most of the time was obviously not spent running the
> ShingleFilterTest itself. According to the
> TEST-org.apache.lucene.analysis.shingle.ShingleFilterTest.xml output
> file, running that particular class took only
>    time="0.578"
> which I assume is in seconds. So the great bulk of the "ant test"
> seems to be spent in various ant housecleaning tasks, trying to verify
> that everything is indeed built, and/or looking for test classes that
> might match the name "ShingleFilterTest".
> I tried running
>    ant test-contrib -Dtestcase=ShingleFilterTest
> to see if limiting to contrib would be any faster. That came back in 5
> minutes, 27 seconds. Which is better, but still in the same ballpark.
> Is this the sort of time other people see when running a single test
> through ant? What alternatives are there if you want to be able to run
> a given test really fast -- say, after a 10 second delay, rather than
> a 5 minute delay? Does this become trivial once you set up Lucene
> properly in an IDE? Any quick command-line techniques?
> Thanks,
> Chris
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