[ImageJ-devel] imglib2-io as a test phase dependency of imglib-algorithms

[Curtis Rueden]

Hi Lee,

> I was thinking it would be nice (= makes my life a little easier) if
> imglib2-io was a test phase dependency of imglib-algorithms so you
> could use test images in imglib2 tests.

I think that's a good idea. However, a couple of comments:

1) net.imglib2:imglib2-io:2.0.0-SNAPSHOT will go away soon, in favor of
io.scif:scifio:0.3.0. In other words: the latest ImgOpener/ImgSaver work is
being done in the SCIFIO repository (https://github.com/scifio/scifio)
rather than in the ImgLib2 repo. The reason is that imglib2-io already
depends on SCIFIO to do this stuff, and SCIFIO depends on imglib2 core, so
why not consolidate and give all SCIFIO users the capability of working
with ImgLib2 data structures?

So, imglib-algorithms would then have a test-phase dependency on scifio.
Same difference though.

> I'm thinking of storing very small .tifs as resources

2) Rather than TIFFs, you can use .fake file paths for testing without
needing to commit any actual images to the repository. The .fake "file
format" was invented for exactly such a purpose, to make unit testing easy.
The only downside is that you can't precisely control the pixel contents,
but for unit tests you rarely need to. Rather, you typically want the test
to verify that it processes data in various structures properly (RGB vs.
grayscale, huge plane sizes, etc.).

Would that work for you?

Regards,
Curtis


On Thu, Jun 20, 2013 at 8:53 AM, Lee Kamentsky <leek at broadinstitute.org>wrote:

> Hi all,
> I was thinking it would be nice (= makes my life a little easier) if
> imglib2-io was a test phase dependency of imglib-algorithms so you could
> use test images in imglib2 tests. I'm thinking of storing very small .tifs
> as resources in the test packages, hope 100x100 pixels is a reasonable size
> for GIT, still haven't figured out the best strategy for writing the
> resource to a file so that it can be loaded.
>
> --Lee
>
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>
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