Utility functions for python tests that download their own (DICOM or other) data from the web

Development
1

I’m writing a few new automated python tests for extensions, and realized that I keep adding the same functions in my tests unchanged. These functions

  • Download data, unzip to temp folder, verify total number of unzipped files
  • Import data to temporary DICOM database from the above folder
  • Select loadables, verify plugin selection, and load loadables

Do you think it would make sense to add these in the ScriptedLoadableModuleTest class?

2

It could be added to the slicer.testing module.

Ideally, it could be used as a function or a context manager.

something like:

with TemporaryDICOMData(url="http://path/to/file.zip") as loader:
  assert loader.selected_plugins == ["plugin1", ...]
  [...]
3

Thanks! I’ll try to do it like this then. I’ll be back with a PR.

4

I think I’ll add this to https://github.com/Slicer/Slicer/blob/master/Modules/Scripted/DICOMLib/DICOMUtils.py instead. There is a feature very similar to the proposed one here already, and it would be confusing to separate them.

5

I issued the pull request: https://github.com/Slicer/Slicer/pull/835

I tested it with SubjectHierarchyGenericSelfTest and GelDosimetryAnalysis, both work well.