Add the new datamodule tests

[samet-akcay]

Description

• Add new datamodule tests.

Changes

• Bug fix (non-breaking change which fixes an issue)
• Refactor (non-breaking change which refactors the code base)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• My code follows the pre-commit style and check guidelines of this project.
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes
• I have added a summary of my changes to the CHANGELOG (not for minor changes, docs and tests).

[ashwinvaidya17]

Thanks for the efforts. I have a few comments.

[ashwinvaidya17]

We should probably use get_dataset_path for all the dataset tests. It would be a good idea in the future to make this a fixture instead of a method.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -64.42 ⚠️

Comparison is base (522858f) 81.34% compared to head (8f5f342) 16.92%.

Additional details and impacted files

@@                 Coverage Diff                 @@
##           refactor/tests     #973       +/-   ##
===================================================
- Coverage           81.34%   16.92%   -64.42%     
===================================================
  Files                 176      176               
  Lines                6812     6812               
===================================================
- Hits                 5541     1153     -4388     
- Misses               1271     5659     +4388     

Impacted Files	Coverage Δ
src/anomalib/data/avenue.py	73.62% <ø> (+2.19%)	⬆️

... and 153 files with indirect coverage changes

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[ashwinvaidya17]

Thanks for the efforts