Organize testing

[pem70]

What It Does

Refactor unit tests for files class and core into separate files and add more unit tests on uncovered lines.

How to Test

Review Checklist
I certify that I have:

• tested my changes
• added/updated automated tests
• updated the changelog
• followed the contribution guidelines

Additional Comments

[codecov]

Codecov Report

Attention: Patch coverage is 93.08807% with 62 lines in your changes missing coverage. Please review.

Project coverage is 89.29%. Comparing base (2f36fc2) to head (6a13b4d).
Report is 239 commits behind head on main.

Files with missing lines	Patch %	Lines
.../zos_files/zowe/zos_files_for_zowe_sdk/datasets.py	89.71%	22 Missing ⚠️
src/zos_files/zowe/zos_files_for_zowe_sdk/uss.py	66.66%	20 Missing ⚠️
src/zos_files/zowe/zos_files_for_zowe_sdk/files.py	77.27%	10 Missing ⚠️
...s_files/zowe/zos_files_for_zowe_sdk/file_system.py	90.56%	5 Missing ⚠️
tests/unit/files/datasets/test_delete.py	86.36%	3 Missing ⚠️
tests/unit/core/test_config.py	96.07%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #275      +/-   ##
==========================================
+ Coverage   86.17%   89.29%   +3.11%     
==========================================
  Files          35       53      +18     
  Lines        2286     2522     +236     
==========================================
+ Hits         1970     2252     +282     
+ Misses        316      270      -46     

Flag	Coverage Δ
unittests	89.29% <93.08%> (+3.11%)	⬆️

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[zFernand0]

I love how the tests were split into their respective classes.
There is more that could be done in the future, but for now this is a really good start.

After some discussion, there will be a new PR that includes all 3 issues:

• [chore]: Refactor files and jobs into proper folders #264
• [tests]: Organize tests based on the source structure #265
• [zos-files] upload_file_to_dsn does not convert Windows line endings #104

Don't forget the comments on the previous PR:

• Refactor Files class into proper classes #274

[traeok]

LGTM, thanks @pem70 for organizing the tests 👍 I left a couple comments, but I don't have any requests for code changes.

[pem70]

Merged with new pull requests