Add unit tests for common/process/pythonProcess.ts

[kimadeline]

For #6065 (needs to be merged before the conda work in #8259 where I will add more tests to pythonProcess.ts)

• Pull request represents a single change (i.e. not fixing disparate/unrelated things in a single PR)
• Title summarizes what is changing
• Has a news entry file (remember to thank yourself!)
• Appropriate comments and documentation strings in the code
• Has sufficient logging.
• Has telemetry for enhancements.
• Unit tests & system/integration tests are added/updated
• Test plan is updated as appropriate
• package-lock.json has been regenerated by running npm install (if dependencies have changed)
• The wiki is updated with any design decisions/details.

[codecov-io]

Codecov Report

Merging #8329 into master will increase coverage by 0.57%.
The diff coverage is 49.31%.

@@            Coverage Diff             @@
##           master    #8329      +/-   ##
==========================================
+ Coverage   58.66%   59.23%   +0.57%     
==========================================
  Files         505      508       +3     
  Lines       22778    23236     +458     
  Branches     3740     3750      +10     
==========================================
+ Hits        13363    13765     +402     
- Misses       8522     8577      +55     
- Partials      893      894       +1

Impacted Files	Coverage Δ
src/client/datascience/serviceRegistry.ts	0% <0%> (ø)
...ractive-window/interactiveWindowCommandListener.ts	59.61% <44.44%> (-0.69%)	⬇️
src/client/datascience/jupyter/kernelService.ts	54.67% <54.67%> (ø)
src/client/datascience/jupyter/notebookStarter.ts	59.34% <59.34%> (ø)
src/client/datascience/jupyter/jupyterExecution.ts	51.03% <87.5%> (-1.34%)	⬇️
...t/datascience/jupyter/jupyterDataRateLimitError.ts	100% <0%> (ø)	⬆️
src/client/formatters/serviceRegistry.ts	100% <0%> (ø)	⬆️
...lient/datascience/jupyter/jupyterSelfCertsError.ts	100% <0%> (ø)	⬆️
src/client/debugger/extension/serviceRegistry.ts	100% <0%> (ø)	⬆️
... and 37 more

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[karthiknadig]

For this check we are only testing one of the branches. Given string manipulation here I recommend adding a test for both the branches. This is non-blocking comment, i will leave it to up to you if this is needed.

vscode-python/src/client/common/process/pythonProcess.ts

Line 54 in 47b19d0

const versionValue = json.versionInfo.length === 4 ? `${json.versionInfo.slice(0, 3).join('.')}-${json.versionInfo[3]}` : json.versionInfo.join('.');