test: refactor tests for system exit

[aj3sh]

Description

In our tests, we are currently mocking sys.exit. Due to this mocking, the application logic does not exit immediately in the tests, resulting in many errors failing. Therefore, this issue is being addressed through this PR by removing the mock and checking for the SystemExit exception to be raised.

Related Issue

N/A

Type of Change

Please mark the appropriate option below to describe the type of change your pull request introduces:

• Bug fix
• New feature
• Enhancement
• Documentation update
• Refactor
• Other (Tests)

Checklist

• My pull request has a clear title and description.
• I have used semantic commit messages.
  Examples: "fix: Fixed foobar bug", "feat(accounts): Added foobar feature".
• I have added/updated the necessary documentation on README.md.
• I have added appropriate test cases (if applicable) to ensure the changes are functioning correctly.

Additional Notes

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[golesuman]

Looks good

[subashcs]

Looks Good