tests: use parameterised testing using jest.each for extensions.test.ts

[aneeshrelan]

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name: ⚙ Improvement
about: Refactoring tests to reduce redundancies using jest.each
labels: enhancement

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A Pull Request should be associated with a Discussion.

Refactoring the tests to be using parameters with jest.each

Related discussion: #506

Further notes in Contribution Guidelines
Thank you for your contribution.

Description

This PR improves the test code by refactoring existing unit tests using parameterised testing by jest.each

In case this PR introduced TypeScript/JavaScript code changes:

• I have written test cases for the changes in this pull request
• I have run npm run format before the commit.
• I have run npm run lint before the commit.
• I have run npm run release before the commit.
• npm test returns with no unit test errors and all code covered.

In case this PR edits any scripts:

• I have checked the edited scripts for syntax.
• I have tested the changes in an integration test (If yes, provide workflow YAML and link). - NA

[shivammathur]

@aneeshrelan This looks very good, there are some minor changes in the review above, also it would be great if you can sort the test case data.

[aneeshrelan]

@shivammathur Resolved all feedback please check. Made this ready for review and only targeting extensions.test.ts. Will raise separate ones for other tests

[shivammathur]

Merged 🎉