[TEST] : low coverage in lib/domains/models

[Ishita-190]

The following files have relatively low branch and function coverage:

A lot of helper methods and error-handling branches are currently not exercised by the existing test suite:

• Context.js: validation helpers, duplicate/empty context checks, and error paths in methods like loadContext , addContext , removeContext , and setCurrentContext .
• Studio.js: early returns in start(), path validation logic (isValidFilePath), and branches in file read/write helpers.

Improving coverage here would strengthen confidence in edge cases and reduce the risk of regressions.

Steps to Reproduce:

• npx nyc npm test
• npx nyc report --reporter=html
• start coverage/index.html
• In the report, navigate to lib/domains/models
• Navigate to Context.js, Studio.js, Preview.js, SpecificationFile.js

Happy to raise a PR for this if the maintainers approve

[Ishita-190]

@Souvikns @AayushSaini101 @Shurtu-gal please take a look at this