Add unit tests for lib/jsonpath.ts and lib/jsonSchema.ts

[anurag629]

The JSON formatter's JSONPath query panel and JSON Schema validation panel are powered by two small pure modules that have no tests yet. They're a great first contribution: no UI work, just clear inputs and outputs.

Where to look

• lib/jsonpath.ts (runJsonPath)
• lib/jsonSchema.ts (validateSchema and SAMPLE_SCHEMA)
• lib/json-utils.ts (SAMPLE_JSON, near the end of the file)
• app/(tools)/json-formatter/components/ConversionPanel.tsx (how the UI uses them)
• lib/__tests__/json-utils.test.ts (for the existing test style)

Acceptance criteria

• New lib/__tests__/jsonpath.test.ts:
  • empty JSON returns "Paste JSON first"
  • an empty expression returns "Enter a JSONPath expression"
  • invalid JSON returns ok: false with an "Invalid JSON" message
  • $..email on SAMPLE_JSON returns 2 matches (the user's email string and preferences.notifications.email, which is true) with matching paths
  • $.user.projects[?(@.active==true)] returns only the active project
  • an expression with no matches returns ok: true and an empty list
• New lib/__tests__/jsonSchema.test.ts:
  • empty inputs return the right parseError
  • invalid data JSON and invalid schema JSON are reported separately
  • SAMPLE_SCHEMA validates SAMPLE_JSON with no errors
  • a missing required property and a value breaking minimum or minLength fail, with instanceLocation and keyword filled in
• Tests use relative imports (../jsonpath) and pass with npm run test

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Want to work on this? Comment below and I'll assign it to you. Please take one issue at a time, branch off develop, and open your PR against develop with Closes #97 in the description.

[kudala-bharani]

I'd like to take this one. I'll add the JSONPath and schema validation tests listed above. Could you assign it to me?

[anurag629]

Hey @kudala-bharani, go for it! It's yours.

Heads up, develop moved to vitest 4 today (#105), so branch off the latest develop. Let me know if you have any questions.