test: cover SDK UTF-8 base64 helpers

[saurabhhhcodes]

Summary

• Add direct Bun tests for the TypeScript SDK UTF-8 Base64 helpers.
• Cover ASCII, accented, non-Latin, emoji, empty-text encoding, known fixtures, strict invalid-input rejection, and missing atob/btoa runtime errors.
• Restore overridden globals after capability tests.

Validation

• cd sdk/typescript && bun run test -- src/tests/base64.test.ts
• cd sdk/typescript && bun run typecheck
• git diff --check

Fixes #260

Note

Add tests for SDK UTF-8/base64 helper functions

Adds base64.test.ts to cover encodeUtf8ToBase64 and decodeBase64ToUtf8. Tests include round-trip encoding for ASCII, accented, non-Latin, and emoji strings, a known fixture check, rejection of invalid base64 with a specific error message, and behavior when atob/btoa globals are unavailable. A withoutGlobal helper temporarily removes and restores named globals during tests.

^{Macroscope summarized 2aff74b.}

Summary by CodeRabbit

• Tests
  • Added coverage for UTF-8 and Base64 encoding and decoding, including Unicode text, empty input, and known fixtures.
  • Added validation for invalid Base64 data and environments without native Base64 support.
  • Confirmed runtime capabilities are restored after testing.

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 54d80059-510a-4a00-9633-1c302f13c845

📥 Commits

Reviewing files that changed from the base of the PR and between a65d772 and 2aff74b.

📒 Files selected for processing (1)

• sdk/typescript/src/__tests__/base64.test.ts

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📝 Walkthrough

Walkthrough

Added TypeScript tests covering UTF-8/base64 round trips, empty and known fixture values, invalid inputs, missing atob/btoa capabilities, and restoration of modified globals.

Changes

Base64 helper validation

Layer / File(s)	Summary
Base64 helper test coverage sdk/typescript/src/__tests__/base64.test.ts	Adds Unicode round-trip cases, empty and known fixture assertions, invalid base64 checks, runtime capability tests, and safe restoration of global atob/btoa values.

Estimated code review effort: 2 (Simple) | ~10 minutes

Suggested reviewers: ankanmisra

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description includes Summary and Validation, but omits required template sections like Type Of Change and Affected Areas.	Add the missing template sections, especially Type Of Change, Affected Areas, Contributor Checklist, Screenshots, and Notes For Reviewers.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: adding tests for the SDK UTF-8 base64 helpers.
Linked Issues check	✅ Passed	The new Bun tests cover the listed helper round trips, known fixtures, invalid-input errors, runtime guards, and global restoration.
Out of Scope Changes check	✅ Passed	The change appears scoped to a new test file and does not introduce unrelated production or configuration changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[AnkanMisra]

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Reviewed commit: 2aff74ba59

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