[dudaschar]

^^^^^
Please fill the title above according to https://www.conventionalcommits.org/en/v1.0.0/.

type(scope): message

eg. fix(crud): updates ace editor width in agg pipeline view COMPASS-1111

Use feat, fix for user facing changes that should be part of release notes.

Semantic Versioning:

Package versions will be bumped automatically according to the PR title:

• The words BREAKING CHANGE in the title will cause a major bump to all the packages changed in the PR. All dependants will also have a major bump (dependencies, optionalDependencies, peerDependencies) or a patch bump (devDependencies).
• A subject starting with feat will cause a minor bump to all the packages changed in the PR. All dependants will also have a minor bump (dependencies, optionalDependencies, peerDependencies) or a patch bump (devDependencies).
• Any other change to any package will cause a patch bump to the package and all its dependants.
  -->

Description

Open Questions

Checklist

• I have signed the Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)
• New tests and/or benchmarks are included
• Documentation is changed or added

[Copilot]

🟢 Approval recommended

No active review issues remain for this test-only change covering _bsontype handling.

No open issues 🎉

What changed in this PR

Adds _bsontype regression tests for the shell BSON parser’s toJSString function, covering plain objects and BSON Timestamp values without changing production code.

Changes:

• Verifies that plain objects with their own _bsontype fields round-trip unchanged.
• Verifies Timestamp serialization with a non-enumerable own _bsontype property, matching BSON 4 behavior.

File	Description
packages/​shell-bson-parser/​src/​stringify.spec.ts	Adds two regression tests for _bsontype handling.

_{Review effort: Balanced}