As a Developer
I want the driver to use my injected os adapter.
So that I can collect client metadata in environments without a native Node.js os module.

User Experience

• Driver uses provided os adapter instead of require('os').

Acceptance Criteria

Implementation Requirements

• API Update: MongoClientOptions interface includes an optional, experimental property:

  /** @experimental */
  driverAdapters?: {
    os?: OsAdapter;
  }

• Resolution Logic:
  • At options parsing time, resolve the provided options with defaults (nodejs OS module)
  • Store the property in an accessible place on the MongoClient
• No Breaking Changes: The default path must result in the exact same native Node.js modules being loaded.
• Remove import: remove require('os') from all places inside src folder.
• Use os adapter provided with the mongo client options.
• Add `os` as a restricted eslint import

Testing Requirements

• • Instantiate new MongoClient() (no options). Assert that client['runtime'].os is strictly equal to the native require('os') module.
  • Instantiate new MongoClient(..., { driverAdapters: { os: mockOs }}). Assert that client['runtime'].os equals mockOs.
• ensure existing integration tests pass

Documentation Requirements

• n/a

Follow Up Requirements

• n/a