Use Case

As a Node driver engineer,
I want simpler index management internals,
So that it is easier to maintain our index management code in the future.

User Impact

• n/a - internal refactor

Dependencies

• n/a

Unknowns

• n/a

Acceptance Criteria

Implementation Requirements

• Convert index_management.test.js to Typescript
• Convert index_management.test.js to async/await
• Remove the `EnsureIndex` class
  • This class is unused and marked internal.
• Remove the `CreateIndexOperation` class
  • Rationale: this class is a subclass of CreateIndexesOperation that only does two things:
    • maps the input type of `Collection.createIndex()` to the input type of `Collection.createIndexes()`
    • returns the first item in the list of returned indexes
  • Now that we're using async-await, this can easily be removed and we can simply await the result of executing a `CreateIndexesOperation` and return the first item in the array in the collection's `CreateIndex` helper.
• Remove the three `ListIndexes` wrappers:
  • IndexInformationOperation, IndexExistsOperation and IndexesOperation all perform a `Collection.listIndexes(..).toArray()` internally, and then transform the response.  We can remove these classes and instead operate directly on the result of `listIndexes(..).toArray()`.

Testing Requirements

• ensure all tests pass.

Documentation Requirements

• n/a

Follow Up Requirements

• n/a