Use Case

As a... user of Change Streams
I want... Change Streams to emit a close event exactly once
So that... Change Streams have a more intuitive API

User Experience

• User will be more easily able to determine when a ChangeStream can no longer be used based on when the close event is emitted

Dependencies

• None

Risks/Unknowns

• Is there any use-case that emitting the internal cursor's close events currently enables? 

Acceptance Criteria

Implementation Requirements

• Change Stream no longer forwards internal cursor's close events when the ChangeStream needs to be resumed.
• Change Stream emits close event exactly once at the end of its lifetime indicating it can no longer be used

Testing Requirements

• Add integration test verifying that ChangeStreams no longer emit close events when a resumable error is encountered
• Add integration test verifying that ChangeStreams emit close event exactly once when
  • Change stream is explicitly closed by the user
  • Change stream encounters and un-resumable error

Documentation Requirements

• Release notes should cover this

Follow Up Requirements

• None