[SERVER-80068] Feature Flag Upgrade/Downgrade Testing Created: 15/Aug/23  Updated: 31/Aug/23  Resolved: 31/Aug/23

Status: Closed
Project: Core Server
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Major - P3
Reporter: PM Bot Assignee: Suganthi Mani
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Assigned Teams:
Serverless
Backwards Compatibility: Fully Compatible
Sprint: Server Serverless 2023-09-04
Participants:

 Description   

If this project includes a feature flag, please complete all upgrade/downgrade testing as part of this ticket.

1. Test how the feature behaves when upgrading FCV turns the feature on
2. Test that the correct behavior occurs when downgrading FCV completely and then upgrading FCV completely
3. Test that the correct feature behavior occurs if the FCV downgrade fails after only reaching the `downgrading` FCV state and then FCV is fully upgraded again
4. Test that anything added by this project to the setFCV command must be idempotent/retryable.



 Comments   
Comment by Suganthi Mani [ 31/Aug/23 ]

We already test the shard merge behavior during FCV changes in the tests below. So, closing the ticket as done.
1) tenant_migration_donor_recipient_fcv_mismatch.js
2) tenant_migration_donor_abort_on_fcv_change.js
3)tenant_migration_recipient_abort_on_fcv_change.js

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