Checklist

• Tick to sign-off your agreement to the Developer Certificate of Origin (DCO) 1.1
• Added tests for code changes or test/build only changes
• Updated the change log file (CHANGES.md|CHANGELOG.md) or test/build only changes
• Completed the PR template below:

Description

Updated DbInfo sizes functionality.

1. Steps to reproduce and the simplest code sample possible to demonstrate the issue

Call db.info().getDiskSize() on CouchDB 3

2. What you expected to happen

Expected to get the actual disk size.

3. What actually happened

Got 0.

Approach

• Added DbInfo#getSizes() for access to improved sizes information from newer Couch releases.
• Corrected existing DbInfo#getDiskSize() to work with sizes object if disk_size is unavailable.

Schema & API Changes

• Added new API model DbInfo.Sizes

Security and Privacy

• "No change"

Testing

• Added new tests to DbInfoMockTests:
  • getDbInfoDiskSizeZeroWithoutException
  • getDbInfoDiskSize
  • getDbInfoDiskSizeFromSizes
  • getDbInfoSizes

Monitoring and Logging

• "No change"