Default to the default source provider

[JaysonDeMarchi]

Description (*)

Set the sourceCode to the default source provider's code by default. The sourceCode attribute is assumed to be populated even though there is no path if a shipment object has no sourceCode and single source mode is not enabled. This can result in an undefined variable error if a feature is not fully accounting for MSI. Ideally this should point to the source with the highest priority, but pointing it at the default source still seems like a better option than pointing it at no source.

Fixed Issues (if relevant)

N/A

Manual testing scenarios (*)

1. Create a shipment object without a sourceCode set.
2. Setup multiple sources.
3. Trigger the SourceDeductionProcessor.

Questions or comments

Contribution checklist (*)

• [x] Pull request has a meaningful description of its purpose
• [x] All commits are accompanied by meaningful commit messages
• [x] All new or changed code is covered with unit/integration tests (if applicable)
• [ ] All automated tests passed successfully (all builds are green)

[Stepa4man]

@magento run all tests

[JaysonDeMarchi]

@magento run all tests

[Stepa4man]

@JaysonDeMarchi thanks for your contribution.

Please cover your changes with tests. In this way, we can also better understand the problem.

Thanks