If all product SKU contributing options have preselected values then product details view should reveal final SKU

• Type: Technical Task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.1.2
• Fix Version/s: None
• Component/s: Digital Merchandise Management → Options, Digital Store Management
• Labels: None
• Sprint: Commerce Sprint 06

Given:
Product has SKU contributor options and each option has option value marked as preselected.
There is available SKUs for preselected option values combination and we can call that SKU default sku.

Expected:
In front store, initial product details view will always resolve to default SKU.

Implement integration test which asserts that returned default SKU matches preselected sku contributor options values combination