Variant selection is required before purchase when applicable

What is being checked

Checks whether required variant selections are enforced before enabling purchase actions.

Why it matters

If mandatory selections are not enforced early, users encounter preventable errors that interrupt purchase flow and increase abandonment risk.

Failure signals

• User can trigger errors after clicking CTA
• Missing variant feedback
• Silent failure

How to verify

1. Attempt to add the product to cart without selecting mandatory variants and observe whether the interface prevents progression with clear guidance.

Recommended fix

Require mandatory variant selection before enabling purchase actions and provide immediate guidance.