Execute this journey in an authorized browser environment if browser control is available. First confirm the URL and side-effect boundaries. Record actual observations, screenshots or DOM evidence, and the final state. Check that the expected output exists, not merely that a success message appeared. If browser access is unavailable, say not run and return the test plan only. Do not claim unobserved steps passed.

MY MATERIAL AND CONSTRAINTS
Fictional shop preview: search “green mug”, open the matching product, choose quantity 2, and add it to a test basket. Expected basket: one product line with quantity 2. Stop before checkout.