Show why the original room cannot be selected
Synthetic request is 10:00–11:00. Maple is occupied by B-51 throughout that interval; Birch is free and meets the supplied room requirement. Maple remains in the select as disabled with a visible explanation. No new booking is recorded.
| Input or inspection | Expected view | Business meaning |
|---|---|---|
| Open candidate selector | Birch selectable; Maple disabled | Existing booking protected |
| Inspect conflict | B-51 occupies Maple 10:00–11:00 | Reason is available in text |
| Select Birch | Candidate value Birch | No confirmation event |
Inspect availability and confirmation separately
- The select has a visible label and a conflict explanation linked by aria-describedby.
- The original booking appears in a disclosure.
Does choosing Birch add a confirmed booking?
Show the worked answer
No. It selects a local candidate; the shown confirmed record remains B-51 only.
The fixture establishes Birch’s eligibility only for this stated room requirement and interval.