FA-31988 / Keyboard interactions / Member archive
Multi-tap keyboard character commit timing: Space fails to close pending character state or erases previous text · case 03
The event trace violates the space close rule and produces incorrect keyboard state or command output.
Case contract
Case [map,window,events]. Map maps keys to nonempty character strings. Events [kind,value,time]. Valid press cycles the pending same-key character before deadline, otherwise commits previous and starts new. Tick at or past deadline commits. Backspace cancels pending character before deleting committed text. Space commits pending then adds space; cancel drops pending only. Unknown press is ignored. Return committed text and pending [key,index,deadline] or None. Inputs are finite ordered event traces; return the stated deterministic state. Batch entries are independent. N varies the number of independent input transactions.
Why this case matters
Controlled keyboard event processing model for debugging application event logic.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| multi-tap-keypad scenario 7 | [["ad ", null], ["ad ", null], ["ad ", null]] | [["ad", null], ["ad", null], ["ad", null]] | Failed |
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