FA-7962 / Selection controls / Member archive
Anchored range selection: An ordinary click unexpectedly extends from the old anchor · case 02
An ordinary click unexpectedly extends from the old anchor.
Case contract
Ranges include both endpoints in document order; plain clicks replace; additive selection unions; missing targets preserve selection.
Why this case matters
A deterministic model of anchored range selection; this isolates one interface invariant without requiring a browser.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| plain | ["a", "b", "c"] | ["c"] | Failed |
MEMBER ARCHIVE
The complete case is available to members.
This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
Member access is invitation-based. Sign in with your invited account to inspect the sources.
Sign in to the archive ↗