FA-38708 / Tree accessibility / Member archive
Tree drop accessibility descriptor: Leaf inside and root sibling legality are conflated · case 03
Leaf inside and root sibling legality are conflated produces the wrong hierarchical widget state in a regression fixture.
Case contract
A drag advertises one legal drop location at a time. Inside requires a writable branch; before/after require a parent and same sibling partition. Self and descendant targets are forbidden. Copy needs copy permission. Descriptor includes announced hierarchy level and one-based insertion position.
Why this case matters
Offline executable model of a hierarchical accessibility interaction; inputs are bounded and valid as stipulated. No browser, assistive technology, or normative ARIA conformance is claimed.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| leaf inside | [true, "t", 7, 5, "copy"] | [false, "t", 7, 5, "none"] | Failed |
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