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Comparison tab pair: direction label · case 02

The tab workspace reports an incorrect direction label.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

A comparison tab binds ordered left/right document revisions, labels the direction, permits edits only on editable right side and handles same-document different-revision comparisons.

Why this case matters

Offline tab/panel workspace behavior; no browser or desktop framework is emulated.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
workspace regression 1	`[["b", 8], ["a", 4], "a \u2192 b", ["a", 4, "b", 8], false, false]`	`[["b", 8], ["a", 4], "b \u2192 a", ["a", 4, "b", 8], false, false]`	Failed

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