A review showed the wipe test asserted on a hand-written list of labels (deleting
the stand-in draw calls still passed) and nothing tested the clip at the call
site (replacing it with the canvas still passed). The tests now read the meshes
the frame painted: the Before window comes after the stand-in and stays inside
its side of the line, and side by side each window is painted inside its pane.
Both mutations of the code now fail them.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Nathaniel LedfordandClaude Sonnet 5.5
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