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Ignore the shell frame shadow in CodeMiningTest pixel scans - #4483
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Without a window manager, as under Xvfb, GTK paints a two pixel shadow along the right shell edge, which the full-width pixel scans mistook for rendered code minings. Assisted-by: multiple AI agents and layers of automated tooling 🤖
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Allows to run this test in a virtual x-server without the last pixels ignore it fails locally. |
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Without a window manager, for example under Xvfb, GTK paints a two pixel frame shadow along the right edge of the shell. The pixel scans in
CodeMiningTestcovered the full widget width and mistook that shadow for a rendered code mining, which madetestCodeMiningMultiLine,testCodeMiningEndOfLineandtestMultiLineHeaderCodeMiningfail headless. The scans now stop a few pixels short of the right edge, so the tests pass both under Xvfb and on a real desktop while still detecting actual minings.