[unittests] Send Mouse events via DisplayServer instead of push_input #71972
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Currently Unittests simplify mouse-events by just pushing them to Viewports. For dealing with mouse-screen-coordinates (caused by the introduction of multiple native Windows) it becomes necessary to extend the DisplayServer functionality for unittests.
This PR introduces
DisplayServerMock
based onDisplayServerHeadless
, which additionally supports basic Mouse-Input handling.This functionality is required for:
Updated 2023-01-29: Renamed
DisplayServerTests
toDisplayServerMock
.