testing

Moves the mouse to the center of the widget

Presses and releases the button at the current mouse position

Runs frames until dvui.refresh was not called.

Runs exactly one frame, returning the wait_time from dvui.Window.end.

Captures one frame and return the png data for that frame.

Runs exactly one frame, creating a hash of the state of that frame and compares to an earilier saved hash,

Internal use only!

Used internally for documentation generation

Used to hash widget data during a frame for snapshot testing