injecting-mouse-and-keyboard

You can inject mouse events into Compose UI tests using performMouseInput to simulate right-clicks, hover enter/exit, and smoothScroll on specific nodes. This validates desktop-style interactions without flaky platform workarounds.

Yes, performKeyInput enables keyDown, keyUp, and modifier-state assertions for Ctrl, Shift, Alt, and Meta keys. It safely handles modifier state using withKeyDown to prevent state leakage across tests.

To test key autorepeat, you use performKeyInput and manually advance injection event time via advanceEventTime. This controls the timing of repeated keyDown events to accurately simulate keyboard autorepeat behavior.

You use performMultiModalInput to batch mouse and keyboard flows together. This allows you to combine hover-then-click actions while holding Shift in one step, ensuring key state persists across sub-scopes.

Modifier state leaks when key events are not properly scoped. You should use withKeysDown or withKeyDown within performKeyInput to ensure injected modifier states are safely contained and cannot leak across tests.