pxt-ev3/libs/touch-sensor/test.ts

sensors.touch1.onEvent(TouchSensorEvent.Pressed, function () {
})
sensors.touch2.onEvent(TouchSensorEvent.Bumped, function () {
})
sensors.touch3.onEvent(TouchSensorEvent.Released, function () {
})
sensors.touch4.isPressed();
sensors.touch4.wasPressed();