michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/publicdomain/zero/1.0/ */
michael@0: 
michael@0: MARIONETTE_TIMEOUT = 10000;
michael@0: 
michael@0: let battery = window.navigator.battery;
michael@0: let fromStatus = "discharging";
michael@0: let fromCharging = false;
michael@0: 
michael@0: function verifyInitialState() {
michael@0:   ok(battery, "battery");
michael@0:   ok(battery.charging, "battery.charging");
michael@0:   runEmulatorCmd("power display", function (result) {
michael@0:     is(result.pop(), "OK", "power display successful");
michael@0:     ok(result.indexOf("status: Charging") !== -1, "power status charging");
michael@0:     setUp();
michael@0:   });
michael@0: }
michael@0: 
michael@0: function unexpectedEvent(event) {
michael@0:   ok(false, "Unexpected " + event.type + " event");
michael@0: }
michael@0: 
michael@0: function setUp() {
michael@0:   battery.onchargingchange = function () {
michael@0:     battery.onchargingchange = unexpectedEvent;
michael@0:     toCharging();
michael@0:   };
michael@0:   battery.onlevelchange = unexpectedEvent;
michael@0:   log("Changing power status to " + fromStatus);
michael@0:   runEmulatorCmd("power status " + fromStatus);
michael@0: }
michael@0: 
michael@0: function resetStatus(charging, nextFunction) {
michael@0:   log("Resetting power status to " + fromStatus);
michael@0:   if (charging !== fromCharging) {
michael@0:     battery.onchargingchange = function () {
michael@0:       battery.onchargingchange = unexpectedEvent;
michael@0:       nextFunction();
michael@0:     };
michael@0:     runEmulatorCmd("power status " + fromStatus);
michael@0:   }
michael@0:   else {
michael@0:     runEmulatorCmd("power status " + fromStatus, nextFunction);
michael@0:   }
michael@0: }
michael@0: 
michael@0: function changeStatus(toStatus, toCharging, nextFunction) {
michael@0:   log("Changing power status to " + toStatus);
michael@0:   if (fromCharging !== toCharging) {
michael@0:     battery.onchargingchange = function (event) {
michael@0:       battery.onchargingchange = unexpectedEvent;
michael@0:       is(event.type, "chargingchange", "event type");
michael@0:       is(battery.charging, toCharging, "battery.charging");
michael@0:       resetStatus(toCharging, nextFunction);
michael@0:     };
michael@0:     runEmulatorCmd("power status " + toStatus);
michael@0:   }
michael@0:   else {
michael@0:     runEmulatorCmd("power status " + toStatus, function () {
michael@0:       is(battery.charging, toCharging, "battery.charging");
michael@0:       resetStatus(toCharging, nextFunction);
michael@0:     });
michael@0:   }
michael@0: }
michael@0: 
michael@0: function toCharging() {
michael@0:   changeStatus("charging", true, toFull);
michael@0: }
michael@0: 
michael@0: function toFull() {
michael@0:   changeStatus("full", true, toNotCharging);
michael@0: }
michael@0: 
michael@0: function toNotCharging() {
michael@0:   changeStatus("not-charging", false, toUnknown);
michael@0: }
michael@0: 
michael@0: function toUnknown() {
michael@0:   changeStatus("unknown", false, cleanUp);
michael@0: }
michael@0: 
michael@0: function cleanUp() {
michael@0:   battery.onchargingchange = function () {
michael@0:     battery.onchargingchange = null;
michael@0:     finish();
michael@0:   };
michael@0:   battery.onlevelchange = null;
michael@0:   log("Resetting power status to charging");
michael@0:   runEmulatorCmd("power status charging");
michael@0: }
michael@0: 
michael@0: verifyInitialState();