test for value persistence https://github.com/apla/me.apla.cordova.app-preferences

1.md

NOTE: this example require platform API with promise support (Promise, WinJS.Promise or $.defered)

1. Open Inspector
2. Paste test-app-preferences.js into Console
3. Run fetchIncrementStore ("test-run-count") from Console

Value must increment regardless application restart

test-app-preferences.js

var fail = [];
var pass = 0;

var appp = plugins.appPreferences;

if (typeof Promise === "undefined") {
	console.error ("this code snippet require Promise, WinJS.Promise or $.defered");
}

function fetchIncrementStore (keyName) {
	var testRunCount;
	appp.fetch (keyName).then (function (value) {
		testRunCount = value || 0;
		testRunCount++;
		pass++;
	}, function (err) {
		console.error (err);
		fail.push ('promise '+keyName+' failed');
	}).then (function () {
		appp.store (keyName, testRunCount)
	}).then (function () {
		console.info ("test run #"+testRunCount);
	}, function (err) {
		console.error (err);
	});
}

fetchIncrementStore ("test-run-count");