NativeScript/apps/tests/ui/tab-view/tab-view-navigation-tests.ts

//function _createTabView(): TabView {
    //var tabView = new TabView();
    //tabView.id = "TabView";
    //return tabView;
//}

//function _createItems(count: number): Array<TabViewItem> {
    //var items = new Array<TabViewItem>();
    //for (var i = 0; i < count; i++) {
        //var label = new Label();
        //label.text = "Tab " + i;
        //var tabEntry = new TabViewItem({
            //title: "Tab " + i,
            //view: label
        //});
        //items.push(tabEntry);
    //}
    //return items;
//}

//function _createListView(): ListView {
    //var listView = new ListView();
    //listView.id = "ListView";
    //var items = Array.apply(null, Array(10)).map(function (_, i) { return i; });

    //listView.on(ListView.itemLoadingEvent, function (args: ItemEventData) {
        //var button = <Button>args.view;
        //if (!button) {
            //button = new Button();
            //args.view = button;
        //}

        //button.text = "Button" + args.index;
        //button.id = button.text;
        //button.on(Button.tapEvent, _clickHandlerFactory(args.index));
    //});

    //listView.items = items;

    //return listView;
//}

//var _clickHandlerFactory = function (index: number) {
    //return function () {
        //var pageFactory = function (): Page {
            //var detailsLabel = new Label();
            //detailsLabel.text = "Details Page " + index;
            //var detailsPage = new Page();
            //detailsPage.content = detailsLabel;
            //return detailsPage;
        //};

        //helper.navigate(pageFactory);
    //}
//}

export function testWhenNavigatingBackToANonCachedPageContainingATabViewWithAListViewTheListViewIsThere() {
    /*
    var topFrame = frameModule.topmost();
    var oldChache;

    if (topFrame.android) {
        oldChache = topFrame.android.cachePagesOnNavigate;
        topFrame.android.cachePagesOnNavigate = true;
    }

    try {

        var mainPage: Page;
        var pageFactory = function (): Page {
            var tabView = _createTabView();
            var items = [];
            items.push({
                title: "List",
                view: _createListView()
            });
            var label = new Label();
            label.text = "About";
            var aboutLayout = new StackLayout();
            aboutLayout.id = "AboutLayout";
            aboutLayout.addChild(label);
            items.push({
                title: "About",
                view: aboutLayout
            });
            tabView.items = items;

            mainPage = new Page();
            mainPage.content = tabView;

            return mainPage;
        }

        helper.navigate(pageFactory);

        var tabView = mainPage.getViewById<TabView>("TabView");

        // This will navigate to a details page. The wait is inside the method.
        _clickTheFirstButtonInTheListViewNatively(tabView);

        // Go back to the main page containing the TabView.
        helper.goBack();

        // Go back to the root tests page.
        helper.goBack();
    }
    finally {
        if (topFrame.android) {
            topFrame.android.cachePagesOnNavigate = oldChache;
        }
    }

    var listView = mainPage.getViewById<ListView>("ListView");

    TKUnit.assert(listView !== undefined, "ListView should be created when navigating back to the main page.");
    */
}
/*
export function testLoadedAndUnloadedAreFired_WhenNavigatingAwayAndBack_NoPageCaching() {
    testLoadedAndUnloadedAreFired_WhenNavigatingAwayAndBack(false);
}

export function testLoadedAndUnloadedAreFired_WhenNavigatingAwayAndBack_WithPageCaching() {
    testLoadedAndUnloadedAreFired_WhenNavigatingAwayAndBack(true);
}
*/
//function testLoadedAndUnloadedAreFired_WhenNavigatingAwayAndBack(enablePageCache: boolean) {
    //var i: number;
    //var itemCount = 3;
    //var loadedItems = [0, 0, 0];
    //var unloadedItems = [0, 0, 0];

    //var topFrame = frameModule.topmost();
    //var oldChache;

    //if (topFrame.android) {
        //oldChache = topFrame.android.cachePagesOnNavigate;
        //topFrame.android.cachePagesOnNavigate = enablePageCache;
    //}

    //try {
        //var tabView = _createTabView();
        //var items = _createItems(itemCount);
        //tabView.items = items;

        //function createLoadedFor(itemIndex: number) {
            //return function () {
                //loadedItems[itemIndex] = loadedItems[itemIndex] + 1;
            //}
        //}

        //function createUnloadedFor(itemIndex: number) {
            //return function () {
                //unloadedItems[itemIndex] = unloadedItems[itemIndex] + 1;
            //}
        //}

        //helper.buildUIAndRunTest(tabView, function () {
            //try {
                //TKUnit.waitUntilReady(() => { return items[0].view.isLoaded; }, ASYNC);

                //// Attach to loaded/unloaded events
                //for (i = 0; i < itemCount; i++) {
                    //items[i].view.on("loaded", createLoadedFor(i));
                    //items[i].view.on("unloaded", createUnloadedFor(i));
                //}

                //var detailsPageFactory = function (): Page {
                    //var detailsPage = new Page();
                    //detailsPage.content = new Label();
                    //return detailsPage;
                //};

                //helper.navigate(detailsPageFactory);
            //}
            //finally {
                //// Go back to the test page.
                //helper.goBack();
            //}

            //TKUnit.waitUntilReady(() => { return items[0].view.isLoaded; }, ASYNC);

            ////console.log(">>>>>>>>>>>>> loaded items: " + loadedItems.join(", "));
            ////console.log(">>>>>>>>>>>>> unloadedItems items: " + unloadedItems.join(", "));

            //// Check that at least the first item is loaded and unloaded
            //TKUnit.assert(items[0].view.isLoaded, "The content of the first tab should be loaded.");
            //TKUnit.assertEqual(loadedItems[0], 1, "loaded count for 1st item");
            //TKUnit.assertEqual(unloadedItems[0], 1, "unloaded count for 1st item");

            //// Check that loaded/unloaded coutns are equal for all tabs
            //for (i = 0; i < itemCount; i++) {
                //TKUnit.assert(loadedItems[i] === unloadedItems[i],
                    //"Loaded and unloaded calls are not equal for item " + i + " loaded: " + loadedItems[i] + " unloaded: " + unloadedItems[i]);
            //}
        //});
    //}
    //finally {
        //// Return original page cache value
        //if (topFrame.android) {
            //topFrame.android.cachePagesOnNavigate = oldChache;
        //}
    //}
//}

//function _clickTheFirstButtonInTheListViewNatively(tabView: TabView) {
    //if (tabView.android) {
        //var viewPager: android.support.v4.view.ViewPager = (<any>tabView)._viewPager;
        //var androidListView = <android.widget.ListView>viewPager.getChildAt(0);
        //(<android.widget.Button>androidListView.getChildAt(0)).performClick();
    //}
    //else {
        //(<UIButton>(<UITableView>tabView.ios.viewControllers[0].view.subviews[0]).cellForRowAtIndexPath(NSIndexPath.indexPathForItemInSection(0, 0)).contentView.subviews[0]).sendActionsForControlEvents(UIControlEvents.UIControlEventTouchUpInside);
    //}
//}