Function createTestDataAdapter

tests/TestLib/TestDataSource.ts:22–741

(objects, controller, abilities)

    }

    function createTestDataAdapter(objects, controller, abilities) {

        // Private members
        var listDataNotificationHandler,
            array = [],
            keyToIndexMap = {},
            nextAvailableKey = 0,
            requests = [],
            countBeforeDelta,
            countAfterDelta,
            countBeforeOverride,
            countAfterOverride,
            dataSourceAccessed = false,
            editsInProgress = false,
            requestFulfilledSynchronously = false;

        function directivesForMethod(method, args) {
            if (controller && controller.directivesForMethod) {
                return controller.directivesForMethod(method, args);
            } else {
                return null;
            }
        }

        function getDataLength() {
            return typeof controller.returnCount === 'undefined' ? array.length : Math.min(controller.returnCount, array.length);
        }
        function item(key, data) {
            return { key: key.toString(), data: data };
        }

        function setItem(index, key, data) {
            array[index] = item(key, data);
            keyToIndexMap[key] = index;
        }

        function updateKeyToIndexMap(first) {
            // Update the key map entries for all indices that changed
            for (var i = first; i < array.length; i++) {
                keyToIndexMap[array[i].key] = i;

            }
        }

        function keyFromIndex(index) {
            return (index < 0 || index >= array.length ? null : array[index].key);
        }

        function indexIfSupported(index) {
            return (abilities && !abilities.itemsFromIndex ? undefined : index);
        }

        function itemsFromIndexImplementation(complete, error, index, countBefore, countAfter, returnAbsoluteIndex, maxLength) {
            if (controller.communicationFailure) {
                error(new WinJS.ErrorFromName(UI.FetchError.noResponse.toString()));
            } else {
                var directives = directivesForMethod("itemsFromIndex", [index, countBefore, countAfter]);