Proper checking of storage type

angular-storage.config.js

function StorageConfig(storeProvider) {

    storeProvider.setStore(_determineStoreType());

    function _determineStoreType() {
        if ((typeof localStorage === 'object') && _checkStorage(localStorage)) {
            return 'localStorage';
        } else if ((typeof sessionStorage === 'object') && _checkStorage(sessionStorage)) {
            return 'sessionStorage';
        } else {
            return 'cookieStorage';
        }

        function _checkStorage(storage) {
            var isStorageAvailable = false,
                testValue = Math.random().toString(36).slice(2);

            try {
                storage.setItem(testValue, testValue);
                isStorageAvailable = (storage.getItem(testValue) === testValue);
            } catch (_) {
                isStorageAvailable = false;
            } finally {
                try {
                    storage.removeItem(testValue);
                } catch (_) {
                    isStorageAvailable = false;
                }
            }

            return isStorageAvailable;
        }
    }
}